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The warning light on the dash that indicates a headlight, running light, or brake light is out comes on and all of the bulbs are ok. Is there a relay that could be bad?
Re: The warning light on the dash that indicates a...
There is a bulb failure relay under the dash that sometimes fails. It is a red round cylinder shaped relay that should be just behind the steering wheel.
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The instrument cluster (10849) carries out a display proveout to verify that all warning/indicator lamps and monitored systems are functioning correctly. When the ignition switch (11572) is in the ON position with the engine (6007) off, the following indicators will illuminate:
CHECK ENGINE/malfunction indicator lamp (MIL).
CHECK GAGE warning indicator.
Charge system warning indicator.
Anti-lock brake warning indicator (ABS).
Safety belt warning indicator (60second proveout).
Air bag indicator.
An indicator is inoperative - CHECK ENGINE/malfunction indicator lamp (MIL)
you have a ground falt to the light or possibley you have a ground to the brake light switch chek them if ok then you need to check the headlight switch for a ground worse case you may need to pull the dash to see if you have a falulty bulb circut to the dash lights check all wires from the head light switch and break light switch it has to be in the headlight switch or brake light switch
you might have an open ground wire on your brake/tail lights .. when you apply the brakes then power would flow thru the brake light (not see ground) so would then provide power backwards thru the parking light (common ground open) to all the other things connected to the parking lights .. like the other parking lights and dash ... when you turn power on to those things (headlights on) then there is 12 volts on both sides of the light .. thats why the lights quit working ... if the missing ground is the problem then most of the lights that are improperly turning on should be at a lowered brightness level.. interesting problem .. its also possible to have a brake light bulb that has the common ground open inside or not making connection with its socket .. i would start by removing the brake lamps and see if the problem goes away .. if it does look for a broken ground or damaged lamp ..
This warning light should indicate that there is a rear light failure. Running lights, brake lights, signal lights, reverse lights. You should check all the bulbs to see if any are burnt out.
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