Bulb Out Warning Light
#1
Bulb Out Warning Light
My 1995 XJS lights the 'Bulb Out' warning light whenever I turn on my lights (Parking or head lights). All bulbs do light up, I think, and the wiring diagram suggests that only the running (parking) lights, turn signal bulbs and brake lights are monitored.
I need your advice on what else to look for or do. Replace bulbs with new ones to compensate for increased resistance that comes with age? Clean all bulb sockets?
Thanks in advance for your help.
I need your advice on what else to look for or do. Replace bulbs with new ones to compensate for increased resistance that comes with age? Clean all bulb sockets?
Thanks in advance for your help.
#2
Join Date: Mar 2008
Location: Pacific Northwest USA
Posts: 24,920
Received 10,979 Likes
on
7,211 Posts
Near as I can tell there are 5 bulb failure units: one for brake lights, and then 4 units for parklamps, marker lamps, license lamps, etc.
Not sure about the brake light BFU but the others are a bi-metal switch type of thing. The switch is closed (warning light on) until the current flow heats the switch and opens the circuit.
The brake light BFU might be solid state. Not sure.
Anyhow, I'd unplug the white/slate wire from the four bi-metal BFUs one at a time and see what happens. If the dashboard warning light goes out then you've at least isolated the problem somewhat.
I need your advice on what else to look for or do. Replace bulbs with new ones to compensate for increased resistance that comes with age? Clean all bulb sockets?
Thanks in advance for your help.
Thanks in advance for your help.
Good to clean sockets etc on general principles.
Cheers
DD
#3
On my 1985 (and all pre-facelifts AFAIK) the bulb out warning light is meant to come on when the lights are turned on. It stays on for about 30 - 45 seconds and then goes out. This is intentional and part of the system design.
Does yours stay on for good? As it is a facelift, I do not know if the same start-up system has been kept.
Greg
Does yours stay on for good? As it is a facelift, I do not know if the same start-up system has been kept.
Greg
#4
#5
#7
Bulb Out Warning
My warning light comes on as soon as I turn on the lights and stays on. I will begin disconnecting the 'bulb out' modules as suggested to see if I can isolate the problem and also clean all the sockets. I did not check the license plate bulbs, so possibly, if they are monitored, could be the problem. I will post with progress.
Thanks to all.
Thanks to all.
Trending Topics
Thread
Thread Starter
Forum
Replies
Last Post
99xk8guy
XK8 / XKR ( X100 )
11
06-05-2023 06:28 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)