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Why do the brake lights go out when brake is applied and headlights are on but brake light works when headlights are off?
Wiki User
∙ 10y ago
just repaired same problem on 97 gmc van...checked all wires for bad grounds..thoughly cleaned sockets....i had a hair pulling intermitent situation...
answer was to replace short rear harnesses ,,,evidently the interior ofplastic lite sockets degraded... arcing from the extra load of the other lites go on.
ps.... chevy wanted $180 per harness...got them online for $23...30 min installation, exact match connectors
trust me just do it!
Wiki User
∙ 10y ago
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Which lights are the brake lights and which lights are the fog lights?
Fog lights are in the front; they are commonly referred to as "brights" because they are the brighter of the two standard headlights. Brake lights are in the rear; they light up when pressure is applied to the brakes or when the car is in park or reverse.
Brake lights don't work when the brake is pushed. Work with headlights on only.?
The brake lights and the tail lights are separate circuits. Check the brake light fuse, then check the brake light bulbs, then check the brake light switch.
When you turn the headlights on to your 99 Saturn my brake lights do not light?
Check the ground wire to the tail lights.
Why do brake lights stay on when you turn headlights on on your Astra?
the brake lights are on a separate cuircut,if your brake lights are staying then it will be a fault with the brake light switch. the switch is located under dash,and will be on or very close to brake pedal.
What could you check if your drivers side brake light works when headlights are off but not when on?
The ground for the brake lamp. When the tail lights are off, the tail light circuit can act as a ground for the brake light. When the tail lights are on, it can't.
Why would my 97 mercury villager brake lights not work but dash and tail light come on when braking?
I would check the rear bulbs. I just had this issue and it ended up my brother had used the wrong bulb, and odd enough it caused the brake lights to stay on with headlights. When headlights were not on and you applied the brakes the dash would light and brake lights worked. Strange, HUH? I must admit before this revelation, I replaced headlight switch and brake switch, with no avail.
Why do brakelights go off on when the head lights are switched on?
Brake lights should NOT be effected by the headlights. Brake light function is completely independent of the headlights. Assuming you are not refering to the tail lights, or marker lights, which are supposed to come when the head lights are turned on. Not having brake lights when the head lights are on is a big safety problem and should be corrected.
Where are all the brake light grounds on 1990 sundance when the headlights are off then brake lights are fine but when u turn headlights on then the brake lights don't work except the cyclops lights.?
You probably have a loose wire connection in the brake light sockets. Insert a nail or probe tip into the back of the light socket where the wires are inserted and test the brake lights. (The socket can appear perfectly normal and the wires may even seem well attached.)
Why on your 93 s10 blazer do your brake lights not work with the headlights on and with them off if you push the brake the brake lights work but the front left parking light comes on as well?
The head light switch is shorting out ,or a bad connection
Why on a 98 Chevy express do the brake lights go out when headlights are and brake pressed but window brake light works if headlights are off they work?
Check the bulbs one of the 2 filaments may be burned out
When i turn the headlights on all the lights are on but when i push the brakes the rear lights wont bright up.?
Sounds like the brake light switch is defective.Sounds like the brake light switch is defective.
What causes the brake lights on when headlights are on in Toyota Previa 94?
you have bad contact in ground cable of the brake lights You might also like to check that there has not been a bulb replacement lately that uses a single contact in a double contact socket. This would have the effect of shorting the brake and tail light inputs and thus turn on ALL lights when brakes are applied or the parking lights turned on.
