Question about 1992 Oldsmobile Cutlass Supreme

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Rear brake lights

My rear brake lights won't turn off, unless I pull the fuse. Can anyone shed some light, forgive the pun.

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There's a switch on the brake pedal that controls the brake lights, it may need to be adjusted or replaced.

Posted on Apr 23, 2015

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  • Master
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Brake switch sticking or out of adj. disconect the switch lights should go out

Posted on Sep 19, 2008

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2 Answers

On the fuse chart, what is the abbreviation for the brake light fuse


Should all be the same fuze. Check the bulbs and whether the harness to the rear lights that usually runs through the trunk hasn't been pulled.

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There are three fuses involved.
There is a 25 amp fuse before the brake switch located in the fuse box under the hood. Then there are two 15amp fuses after the brake switch in the box inside the cabin. One is for the lower brake lights and the other is for the high mount light and the trailer connector.
You would need to know if the 15amp fuse for the lower lights has power when the brake pedal switch is applied.

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No brake lights


Amen to that! Find a good independent mechanic or garage and try to keep them. Both the turn signals and the brake lights are fused circuits, so check the fuses for both at the fuse panel, probably under driver's dash. There is also a brake light switch at top of brake pedal-if you have a test light, you could check for power at the switch, and for power leaving the switch when pedal is pushed down. From there, the brake light signal travels to the rear brake lights, lighting the bulbs, and then to a ground source. Do you see any hanging wires at the rear of truck? Anything look amiss with the wires going to the light fixtures? If any wires got broken, likely at the rear of truck. Are the tail lights good? If they are good, I think the brakes and turns would share the same ground with the park lights, but if all are out, it could be a ground problem for the rear lights. All of these wires going to rear would be in a single harness.
You could have a bad turn signal switch, since the brake light circuit is routed through the turn signal switch.
If you could, have a mechanic or someone check the turn switch and brake lights.
Good luck.

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1 Answer

2003 gmc envoy rear lights won't turn off


As for the brake lights i would think that the brake light switch is faulty.As for the parking lights i think that the parking light relay is sticking.Switch the relay with another one in the fuse panel with the same part number to see if thats the problem or not.

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2002 Chevy Trailblazer Brake lights failure. All Three Breaklights will not illuminate when pedal is depressed. They will work when hazards are on, blinkers, etc. Main fuse under hood is good, bulbs work,...


Well, lets try this, if you have a trailer connector tapped into the tail lights check that for a grounded wire. If a wire has grounded or come free from the splices they won't work.

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Rear turn signals and brake lights out. Front signals and rear tail lights work fine.


the brake lights and the rear turn signals should be the same bulb check the bulbs to make sure they are not blown does your third brake light work if all brake light are out and the bulbs are good check the brake light switch on the brake pedal

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2 Answers

Brake lights not working


Having the sa but haven't replaces the brake switch. The owner's manual for my 99 accord indicates the the fuse is located behind a panel that is viewable when you open the door on the driver's side. There is a panel that you remove (pull off) to expose the fuses. The brake light fuse is the third one from the top on the left. 7.5 A

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1 Answer

Brake lights


pull the brake pedal up and see if they turn off if they do your brake switch is bad and need a new one but if they not unplug the brake swict located above the brake pedal and if they turn of it is the switch

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