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Turn switch on power lights come on when you turn thermostat up power goes out

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2 Answers

Brake lights?


Year make and model ?
Did you check for power at the brake light switch ?

Feb 19, 2015 | Cars & Trucks

1 Answer

Adjust brake light switch


The brake light wire leaves the brake switch and goes into the turn signal switch. They often share the same wire: the rear turn signals and the brake lights. When turning, that side is routed through the turn flasher, but you get a steady brake light on the other side.
So you have power to the brake switch. Pull apart the connector for the turn signal switch, and see if you have power in on the brake wire (with brake depressed of course) going into the turn switch. If you have power in, plug the connector together, and see if you can backprobe the connector with test light or voltmeter, looking for power out to the rear brake lights. If power in, but no power out, the turn switch is probably bad.

Dec 31, 2013 | Ford E-150 Cars & Trucks

1 Answer

89 Chevy 1500. Break lights and rear turn signals quit working ... I'm clueless. Help?


Since power from the brake light switch goes thru the turn signal switch, have you checked the turn signal switch for power in and out on each circuit ?

Jun 01, 2013 | Cars & Trucks

1 Answer

No brake lights or turn signals


Do you have power in and out of the brake and turn signal switches ?
Power goes into the brake switch, then to the turn signal switch, then to the light bulbs.

May 12, 2013 | 1999 Ford Expedition

1 Answer

95 mustange gt brake light dont work check #9 fuses change all bulbs replaced switch on brake pedal hazards lights works ,parking or running lights works,turning signal lights works,what other places i...


I assume the fuse has power if the hazards work.
The third brake light skips the turn signal switch, the regular brake light circuit goes thru the turn signal switch.
Do you have power going into the turn signal switch on the red lite green wire from the brake switch ?

Feb 17, 2013 | 1995 Ford Mustang

1 Answer

My dashboard and rear lights don't work


Assuming this has the V6, the 15A PARK LPS fuse in the underhood fuse block feeds constant power to the auto park lamp relay. When the relay closes, 12V power passes through the 10A INST LPS fuse in the right instrument panel fuse block to the panel dimmer switch and then to the five instrument cluster lamps.

If by "rear lights" you mean everything in the rear lamp assemblies, power for the tail lights (running lights) starts at the 15A PARKLAMP fuse in the underhood junction block, passes through the automatic lamp control (ALC) relay and the right instrument panel junction block to the tail filament of the dual stop/tail lamp and the separate tail lamp on each side. The 12 V power for the stop lamps is protected by the 20A STOPLAMPS fuse in the left I/P junction block, passes through the stoplamp switch when brakes are applied, stop filament of the dual stop/tail lamps. That leaves the turn signals and the hazard lamps. Power for the turn signals originates at the 10A TURNLAMPS fuse in the left I/P junction block and is applied to the hazard switch. Switch output goes to the turn/headlamp/wiper switch for selection of left or right turn signals. That switch output goes to the turn lamp. Power for the hazard function begins at the 10A HAZRD LPS fuse in the left I/P junction box and goes to the hazard switch. Switch output is sent to the left I/P junction box to make the turn signals flash. That's it. Post a comment if you need more information.

Sep 15, 2012 | 2002 Oldsmobile Alero

1 Answer

Iv got an 88 F150 4x4 iv got turn signals light fuse is good got power at break switch need no break lights and is there suppost 2 b 1 r 2 wires coming out of fuse box


Do you have power at both sides of the brake switch when the brake is applied? If so it sounds like the turn signal switch is bad. try turning on and off the 4 ways a few times. sometimes this will clean the connections and it will start working.
The power goes through the fuse to the brake switch. from the brake switch to the turn signal switch from the turn signal switch to the tail lights. If the 4 ways are on the power goes through the 4 way fuse to the 4 way flashers then to both sides.
If the turn signal is on and the brake is on, the turn switch cansles the power from the brake and uses power from a 3 fuse and flasher for the side that the turn signal is called for.
If I typed to fast let me know. I can answer any questions you might have.
If this helped you please vote 4 thumbs up. :-)
good Luck and God Bless

Jun 07, 2011 | 1988 Ford F 150

1 Answer

My brake lights are tied in to one wire to be connected to the brake light switch I guess. Where are the two wires from the brake light switch suppose to be connected


one wire is 12 volt power all the time weather the key is on or not, the other wire goes to the turn signal switch on most models, ( you did not give your year or model ) , if the car uses the rear turn signals as brake lights also then the wire goes threw the turn signal switch, if the car has a separate turn signal bulb in the rear ( usely has amber lens in the rear ) then the second wire from the brake light switch goes to the BCM ( body control module ) and the BCM turns the brake lights on.

Feb 03, 2011 | Chevrolet Chevy Cars & Trucks

2 Answers

96 monte carlo rear window brake light works but not brake lights. tail lights work, blinkers work, replaced brake switch and bulbs still not working


This is a common GM specific problem. Your turn signal switch contains an elaborate networking device that has to cancel brakelights while running a turn light. Often times the ground within the turn signal switch is lost causing your situation. After investigating such other possibilities as fuses and loose grounds it may become necessary to replace the turn signal switch. Thank you, Dana

Sep 21, 2009 | 1998 Chevrolet Monte Carlo

1 Answer

Checked all fuses-good, swapped bulbs-good, hazard lights-good, head lights good, turn signals-good but no brake lights. 1995 chevy silverado


Does the turn signals or hazards work in the rear?? Yes... it may be the brake switch or the turn signal switch (power goes from battery, to the brake switch then to the turn signal switch, then to the lights. No? .. again.. possibly turn signal switch or the wiring between cab and bed.

Jun 04, 2009 | 1996 Chevrolet K1500

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