XJS main beam headlamps

Carole Simpson-Hadley · July 25, 2018

Morning all

Dual purpose to this thread..............assistance in sorting out a minor malfunction on our XJS, at the same time logging helpful (hopefully) info for other XJS owners.

Our XJS is a '92 4.0 Phase 1 facelift. Main beam headlights illuminate when the operating arm/stalk is operated for "flash" mode, also when arm is operated for constant main beam, but the main beam illumination does not hold on when the arm is released.

We have replaced the "Intelligent" control module situated behind the bank of relays on the N/S inner wing.............no difference.

We are aware that the Hella relays situated in a bank close by, i.e. on the N/S inner wing can allow water ingress over time BUT...........has anybody else had this problem and, if so, to what cause was the problem traced?

We are about to embark on fitting a SNG Barratt quad-headlight conversion, but don't want to introduce any variables until the original issue is sorted.

All donations gratefully received.............in terms of info, of course!

Memo to Cubist and R2E......hanging a hat on the operating arm does not seem to make any difference......see other thread elsewhere.

Carole Simpson-Hadley · July 26, 2018

20 hours ago, R2e said:

Presumably the XJS is not your home? (Warning - possibly obscure reference!)

Good morning Ron, what a surprise that you got in first!!!! Reference the quote above................aw, you'll have to do better than that. Knowing that you are of a musical bent, the obscure reference has to be a recall from your YOUNGer days............

Meanwhile, we are still puzzling over the headlight issue, although we have discovered that the Hella relays sat on a bank of 5 on the N/S inner wing are known to not be resistant to moisture; we shall change each one in turn to later Jag/Barratt modified and see what that produces. Ably assisted, of course, by Claude with his full set of King Richard spanners (note deference to the moderator).

As we wade through the wiring diagram, we remind ourselves that there is always hope in a hopeless world and we can usually iron out the rough spots.............further obscure reference. Pay attention at the back.