[xj] fuel tank switch on dash

How to change fuel switch? Can you use one of the other
switches to replace the inop fuel tank switch?–
jag4oliver
Windsor, CA, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–

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Oliver,

Personally I would contact David Boger on this email list (he should chime in and if not his
email is: david.boger.14 AT facebook DOT com) or if he is out then try Coventry West in
Atlanta.

Joe AOn 26 Jul 2014 at 11:58, jag4oliver wrote:

To: xj@jag-lovers.org
Subject: [xj] fuel tank switch on dash
From: “jag4oliver” williamgonyo@att.net
Date sent: Sat, 26 Jul 2014 11:58:48 -0700

How to change fuel switch? Can you use one of the other
switches to replace the inop fuel tank switch?

jag4oliver
Windsor, CA, United States

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How to change fuel switch? Can you use one of the other
switches to replace the inop fuel tank switch?

Negative - the changeover switch has two separated functions; ‘power on/off’
to the changeover and fuel return valves. The other is to switch fuel gauge
between the two tanks…

Frank
xj6 85 Sov Europe (UK/NZ)-----Original Message-----
From: jag4oliver
Sent: Sunday, July 27, 2014 6:58 AM
To: xj@jag-lovers.org
Subject: [xj] fuel tank switch on dash

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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 Frank Andersen sent Sat 26 Jul 2014:

I would add two thoughts to the advice Joe gave, a good one
with virtually guaranteed good results. Some of David’s
are function and tested used ones and others possibly NOS!
I do know his stuff of either variety works. Examples of
each reside in my car working perfectly. Albeit not fuel
selection units.

Second possible source. EBay. A bit pricey probably and
function not as positive. I did get a five window switch
set from an 87. I’ve used some. Great condition. but, do
not remember the price???

And, I’ve never taken a fuel selection switch apart.
Outwardly, they resemble a window or power switch from the
console. I’ve gotten good at pulling them, opening them up,
cleaning the contacts and restoring them to function. only
once did I find a broken part inside that made it beyond a
fix. but, I saved it for it’s good parts.

So, I suspect the fuel switch can be opened, cleaned and
restored to function. Ruining something that doesn’t work
anyway is a small loss.

Carl–
Carl Hutchins 1983 Jaguar XJ6 with LT1 and 1994 Jeep Grand
Walnut Creek, California, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
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Carl:

Sadly, the fuel switches are not easy to clean - in fact they are miserable,
fiddly, and best not tampered with, not at all like the window switches…a
good used or new one (and yes, from David Boger) is the best route.

Gregory
Victoria, Canada-----Original Message-----
From: cadjag
Sent: Sunday, July 27, 2014 7:41 AM
To: xj@jag-lovers.org
Subject: Re: [xj] fuel tank switch on dash

And, I’ve never taken a fuel selection switch apart.
Outwardly, they resemble a window or power switch from the
console
So, I suspect the fuel switch can be opened, cleaned and
restored to function. Ruining something that doesn’t work
anyway is a small loss.

Carl

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In reply to a message from jag4oliver sent Sat 26 Jul 2014:

Hi jag4oliver. First, are you absolutely sure that the
switch is your problem? There are 3 valves that switch
controls, which are more likely sources of trouble than the
switch. There is one fuel tank changeover valve, and 2
fuel return valves, at least in the series III. I would
check connections at these first. You can access the leads
for the return valves at the rear of you rear wheel wells.
There is a cover that needs to be removed on both sides,
that will give access to the bullet connectors. You can
disconnect those and check for voltage coming from the
wires coming out of the rear fenders/wings.

There is also the changeover valve located in the trunk,
near the fuel pump and radio antenna lift motor. All of
these should be receiving power when the switch is
depressed, and no power when the switch is out. If they
act as I describe, then it is probably not your switch, but
one or more of the valves themselves.

Removing the switch itself is not a difficult task. If you
have a series III like mine, you can carefully pry out the
small panel which hold it in the center pedestal. Be
careful though, as yours could be different. Mine is
an '81. I did this recently while trying to diagnose a
fuel problem on mine. But I would really encourage you to
check your voltages at the valves first. And even if you
get it there, it doesn’t mean they are working properly,
but it does tell you that the problem probably isn’t your
switch.

Another important point I should mention is that you make
sure you are getting voltage to the switch. This can
easily be done with the key on, and measuring at the switch
terminals. I don’ recall which terminal it is right now,
but with the switch out (off) you should have 12 V. at one
of the terminals to ground. I hope this helps. Good luck.

Matt
'81 XJ6, '91 XJS, '95 VDP. '99 S-Type–
The original message included these comments:

How to change fuel switch? Can you use one of the other
switches to replace the inop fuel tank switch?

jag4oliver
Windsor, CA, United States


Trilithon
–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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