[xj] Xj6 S2 wiring schematic

XJ
1

after much frustration with my haynes workshop manual schematics
(poor printing) I decided to redo the lot in colour, it’s not the
greatest but better to use, the schematic covers mainly s2 with
some s1 & 3,if you would like a copy to print, email me & i’ll send
you an ms word doc, docx or pdf (your choice)when printed on a4 (4
sheets)the schematic x 3 sheets will measure 22’’ long(approx)when
joined & single sheet index.other schematics I have are 2.8 & 4.2
left and right hand drive including chassis # range, hope all this
helps someone other than just me…ty…tom
quick view link> http://www.jag-lovers.org/v.htm?1332046533--
xj tom
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2

In reply to a message from xj tom sent Mon 19 Mar 2012:

Tom thats a great effort. Certainly the diagram seems much easier
to follow in colour, One can see the logic behind the layout. Pity
Haynes hadn’t thought of it.–
Neville S1 XJ12, Megasquirt ECU
Christchurch, New Zealand
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3

In reply to a message from Nev.W sent Wed 21 Mar 2012:

neville,thank you for the feed back, i’m in the process of doing
all series 1-2 & 3, it’s keeping me from going nuts as i’m layed up
after having a run in with my jag S2, the jag won & I got the
broken bones, as mad as it sounds i’m enjoying the project & i’m
glad other ppl can get something from it,will post up the entire
collection soon…ty…tom–
xj tom
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4

In reply to a message from xj tom sent Wed 21 Mar 2012:

That’s good news Tom, I look forward to the next post. I must admit
though, that the wiring in my own late series 1 car doesn’t comply
with the published S1 diagram, not does it comply with a series 2
diagram, so these are at best a guide. It would appear that as the
model progressed through it’s life cycle the diagrams weren’t
updated till a new model appeared.–
The original message included these comments:

neville,thank you for the feed back, i’m in the process of doing
all series 1-2 & 3, it’s keeping me from going nuts as i’m layed up

–
Neville S1 XJ12, Megasquirt ECU
Christchurch, New Zealand
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5

In reply to a message from Nev.W sent Thu 22 Mar 2012:

Neville, i’ll agree on that & i’m almost complete with series 1& 2
with 3 on the way, i’ll make an updated sample post on the pics
page when 1& 2 are done…ty…tom–
xj tom
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6

Nev.W wrote:

In reply to a message from xj tom sent Wed 21 Mar 2012:

That’s good news Tom, I look forward to the next post. I must admit
though, that the wiring in my own late series 1 car doesn’t comply
with the published S1 diagram, not does it comply with a series 2
diagram, so these are at best a guide. It would appear that as the
model progressed through it’s life cycle the diagrams weren’t
updated till a new model appeared.

Indeed, Neville - and sometimes not even then, or getting it plain
wrong…:slight_smile:

And don’t forget that POs sometimes did the darndest things through the
years…

Frank
xj6 85 Sov Europe (UK/NZ)>The original message included these comments:

neville,thank you for the feed back, i’m in the process of doing
all series 1-2 & 3, it’s keeping me from going nuts as i’m layed up

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7

In reply to a message from Nev.W sent Wed 21 Mar 2012:

Folks,

Kudos to Tom for his efforts with wiring diagrams! Having
recently tried to puzzle out the S2 eyestrain chart in the
Haynes manual, I’m very sympathetic to legible diagrams.

Perhaps someone can help me. I’m in the process of trying
to resuscitate a 1978 S2 (FI, US market) that has been apart
for way too long and cannot figure out what connects to a 2
wire connector in the vicinity of the two large rectangular
multiwire connectors just aft of the water rail/fuel
injection manifold. The wires entering the connector coming
through the firewall appear to be black with white stripe
and black.

Also, this particular car has a ballasted coil and the
ignition amplifier mounted on the crankcase right behind the
power steering pump, rather than on the front of the intake
manifold as in the S3 FI cars. The bundle of wires that I
think go to the coil contains both a white/longitudinal
blue stripe wire and a white/spiral blue stripe wire (along
with several others). From the various FI-related wiring
schematics I’m guessing that WU refers to the longitudinal
striped wire and W/SU or sometimes WS/U refers to the spiral
striped one. I’ve hooked up the spiral striped wire to the
low voltage side of the ballast resistor (coil negative
terminal), as I believe it goes to the tachometer, while
I’ve hooked up the white/longitudinal blue striped wire to
the other end of the ballast resistor which I think goes to
the solenoid ballast relay to provide full battery voltage
while cranking. It’s possible that a PO modified the coil
wiring, as the ballast resistor has only two terminals
(unlike the 6 shown in the Haynes manual), and there’s a
very non-Jaguar-like terminal block in the wiring, as well.
I’d appreciate any suggestions before I try the ‘‘smoke
test’’ on my 34 year old wires! Some additional differences
relative to the S3 FI cars are that this car does not have
an air injection pump or any of the piping associated, and
it doesn’t have the vacuum delay in the distributor vacuum
routing, merely being routed directly from the throttle body
to the distributor.

Regards,
ABQ Jerry–
The original message included these comments:

In reply to a message from xj tom sent Mon 19 Mar 2012:
Tom thats a great effort. Certainly the diagram seems much easier
to follow in colour, One can see the logic behind the layout. Pity
Haynes hadn’t thought of it.

–
ABQ Jerry
Albuquerque/NM, United States
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8

In reply to a message from xj tom sent Wed 21 Mar 2012:

Correction/Clarification.

In my recent post I said that I had connected the W/U wire
to the other side of the ballast resistor, which isn’t true.
Must be the wee hours as I’m typing this. Actually, the
W/SU wire is connected to the negative coil terminal, and
the WU wire is connected to the positive coil terminal.

Sorry for the confusion!

Regards,
ABQ Jerry–
ABQ Jerry
Albuquerque/NM, United States
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9

In reply to a message from ABQ Jerry sent Sat 24 Mar 2012:

I now have completed the S1 & 2 wiring including early fuel
injection, so let me know what file format you’d like, doc/docx or
pdf and I can send a zip file of single files #'ed…tom–
xj tom
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10

In reply to a message from xj tom sent Sat 24 Mar 2012:

Tom,

My preference would be a pdf file.

Thanks again for your efforts, and I hope you recover fully
and soon!

Jerry–
The original message included these comments:

In reply to a message from ABQ Jerry sent Sat 24 Mar 2012:
I now have completed the S1 & 2 wiring including early fuel
injection, so let me know what file format you’d like, doc/docx or
pdf and I can send a zip file of single files #'ed…tom

xj tom

–
ABQ Jerry
Albuquerque/NM, United States
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11

In reply to a message from ABQ Jerry sent Sat 24 Mar 2012:

I am out of the country until the weekend so I cannot check
for you but I have a 78 FI XJ6L like yours - ignition amp
attached to the block under the intake manifold, etc…

Do you have the white (off-white) mileage counter fitted on
the top of the rear end of the coolant rail. It triggers
the ‘replace O2 sensor’ light on the dashboard. Could that
be what the two wire connector goes to?

David–
The original message included these comments:

to resuscitate a 1978 S2 (FI, US market) that has been apart
for way too long and cannot figure out what connects to a 2
wire connector in the vicinity of the two large rectangular
multiwire connectors just aft of the water rail/fuel

–
David Womby 78 XJ6L 5speed
Mount Dora, Florida, United States
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