The HMSL on my '94 would work the first few times the brakes were applied but would then cease working until the car had been shut down for several hours due to dodgy solder joints on the board inside the relay module. Removed the board and touched up the solder joints where the relay (one of four inside the module) is mounted to the board. Worked for a while then intermittent operation recurred. Repeated the process with same result. The third time I had the module out and apart I touched up all the solder joints and knock on wood it has worked properly since. Definitely worth trying.
Mike Stone
1994 XJ6/XJ40
160,XXX miles
Springfield, Missouri USASent via Palm Centro� “Yesterday’s Technology Today”
-----Original Message-----
From: “Bryan N” sophistic@btopenworld.com
Subj: Re: [xj40] 94 XJ40 High Mounted Stop Lamp
Date: Thu Oct 25, 2012 2:50 pm
Size: 1K
To: xj40@jag-lovers.org
In reply to a message from vkv884j sent Wed 24 Oct 2012:
According to the circuit diagrams for a '94 model, the high
mounted stop light is powered from Relay Module ‘L’ which is
located behind the carpet trim panel in the front right
corner of the trunk forward of the radio antenna. Relay
Module ‘L’ (DBC10422) has a 20-way black connector. Along
side it should be another Relay Module ‘K’ which has a blue
connector (for the HRW and antenna)
I assume that the Green/black wire from that Relay Module
feeds straight in to the cabin and up to the stop light unit
so you won’t see that in the trunk. However, the Black
ground wire from the stop light unit travels in the reverse
direction out of the cabin through the trunk to a ground
point on the trunk floor immediately below the right rear
Bulb Fail Module on the side of the trunk just forward of
the right rear lamp cluster.
The original message included these comments:
My high mounted stop lamp is not working. There is no
voltage at the bulb sockets. The JHM1153 CD shows the lamp
relay module above the right wheel well. Actually it shows
2 modules, but there is only one existing. Wire colour at
the lamp assembly is green/black and black. I can’t find
these wires anywhere in the boot.
Does anyone have a clue where the relay may really be?
–
Bryan N, '91 Sovereign 4.0 L, RHD
Cambridgeshire, United Kingdom
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