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Left and right rear turn, and brake signals stopped working. Bulbs are good.

1997 olds bravada

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  • Cars & Trucks Master
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It sounds like a blown fuse.

Posted on Apr 16, 2015

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Posted on Jan 02, 2017

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Which fuse is for the brake lights on a 2000 olds bravada? how is it labeled?


During stoplamp operation, power is supplied from the STOP LP fuse in the underhood fuse block through CKT 1540 (ORN) to the TCC/stop lamp switch. When the brake is depressed, the contacts of the TCC/stop lamp switch close, routing power to CKT 17 (WHT). CKT 17 supplies power to both the VECHMSL fuse and the stop switch contact of the hazard switch. From the VECHMSL fuse, current flows through CKT 1320 (LT BLU) to the high mount stoplamp and high mount stoplamp resistor. The ground is provided by G450 through CKT 1350 (BLK). From the stop switch contacts of the hazard switch, current flows through the turn signal switch to CKT 1418 (YEL/BLK) and CKT 1419 (DK GRN/WHT). CKT 1418 (YEL/BLK) supplies power to the LT TRN (rear) fuse (which feeds the LH rear park and turn signal lamp terminal A) through CKT 618 (YEL). Ground is provided by CKT 1350 (BLK) to G450. CKT 1419 (GRN/WHT) supplies power to the RT TRN (rear) fuse (which feeds the RH rear park and turn signal lamp terminal A) through CKT 619 (DK GRN). Ground is provided by CKT 1350 (BLK) to G450. When the left or right turn signal is turned ON, the appropriate turn signal will flash. The opposite side will remain ON in order to serve as a stoplamp when the brakes are applied.

Sep 29, 2017 | 2000 Oldsmobile Bravada

1 Answer

08 Buick lucerne cxl. Third brake light works as well as front signal lights. No rear brake lights or turn signals. Tail lights and headlights and third brake lights works. Bulbs good. Help


Stop Lamps
The brake pedal position sensor is used to sense the action of the driver application of the brake pedal. The body control module (BCM) provides a 5-volt reference voltage and low reference to the brake pedal position sensor. The position sensor provides an analog voltage signal back to the BCM that will increase as the brake pedal is applied. When the brake is applied, the BCM will then apply battery voltage to the left and right stop/turn signal lamp supply voltage circuits and the center high mounted stop lamp (CHMSL) supply voltage circuit illuminating the stop lamps. At the same time the BCM applies battery voltage through the signal circuit to the transmission control module (TCM) and the engine control module (ECM) indicating that the brakes are applied.
Ground for the stop lamps is supplied as follows:
• G402 provides ground for the left rear stop/tail/turn signal lamps
• G403 provides ground for the right rear stop/tail/turn signal lamps
• G301 provides ground for the CHMSL
The stop lamps on this vehicle will not illuminate unless the ignition is in the accessory, run, or crank positions. When the ignition is in the OFF position the stop lamps will not illuminate when the brake pedal is applied.
Battery voltage from the LT TRN/SIG and RT TRN/SIG fuses located in the rear fuse block is also used by the body control module (BCM) for stop lamp operation.

Turn Signal Lamps
Battery voltage supplied to the body control module (BCM) from the fuses listed below is used for turn signal and hazard lamp operation.
• LT TRN/SIG fuse for the left turn signals
• CTSY/RF TRN fuse for the right front turn signal
• RR TRN/SIG fuse for the right rear turn signal
When the turn signal switch is place in either the LEFT or RIGHT position, ground from G300 is applied through the turn signal switch signal circuit to the BCM indicating the turn signal request. In response to this signal, the BCM applies a pulsating voltage to the front and rear turn signal lamps supply voltage circuits cycling the lamps ON and OFF. At the same time the BCM sends a GMLAN serial data message to the instrument panel cluster (IPC) to cycle the appropriate turn signal indicator ON and OFF.
Ground for the turn signal lamps is supplied as follows:
• G104 provides ground for the left and right front turn signal lamps
• G402 provides ground for the left rear stop/tail/turn signal lamps
• G403 provides ground for the right rear stop/tail/turn signal lamps

Do you have a factory scan tool (tech2) ? Your best bet , take it to the dealer .

Sep 08, 2017 | Buick Cars & Trucks

5 Answers

98 chevy lumina Rear window break light works, but rear break lights don't, also right turn don't work?


I can almost 100% guaranty the turn signal switch is the problem. Power for the brake lights starts at the brake switch. power then splits from there and the third brake light gets power directly from the brake switch. Since the turn signal and the brake lights are on the same bulb power for the brake lights is routed through the turn signal switch. the switch depending on what position it is in will allow brake power or turn signal power to there respective left or right brake/turn bulbs.

If you hold your foot on the brake pedal and wiggle the turn signal and or play with the hazard switch the brake lights will almost always intermittently start to work. this will confirm a bad turn signal switch which is pretty common on GM vehicle with this style setup.

Apr 05, 2013 | 1998 Chevrolet Lumina

1 Answer

1998 chevy lumina: rear window brake light not working, left brake light not working, rear left turn signal not working


See if bulbs have burnt out in the left brake light and rear turn signal (one bulb if combined) and also rear center high mount brake light.

If the left turn signal has a slower speed than the right turn signal, this is a symptom of a bulb or bulbs burnt out.

Usually, the wiring is not a problem, but I would not rule wiring (or sockets) as a problem out.

Good luck on this repair.

Jan 19, 2011 | 1998 Chevrolet Lumina

1 Answer

When I turn on turn signals (left or right it


sounds like one of the circuit bords at taillights is bad

Aug 03, 2009 | 1996 Chevrolet Tahoe

1 Answer

2005 Canyon turn signal problem


No, but that's probably where your problem is. The wires get the hell beat out of them by stones, and then they short out and cause problems. I would take a look at it.

May 06, 2009 | 2005 GMC Canyon

2 Answers

I have a 1997 lincoln mark viii lsc has no tail lights no left turn signal, no left brake light. Right turn signal and brake light work fine. New multi-function switch (no fix) bulbs fine. Any ideas would...


inspect all of the sockets that the bulbs plug into. you may have a short in some of them. they can get hot and melt the plastic sockets. causing the bulbs not to work. or try replacing the wiring harness for all the rear lights. i found one in the junkyard for my cougar. and it works fine now, good luck

Mar 09, 2009 | 1997 Lincoln Mark VIII

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