Question about 1999 Chevrolet Silverado 1500

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98 Chevy pickup brake lights just stopped working has 2 separate fuses both are fine One relay labeled brake it tests OK Stop light switch replaced Rest of the tail lights work fine What else could B?

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  • cruncher63 Jun 17, 2009

    As I said in the original post, the brake light switch has been replaced Turns out it was the turn signal switch

  •  Chris Bornholdt
    Chris Bornholdt Feb 02, 2012

    I had the same problem with my sons truck. It ended up being the wiring harness between the brake pedal switch and the main harness under the dash. Out of the six wires four of them were broken clear off. I had already replaced all of the brake parts beofre finding the problem. Chris



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Have you tried to find the brake pedal switch? follow the brake pedal under the dash and there should be a switch that the brake pedal presses to activate the lights when you push it in . if everything else has been checked then I suspect that the switch has moved enough to not work or it may be just bad. let me know if this was it.... hope this works

Posted on Jun 17, 2009

  • emirita_87 May 23, 2011

    Same thing w/ my truck. Changed all bulbs, checked all fuses and relays and replaced turn signal assembly and brake pedal switch. Brake relay under hood still clicks when pedal depressed and the lights come on then turn off the further you push on brake pedal. HELP!



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96 s-10 4.3vortec vin x no brake lights...all other lights work...bulbs ok...Is there another fuse somewhere besides 2 in fuse box? Brake switch ok also.

The only applicable fuse is 20A STOP HAZ FUSE 1. The STOP LAMP RELAY or the TURN-HAZARD SWITCH (multifunction switch) could be defective.

Jun 28, 2017 | Cars & Trucks

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I have a 2001 chevy s-10 pickup that the brake lights will not go out. Brake light on cab works OK. other brake lights stay on all the time, even with engine off and key removed. Only way to get them...

Disconnect the BRAKE PEDAL POSITION Switch.
IF the lights go out.
Replace the switch.
IF not.
Check the HAZARD switch. push. ON and OFF.
Chack if you have intermitent lights.
If you Don't have, your problem is the multifuntion switch.
BUT do this test with brake switch off.

OK> I hope this can be useful on your problem.

Jul 24, 2008 | Chevrolet S 10 Cars & Trucks

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2 out of 3 brake lights dont work

If any light lights up when you apply brakes, then the brake switch is ok. The problem could be a fuse and/or a relay. or the bulbs. Those bulbs are dual filament so one filament could be bad, for stop or tail lights.

Oct 02, 2012 | 2002 GMC Envoy XL

1 Answer

Chevy cavalier - rear brake lights don't work. The center rear brake light does work as well as all other lights. Replaced the bulbs and fuse - no luck. From what I have been told, the turn signal...

Stop Lamp Circuit Description
The STOP HAZ fuse in the IP junction block supplies battery positive voltage to the normally open stop lamp switch. When the driver presses the brake pedal, the switch contacts close and battery positive voltage is supplied to the center mounted stop lamp (CHMSL) and both left and right stop lamp assemblies. The left stop lamp is grounded at G304 and the right stop lamp is grounded at G304.

Check the ground ! Testing an not guessing is the way to find the problem . Do you know how to test automotive electrical systems an circuits using a DVOM - digital volt ohm meter ? How to use an read a wiring diagram to pin point testing areas in a wiring harness ?
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Stop Lamps Inoperative

Inspect the 20 Amp STOP HAZ fuse.
Is the STOP HAZ fuse open?
YES - Go to Step 11
NO - Go to Step 3
Use a test lamp in order to backprobe connector C1 of the brake switch connector between terminal A and ground. Refer to Circuit Testing in Wiring Systems.
Does the test lamp light?
YES - Go to Step 4
NO - Go to Step 5
With the brake switch closed, Test for positive battery voltage at terminal B of connector C1. Refer to Circuit Testing in Wiring Systems.
Is voltage present?
YES - Go to Step 6
NO - Go to Step 7
Repair the open or short to ground in the Fuse Output-Battery between the fuse block and the brake switch. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
YES - System OK
Use a test lamp in order to backprobe the turn/hazard headlamp switch assembly connector C2 terminal A and ground.
Depress the brake pedal.
Does the test lamp light?
YES - Go to Step 8
NO - Go to Step 9
Inspect the adjustment of the brake switch. If the adjustment is correct, replace the brake switch.
Is the repair complete?
YES - System OK
Replace the turn/hazard headlamp switch assembly.
Is the repair complete?
System OK
Repair the open in Stop Lamp Switch Output between the brake switch and the turn/hazard headlamp switch assembly. Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
System OK
With brake switch open test terminal A of the brake switch for continuity to ground. Refer to Circuit Testing in Wiring Systems.
Is ground present?
YES - Go to Step 11
NO - Go to Step 12
Repair short to ground in Fuse Output-Battery Circuit. Refer to Wiring Repairs in Wiring Systems.
Is repair complete?
System OK
Test the Stop Lamp Switch Output Circuit for continuity to ground. Refer to Circuit Testing in Wiring Systems.
Is ground present?
YES - Go to Step 13
NO - Go to Step 14
Repair short to ground in the Stop Lamp Switch Output Circuit. Refer to Wiring Repairs in Wiring Systems.
Is repair complete?
System OK
Test terminals F,G,B and C on the Hazard Warning Switch for continuity to ground. Refer to Circuit Testing in Wiring Systems.
Is ground present?
Go to Step 15
Repair short to ground in suspect CKT. Refer to Wiring Repairs in Wiring Systems.
Is repair complete?
System OK

Jul 03, 2017 | 2000 Chevrolet Cavalier

2 Answers

I have a 2000 chevy 2500 and the tail lights, tag lights and brake lights have stopped working, I checked the bulbs and they are good, fuses are good. Have not replaced the brake relay under the hood. Do I...

check for power at the wires going intop the tail lights, real common that the circuit board is bad, but unlikely both at the same time. The tag, tail lights and brakes are 2 different systems. Do the turn signals work normally? if so the wiring from the turn signal switch to the brake lights is GOOD. the stop light switch had\s a ORANGE wire that should have 12V if not ck STOP LPS fuse, when brake pedal is depressed, the WHITE wire is 12V (at the stop light switch) if that is OK, the turn signal switch COULD be bad. The wiring harness plug is near the back left under the tailgate, see if that is disconnected?

Aug 04, 2011 | 1999 Chevrolet K2500

1 Answer

My 1996 chevy cavalier has no brake lights or blinker lights. I replaced the multifunction switch on the column and the brake stop switch. Still no brake or blinker lights. Third brake light doesn't work...

take a volt meter to the sockets and see if you get any voltage. if you don't, try a continuity test on the socket and see if there are any shorts, blown fuses are good indications of shorts. if you have no voltage and no shorts, you have cut wires somewhere along the lines. i'd say check your relays but if your not getting any voltage at all, it probably won't be relays. check it anyway
hope it helps

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2 Answers

Need a wiring diagram for a chevy s10. brake

your power starts at the brake light fuse,check with a test light,then proceed to stop light switch on brake pedal under dash,one wire will be hot when when you check it with your test light, the other won't be until you press down the brake pedal then the power flows through to the second wire,if no power to second wire replace switch,if you have power remove tail light bulbs and check for power in side socket.

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3 Answers

The brake lights are not working

could be the wiring connection. i'm sure the three lights came from the same line from the brake switch. so if the third light is coming on, then the connection where they separated should be tyraced. or the ground of the side lights could be missing,. check the ground wire of the side lights for proper grounding.

tnx 4 using fixya,


Nov 04, 2008 | 1999 Dodge Caravan

3 Answers

No brake lights

First Start with the Stop lights fuse Check and make sure it's good if questionable just replace it. Check to make sure you have power going into the fuse Use a 12V test light or volt meter. If you have power going into the fuse make sure the other side of the fuse has power through the fuse. Next Go to the brake light switch and test for power going into the switch if you have power put your tester on the other wire on the brake light switch and press the brake pedal, If there is power the switch is good and if not the switch is either out of adjustment or bad.
If you have power in and out of the brake light switch with the brake pedal pressed then you have to find the breadk in the wire back to the lights Oh don't forget the bulbs and the grounds for the bulbs.

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