[xj] XJ5.3C Wiring harness (1975 D-Jetronic)

The FI ECU sitting in the luggage compartment has an iffy
earth connection. Does anybody know where the earth
connection is, or does anybody know if a drawing of the
physical harness layout is available somewhere on the web?–
PEXJC
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In reply to a message from PEXJC sent Tue 21 Apr 2009:

Hmmm, it’s been a while since I messed with one of those, but IIRC,
the efi ground is in the engine compartment. There should be a
bundle of black grounds on a bolt somewhere (sorry, I can’t
remember exactly where). Maybe someone else will be better help.–
The original message included these comments:

The FI ECU sitting in the luggage compartment has an iffy
earth connection. Does anybody know where the earth
connection is, or does anybody know if a drawing of the
physical harness layout is available somewhere on the web?


John Testrake 74XJ12L rhd, 84 XJ6 700R4
St.Louis, United States
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John,

Isnt there a service bulletin to add one or two additional grounds to the system on the V-12
cars?

When I took mine into the garage the mechanic, who is very experienced with the V-12 cars,
checked my grounds right off to make sure that they were not the problem.

A ground is easy to do and you cannot have too many, so if someone is not sure then add
an additional one to the engine and chassis and see if it helps IMHO.

Joe AOn 21 Apr 2009 at 20:14, John Testrake wrote:

In reply to a message from PEXJC sent Tue 21 Apr 2009:

Hmmm, it’s been a while since I messed with one of those, but IIRC,
the efi ground is in the engine compartment. There should be a
bundle of black grounds on a bolt somewhere (sorry, I can’t
remember exactly where). Maybe someone else will be better help.

The original message included these comments:

The FI ECU sitting in the luggage compartment has an iffy
earth connection. Does anybody know where the earth
connection is, or does anybody know if a drawing of the
physical harness layout is available somewhere on the web?


John Testrake

===================================================
The archives and FAQ will answer many queries on the XJ series…
FAQs: http://www.jag-lovers.org/xjlovers/xjfaq/index.html
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In reply to a message from joe@joea.com sent Tue 21 Apr 2009:

Found it: RH rear / top of engine. Most strands broken.
Fixed, now she runs as sweetly as ever.–
The original message included these comments:

Hmmm, it’s been a while since I messed with one of those, but IIRC,
the efi ground is in the engine compartment. There should be a
bundle of black grounds on a bolt somewhere (sorry, I can’t
remember exactly where). Maybe someone else will be better help.


PEXJC
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php

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The archives and FAQ will answer many queries on the XJ series…
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In reply to a message from joe@joea.com sent Tue 21 Apr 2009:

I just added (2) to my '72 S1 this week, Napa has braided ground
straps about a foot long with one smallish ring connector and a
larger one the other end. You can enlarge the holes with a round
file.

Napa 770-6119 for $5.99 USD each. One for the engine to ground and
then ground to body. Gets rid of those ‘‘gremlins’’.–
The original message included these comments:

A ground is easy to do and you cannot have too many, so if someone is not sure then add
an additional one to the engine and chassis and see if it helps IMHO.


'71 XJ6 383/200R, '72 XJ6 LT1/700R,'74 XJ6 383/700R
Glendora, CA, United States
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The archives and FAQ will answer many queries on the XJ series…
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