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Date |
Event |
02/08/2006 5hrs
Wiring / Instruments |
Time to turn my attention to the instrument wiring.
I dug out the photographs of the instrument wiring and labelled them up for
reference. I had kept the wiring loom and proceeded to wire up the new
dash panel matching the connectors to the photograph. Almost the first
problem I came up against was the old XJ6 instruments for fuel, oil pressure
and water temperature, had different style connectors for +12v live feed
(male) and sensor inputs (female). The new instrument from Carebont (Smith's
Classic Range) have only male connectors. I devised a test
circuit using a 12v battery , 2 pieces of wire with connectors to
match the instruments. I soldered a 72 ohm resistor in one of the leads.
I tested the circuit on the old XJ6 instruments connecting one lead to
the live feed and the other (containing the resistor) to the sensor
connector. connect the live feed to the battery positive and the resistor to
the battery negative. The gauge moves slowly up the scale. I repeated this
test on the new instruments marking the +ve and sensor terminals with a
marker pen. Once I new, for sure, which way round the instruments were
to be connected I connected the XJ6 instrument looms to the new dash panel.
The XJ6 wiring loom has proprietary connectors on the end, that need to be
replaced with connectors that match the XK120 wiring loom. I'm not using the
built in warning lights for indicators. bulb failure, heated rear window
so these were left disconnected whilst I unravelled the loom and cut off the
XJ6 connectors. I removed all the redundant wing. I had
identified the instrument plugs in the wiring loom when I first laid out the
loom and labelled them. Instrument connectors #1 and #4 are the ones
needed to connect to the instruments. The task is to match the wiring
loom colours to the instrument panel loom colours. (they are different).
The way I did it was to draw the wring loom connectors (viewed from the
front) and mark each pin and the colour of the wire connected to it. I then
matched the corresponding instrument or sensor wiring to the pin on the
diagram (as viewed from the rear) this way the pins and the wire
match. I made up matching connectors by connecting the shell to
the wiring loom and marking each with a marker pen so I knew exactly how
they fitted together. I soldered pins to the end of the lead
from the instrument panel and inserted them from the back into the correct
position on the shell. I found a mistake in the listing of the
connection for instrument plug #4 in my build manual. The listing for
first connection runs over two lines which causes all the subsequent
listings to be one pin out. The listing should be follows.
white/black |
iGN negative (tacho
pulse sensor) |
green/brown |
flasher unit |
green |
+12v feed to gauges |
brown/white |
oil pressure sensor |
light green/white |
n/s indicator feed |
red/white |
gauge illumination |
I still have to sort out gauge illumination and
earth connections. Gauge illumination may be a problem because the original
XJ6 instruments had green filters fitted to them but the new instruments do
not. It will look a bit incongruous with white lighting for the
smaller gauges and green for the speedo and rev counter.
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03/08/2006 4hrs
Instruments |
I finished the wiring of the instrument panel today.
I still have to decide how I'm going to connect the indicator warning
lights. These are included in the wiring of the instrument plus because the
warning lamps were built in to he speedo and tacho instruments originally.
I suspect I'm going to strip the wiring out of the loom and connect them to
the warning light panel via a new connector. I spent the rest of
the day stripping the correct coloured wires out of the XJ6 wiring looms to
wire up the warning light panel.
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06/08/2006 7hrs
Wiring / warning Lamps |
Not much to say about the weekend. I continued to work on wiring up
the warning light panel. During the weekend the soldering iron died,
which kind of hampered things. I may have pointed out earlier that
though the male and female spade ends can be crimped in place I never seem
to get a good neat looking crimp and I prefer to solder them in place.
I was using the XJ6 warning light panel as a wiring guide which was proving
useful even though the wiring colours were different from the build manual.
One point to note was that the battery / ignition warning light had 100 Ω
resistor mounted between +12v and the charge line input to the lamp. I
surmise for two reasons. The resistor will provide the alternator with
a sensing path to +12v if the bulb fails or the resistor will act as a
pull up resistor to +12v ensuring the lamp extinguishes as the
alternator voltage increases. Either way I decided to incorporate it in to
the warning panel I'm wiring up. The problem was how-to mount resistor
securely. In the XJ6 it was soldered to the printed circuit which made it
pretty well secure. I had some resistors with heat sink mounts that
would have been ideal except they were of the wrong value. I thought about
it for a while and experimented with terminal strips that could be secured
to the panel without success. Then I decided to butcher one of the
heat sink resistors to make a mounting. The resistors are epoxy glued
in to the centre of the heat sink. It was a case of drilling out the
resistor opening out the hole to accept the resistor from the XJ6 and epoxy
glue it in place. Job done, I left it overnight to dry.
I soldered two flying leads to the resistor and covered the joints with heat
shrink sleeving to insulate them. It doesn't matter which way round the
resistor is connected but I chose white wire for one lead and white/black
for the other, to match the circuit wiring. I soldered flag type
terminations to the end, I made the +12v connection and the charge light
connection with 2 -1 piggy back connectors , this provided me with the extra
terminals to connect the resistor in place. I have made temporary
connection to all the warning lights and have decided to gather these in to
a short loom terminated in Mate-N-Lock connectors. This will give the
capability of removing the panel easily in the future, if necessary, by
disconnecting the panel as a whole from the main loom. I'm waiting for
the extra connectors to come from Vehicle Wiring Products (VWP.)
I've also decided to break out the connectors for the indicator lamps from
instrument connectors #1 and #4 and put hem in to their own
Mate-N-Lock connector that will be connected to the warning panel wiring
loom.
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08/08/2006 4hrs
Wiring |
Today I spent identifying and marking the rest of the
dashboard area wiring. I've identified most things but still have a
few connections I need to clarify with Nostalgia, to see if they are used or
there has been some change in the wiring. I also discovered,
along the way, that I was supposed to have retained the starter relay and
the lighting relay from the XJ6. Luckily, I had saved all the
electrical wiring, switches and relays so it was just a case of identifying
them. Once again my photographs taken at the time I dismantled the XJ6
proved useful. In addition I've use the Haynes Manual for the XJ6 series III
but in addition I have also used the Jaguar Heritage Museum (JHM) CD ROM for
the XJ6 Series III (1979 - 1987). This latter publication also contains
parts manuals electrical and mechanical information. If you are using
an XJS as a donor, the AJ6 engine or Getrag 5 speed box I
would also recommend the XJS 3.6 litre ( 1982 -1991) CD-ROM from JHM .
The starter relay is a Lucas type relay, part # C.36617, the headlamp
relay part number is C.38616.
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09/08/2006 9hrs
Wiring Brake Lights |
Not all these hours were productive. I spent a long time
on the brake light switch. I was aware that I had not fitted the brake light
switch but I was prompted to do something about it by the wiring loom.
I spotted a diagram of it in the JHM CD-ROM when I was looking at the
starter and Lighting relays information last night. So I knew what I
was looking for when I started the hunt through the boxes of XJ6 stuff I had
kept. It took a while but I eventually found it complete with bracket.
I spoke to Chris at Nostalgia to clear up the wiring I wanted identifying
and ask where the starter relay and flasher unit should be fitted. The
answer of on the RHS of the bonnet hinge in the engine bay now made
sense of a why I had so much of the wiring loom in the RHS foot well of the
cockpit. It needs to be fed across the bulkhead along the RHS
side of the bulkhead and in to the engine bay. Once there under the pedal
box cover between the pedal box and the bulkhead.
Back the brake light switch. I had completely
forgotten how the switch fitted to the pedal and looking at my photographs
must be one of the few components of the XJ6 I don't have a photograph of.
The JHM CD-ROM came ot the rescue. It mounts across the pedal box
secured by 2x ¼ UNC bolts the fit in to 2 tapped holes in the webs that
support the pedal pivot, in front of the pedal. It doesn't work how imagined
at all. The switch is not a push on type but a push off type. Because
it is mounted in front of the pedal. When the pedal is pushed to apply the
brakes the switch is released and makes contact switching on the stop
lights. when the pedal is released it returns pressing the switch, opening
the contacts and the stop lights go out. I fitted the bracket to
the pedal box and tested the switch operation,. Unsurprisingly, it needed
adjusting for correct operation. The switch is held in position by a
single bolt and a keep plate. Loosening this bolt allows the switch to twist
,effectively moving the operating lever closer or further away from the
pedal. Using a multimeter to check continuity across the switch and indicate
when the contacts opened . closed. With the brake pedal released
I moved the switch to it's extreme position so that he contacts were made
meter indicated the contacts were closed. I slowly rotated the switch
until the contacts opened as shown on the meter. I adjusted the switch a
small amount further to make sure the contacts were firmly held open and
tightened the securing bolt. I checked the operation of the
switch using the pedal. Just a light pressure in the pedal produced a small
amount of movement and operated the switch. Releasing the pedal opened the
switch. Satisfied with the operating I removed the bracket and the
switch and dismantled it to refurbish the bracket and clan up the switch.
I then set about rerouting the loom. I found the easiest
way to do this was to tape any loose ends to the loom with
masking tape so that they could not flap about. I withdrew the main
switch panel loom back to the main instrument panel area. These have
no preformed ends and will be easier to route later. I passed
the loom back up through the hole for the demister duct. There is a small
hole in internal supporting bracket which I sued to get the loom in to the
area above and to the right of the steering column. It's fiddly work
but it will go. To the right of the steering column there is a large
oval hole that you can get a hand in to assist with threading the loom and to
feed the loom around and out in to the engine bay. I found it useful
in threading the last part of the loom in to the engine bay and around
behind the pedal box to work from within the wheel arch. There is just
sufficient room to reach the end loom from within the wheel arch and pull it
in to the wheel arch ,then thread the loom back between the bulkhead and the
pedal box. (to be continued tomorrow......)
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11/08/2006 4hrs
Wiring Starter relay |
I did not get a lot done yesterday. I finished threading
the loom for the starter relay and the flasher unit so that I could
determine the position of the real and flasher unit on the bulkhead. I
marked their positions on the bulkhead and drilled the hole next to the
bonnet hinge for the starter relay I temporarily mounted the relay with a
#10 spire bolt. This enabled me to mark the other hole. Drilling this hole
and the mounting hole fro the flasher unit was going to be difficult since
the clutch reservoir was going to get in he way. I slept on it overnight to
think about it. Today I drilled the holes using a combination of
right angled attachments to the Dremel and short drill bits to drill 2mm
pilot holes, followed by a 4mm drill in a flexible drive to open out the
holes to self tapping size. I examined the loom and connections for
the starter relay noting the change in colour of the inhibit wire. I
need to do some meter checks to sort out the remaining connections because
both the connection to the ignition switch and the solenoid are coloured
White / Red and whichever wire goes to the solenoid doesn't look big enough.
A job for tomorrow.
Having refurbished the bracket mounting bracket I
reassembled the brake light switch and fitted it, finally adjusting it
using a multimeter as explained above.
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12/08/2006 8hrs
Wiring Ignition / Starter
Lighting |
I began by testing the wires to the starter relay to
determine which was which. carrying out continuity tests with a
digital multimeter I established which of the white/ Red wires was connected
to the ignition switch , which meant the other one was intended for the
solenoid. The green/ white wire was the inhibit switch (not used
on manual cars) which I had identified earlier when sorting out the wiring
in the region of the handbrake, but it did no harm to recheck. Brown was
obviously the live feed. I was concerned that the wire destined fro
the solenoid was a little under size for he job. It was definitely smaller
in diameter that the equivalent wire from the XJ6. Besides I couldn't
readily identify where the other end was in the loom. I had connected
the XJ6 wire to the starter motor when I fitted it to the engine. I
decided on balance to use this wire in preference to the one in the loom. It
was already covered in woven sleeving but I added some black PVC sleeving
over the top as a further protection. I loosely dressed it around the
loom to the starter relay to determine the approximate length required
. Trimmed and soldered a new end on it, I tied the inhibitor lead back
in to the loom for safety and made a new earth lead to connect to the W1
terminal in its' place. I connected the wires and mounted the relay on to
the bulkhead with 2x #10 spire bolts., using one of them to anchor the earth
lead to the bulkhead. I checked for good continuity between the battery
earth and the relay. Whilst investigating the other leads that emerge
from the wiring loom in this area I noticed a spur in the loom containing a
brown( live feed) and q white / red wire. which turned out to be the missing
other end of the solenoid wire from the starter relay. It is of no
consequence since I decided not to use it. However I will need to find out
where the +ve feed is intended to go.
Starter Relay Connections
White Red (thin) |
W2 |
Green /White (auto only) inhibit |
W1 (Manual cars connect to earth) |
White / Red (Thick) |
C1 (Starter motor solenoid) |
Brown |
+ve Feed from strip fuse. |
The next job was to fit the flasher unit. I identified
the wires and corresponding terminals. The only problem here was there are
2x green / brown wires from the warning light circuit and only
one connection on the flasher unit. It was fairly easy to sort out a 2
in to one connector to connect them ot the flasher unit. I was
suspicious from the outset that the "stick on" mounting bracket would not be
strong enough for the job, and so it proved. once the flasher unit was
mounted on the bulkhead the weight and strain of the wires proved too much
and it came unstuck. I am not a fan of attaching wires direct to
relays and flasher units I prefer them to fit in to a socket. I
decided to raid the XJ6 wiring loom. I found the flasher unit and liberated
the socket from the loom. I extracted the terminals from the base with an
extraction tool. I extracted the terminals from their covers in the
wiring loom. I checked the new "Nostalgia" Flasher unit fitted
the socket base from the XJ6. The terminal pattern was different but it
fitted the basic socket. It just needed the terminals fitted in the correct
position for the new relay. I fitted the terminals from the loom in to
the socket all except the Green Brown lead. I need to get a new terminal so
that both of them will fit the one pin. I next made a relay
mounting bracket by modifying a bracket from the XJ6 . I drilled an
mounted the bracket to utilise the hole I had already drilled in the
bulkhead. I mounted the flasher unit temporarily until I get he new
terminal.
I finished off by mounting the headlight relay on the
bulkhead behind where the instrument panel will fit. At the same time I
rerouted the loom for the light and heater switches back to the RHS of
the bulkhead, That I disturbed when routing he starter relay and flasher
unit looms.
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13/08/2006 8hrs
Wiring Warning Lights |
When I mounted the headlight relay last night I forgot to
fit the suppressor that fits between the headlamp flasher (blue / black
, 31b), and Brown (+ve Feed , 81a). It took just a few minutes
to remove and the relay and fit it.
The rest of the day I have worked on the warning
light panel I have fashioned the loom and more or less worked out the
route to the instrument panel connectors. I modified the wining loom
to extract the flasher unit and indicator wires from instrument plugs
#1 & #4. I fitted these in to a new connector #5. The reason for doing this
was to separate the connectors that supply the instrument panel from those
that service the warning light panel. I've formed the loom on the
warning light panel and fitted the mate- n -lock connectors making
sure that the wires correspond correctly with the main wiring loom.
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16/08/2006 6hrs
Wiring |
This morning started well with tidying up and re-looming
,as necessary, the branches of the main loom that connect ot the instrument
panel and making the connections from the lighting and heater looms to
the switches on the side panel. About mid morning the parts arrived
from VWP . It seems I had ordered the wrong terminals for
connecting to the flasher socket. Nothing for it but to go in to Newbury to
the Auto Electric dealer and get the correct ones. Having
returned with the correct terminals and made up the connections, I found I
could not get it to fit if I had 2 leads connected together in the one
terminal. It was simply a case of not enough space to insert the terminal
the leads in to the socket. I started to work on a solution. A single
lead would do, but would it have the current carrying capacity? If all
the bulbs in the indicator circuits were on simultaneously it would come to
a total of 88 watts. A current of 7.3 amps. I set about
identifying the current capacity of the green / brown wires in question.
I measured a strand of the wire as 0.3 mm and counted the strands in the
wire as 28. Referencing some data from VWP, the wires were capable of
carrying 25 amps continuous, making a total of 50 amps capacity over he two
wires. It doesn't take a genius to work out the circuit is massively
over engineered. I could getaway with one of the wires connected to
the flasher unit easily. Using a piece of identical wire I made a
connection that would fit the flasher socket and connect to bullet and snap
connectors to join the two wires from the loom to the flasher unit. I
joined up the connectors and taped the snap connector in to the loom to
finish it off.
I did two jobs in the afternoon. I fitted PVC
beading to the edges of all the holes in the box section at the top of the
bulkhead, through with cables or pipes pass, to protect the loom from
chafing. The second job was to tidy up and reroute the
wiring for the power resistors and air meter unit. The chosen route was
round the back of the pedal box and down the side between the pedal box nd
the wing valence. though there is plenty of room there fro the cables, I'm
having difficulty getting the meter unit connector down the side of the
pedal box. I my have to take the cover off or modify the wing valence
to give me more room.
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17/08/2006 4hrs
Wiring Bulkhead Routing |
I decided modifying the wing valence was the preferred
solution to my problem with the air meter unit wiring. Even if I had removed
the top cover over the pedal box I still would had a problem of feeding the
connector past the font casting of the pedal box. I cut a small
section off of the bottom of the wing valance, sufficient to give me enough
room to feed the outstretched cable up between the pedal box casting and the
valance. This tidied up the ECU wiring loom quite a bit though it
is still not secured in place . I will do this later.
Another problem I have been concerned about is the wiring
passing through the holes in the upper box section of the bulkhead. Most of
them I have lined the edges with PVC beading . However the RHS hole can only
be reached from underneath the steering column and has all of the wiring for
connecting to the ECU loom, flasher unit , indicator repeater, Starter
relay, inertia switch and lighting switches passing through it. I
tried it but with all these wired going through it and limited access
it was impossible to get a an edge beading around it. The
solution looked like it needed a piece of split tube that would rap around
the cables and fit in to the hole securely ,making a rubber guide that
would prevent the cables coming in contact with the edge of the hole.
As luck would have it I fond a short length of rubber hose (Part No;
AS1322- SNG Barratt) ) left over from the XJ6 cooling kit. This was
almost an exact fit to the diameter of the hole. I split it lengthwise with
a sharp knife, wrapped it around the cables and pushed it through the hole
up to about half way. I made sure the spit was at the top so that it
was in a area not in contract with the cables. Once in place I wrapped
cable tie around it to secure it so that it could not come open.
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30/08/2006 14hrs
Wiring Ignition switch
Wash Wipe Stalk |
This is accumulative time over the past 3 days
since I returned from holiday in North Devon. I've completed the
changing of the XJ6 connectors for the steering column stalks and the
ignition switch for ones compatible with the wiring loom. There
are some redundant wires in the ignition switch loom not use in the Classic
120. Brown (thin and Brown / Red for the anti run on valve and Purple
/ Green and Purple / White for the door open alarm. These wires were
trimmed back and the ends covered with heat shrink sleeving and tied back in
to the loom. On my car there was change in wiring colour. The wire
connecting to the Start Relay terminal C2 colour was given as White
Red (Jaguar Loom) but was, in fact, White / Yellow .
The wiring for the wash / wipe stalk gave me a
little trouble, I had 2x Lt Green / Black wires which were not
connected together. One was , supposedly, intended to be Black/ Light Green
for the wiper speed 1 and the other Lt Green / Black the washer button
. However it was very difficult to tell them apart. To identify
them I had to remove the stalk from the steering column and remove the
wrapping from the loom. Once the wrapping was off it became clear. the
wire from the washer button had a join in it. The true lead colour was
LT Green / Black (spiral tracer, which removed the confusion. The
connections were confirmed with a multimeter test.
Excess loom for these connectors was pushed back in to
the box section above the steering wheel. Some final securing and
tidying work still needs to be done.
I've connected the interior heater motor to it's
connector in the loom. The horn push connection is on the outer
steering column about half way down on the RHS under the bulkhead box
section. I had to make a short adapter to between the loom and the
snap connector for the horn on the column.
Lastly I fitted the inertia switch. Nostalgia fit this
switch up under the dash panel close to the windscreen pillar. I
wanted to make the switch more easily accessible in case it should operate
accidentally and needed to be reset. ( unlikely but that is how I felt
about it ). I found there was sufficient space to the right of the
accelerator pedal, high up so it was tucked out of the way and would not
interfere with the operation of the pedal. The easiest way to fit it
was to mark the position of the lower mounting hole on the bulkhead from the
inside. Drill through the bulkhead, The upper hole is more tricky to reach
but this is easily done by transferring the engine bay. From the inside the
wheel arch the hole just drilled can be easily seen. Using the inertia
switch bracket as a template ( Turn it upside down so that it
mirrors the fitting of the switch inside the car.) mark the position of the
upper hole and drill the bulkhead. From inside the car fit the inertia
switch with the reset button at the top. I made an adapter to connect the
wiring loom to the switch. I used blade connectors to connect to the loom
and bullet and snap connectors to connector the inertia switch. The
intervening wires were covered with PVC tubing.
|
31/08/2005 2hrs
Wiring Fuel Injection |
If you are not running a fuel injection system then the
following is going to be Double Dutch to you. I took another
look at the starter relay today. I had a niggling feeling that I had
made a mistake in wiring it up. The loom at this point has 2 x thin
White / Red leads set in to it. One I had correctly identified as the wire
from the ignition switch the other I had interpreted (from the build manual
) as being the starter solenoid wire. As I said earlier it did not
look big enough to handle the solenoid current and I had used the wire from
the XJ6 to make the connection from the relay to the starter solenoid.
Which left the thin red/white wire spare. This wire ends up in a short
loom close by together with a thick brown lead. The brown lead looks like
the feed to a "free" brown lead that goes into the ECU wiring loom.
When I enquired of Nostalgia about these leads it was indicated that they
were something to do with the Fuel injection system, but nothing more
specific than that. Talking to Simon yesterday he more or less confirmed
that the Brown leads should be connected together and the Red/ white lead
should be connected to the flying lead from the diode unit. but the
question was from which pin of the starter relay. A look at the lead
from the diode unit it is coloured White / Yellow, the same as
the lead in the ignition switch. Examining the Wring diagram in the HM
shows the wire coloured White / Yellow from the diode unit eventually winds
up at the ignition switch and the lead that is connected to the starter
relay W2. I did dome more research and trial fitting
of the wiring I could connect the ignition switch (white /red )
to terminal W2 and since the diode unit and the starter relay were close
together the flying lead from the diode unit could be connected to a spare
position on the W2 terminal. thus I did not need to use the spare White /Red
lead at all.
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Total hours this month 75= hrs |
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Total hours
to date = 1845 hrs |
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