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Posted on Mar 06, 2010
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I have no brake lights. I found a 20 amp fuse

I have no brake lights. I found a 20 amp fuse that was blown but don't know if that's the right one or not. Put a different 20 amp in and it blew instantly. What could be doing this? I realize there's a short or a hot wire touching a ground but where should I start looking? I guess I'm gonna need a large box of 20 amp fuses before I'm done.

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  • Master 1,056 Answers
  • Posted on Mar 06, 2010
Anonymous
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Joined: Jun 27, 2009
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First replace the fuse with a 12v light bulb. That way you don't waste money by blowing out fuses after another. Just keep the lightbulb in there while you look for the short. You start at the back. See which color wire is for the brake lights. You can also try unplugging the brake switch underneath. You will know if you had found the short because the light bulb will go out if you cut the power to the wire either by cutting or unplugging aconnector. Good luck. Ther is nothin wrong with cutting wires as long as you fix them back with good connection and well insulated with electrical tape or heatshrink tubing. Note that most shorts are caused by human error. For example rigging up things and not insulating the wires properly, or cross wiring something. Goodluck

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Brake lights on my 01 gmc sierra truck dont work but the tail lights, blinkers and emergency lights all work.

Could be the brake lamp switch is bad , stop lamp fuse 20 amp in under hood fuse box could be blown .Check the fuse ,if not blown check for B+ voltage at the brake switch , location - top of brake pedal under the dash . Do you know how to test automotive electrical circuit's using a DVOM - digital volt ohm meter ? Looking at a wiring diagram so you know which wires to test would be good too . Do you know what a wiring diagram is ? Free ones here http://www.bbbind.com/free-tsb Enter vehicle info. Year , make , model an engine size . Under system click on lighting ,then under subsystem click exterior lighting . Click the search button then the blue link. first diagram top left you will see the stop lamp switch . orange wire in is B+ voltage . Press the brake pedal while checking for B+ coming out on the white wire . No B+ coming out ,replace the switch . Will be other wires as well , other switch etc... check the right one .
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What size fuse for cig. lighter and brake light

CIG lighter usually 15 amp brake lights about 20 amp sounds like all fuse problem. Check owners manual for fuse number
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Okay here's my problem I have no manual and I have

If you cant find pic online (neither could I) try pulling each fuse out individually and looking at it... check this pic if you don't know how to visually inspect a fuse. Replace blown fuses with ones of the same amp value.. i.e. 15 w/ a 15, and 20 w/ a 20. You may lose the time in your dash or reset radio station presets by doing it this way, but its better than not having wipers or brake lights
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Dashboard lights not working and brake light also not working but all the other lights work

Check the fuse, the fuse must be in the main fuse box. The position and function of the fuses is normally marked on the inside of the fuse box cover and also in the owner's handbook. If you don't come right with these, work your way through the fuses looking for a blown one. To ease your search for the required, fuse it should be around 20 amps.
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1992 lincol town car,no rear lights or brake lites, only turn signal and hazard lights work, front lights fine. And about the same time instrument cluster light went out.

The Park Lamps and Instrument Panel illumination lamps are controlled by the lighting control module. The problem could be either the headlamp switch or the Lighting control module. Most likely, the head lamp switch.
The most likely cause of the brake lamps not working would be a failed Brake Pedal Position (BPP) switch. It could also be caused by the multifunction switch. To find out if it is the BPP, check for power at the BPP switch. One terminal has a Light Green and Red (LG/R) wire and the other has a Plain Light Green (LT GN) wire. The LG/R wire should be hot at all times. The LT GN wire should be hot only when the pedal is pressed down.

If there is no power at all, there is probably a blown fuse at fuse #10 (20 Amp) in the Central Junction Box (CJB) located uder the left side of the dash. If this fuse is blown, you have a short circuit between the CJB and the BPP switch.

If there is power only on the LG/R wire even with the pedal pressed, then replace the BPP switch.

If there is power on both sides of the BPP then check fuses #20 (7.5 Amp) and #22 (20 Amp) also locatedin the CJB.

If fuse #20 is blown, you have a short between the BPP and the Lighting Control Module. If fuse #22 is blown, you could have a short anywhere from the BPP through the Multifunction Switch all the way back to the brake lamps themselves.

The Brake lamps, Turn Signals, and Park Lamps all share the same ground, so if the Turn Signals are working, it is not likely a ground problem.

Please also review this article: Where's The Fuse?
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Abslight stays on no brake lights

Fuse 12 (10 Amps) may be burned out. Its located in "Junction Block". Losing
fuse 12 would kill the ABS systems and light the ABS dashboard light.

Fuse 11 (20 Amps) may be out. Its located in "Power Distribution Center". Losing fuse 11
would kill the brake lights, and light the ABS dashboard light. If fuse 11 is blown,
check your (3) brake light sockets for shorts of any type, or fuse 11 will just blow again.

Here's your ABS Indicator Light wiring diagram:

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My daughters 1998 vw cabrio has a top that won't go up or down. i need to find the fuse for it. i know it's not the motor or hydrylics i have already checked those out. so that leaves the button or the...

"my daughters 1998 vw cabrio has a top that won\'t go up or down. i need to find the fuse for it. i know it\'s not the motor or hydrylics i have already checked those out. so that leaves the button or the fuse... but i don\'t have a diagram for the fuse box. Please help. "

Here's the list and link for the fuse locations.

Fuse/Relay Locations on 1996 VW Cabrio.

Fuses, left to right:
1. Head light, low beam, left
2. Head light, low beam, right
3. Instrument & License plate lights
4. Glove box light
5. Wiper/washer
6. Fresh air fan
7. Tail light & side marker, right
8. Tail light & side marker, left
9. Rear window defogger
10. Fog lights
11. High beam & indicator, left
12. High beam, right
13. Horn
14. Backup lights
15. Open
16. Dash warning lights
17. Emergency flasher & turn signals
18. Fuel pump
19. Radiator fan & AC
20. Brake lights & cruise control
21. Interior lights & digital clock
22. Radio & cigarette lighter

Relays

1. AC
2. Rear window wiper
3. Digilant control unit
4. Load Reduction
5. Open
6. Emergency flasher
7. Fog lights
8. Intermittent wiper
9. Seat belt warning
10. Open
11. Horn
12. Fuel pump
13. Radiator cooling fan
14. Starting interlock
15. Open
16. Open
17. Open
18. Daytime running lights
19. Auto trans
20. Open
21. AC & power seats
22. Power windows
Google Image Result for http://www.2carpros.com/forum/automotive_pictures/266999_cab_1.jpg

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All the running lights work minus the rear tail lights but the brake lights work and the bulbs look good

I have a f-250 super duty,2001, dash& running lights don,t work, found a 15 amp fuse blown in engine compartment. fuse,s keep blowing. please help.
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Need fuse box pannel to see what fuse is what

FUSE USAGE

1. 10 AMP LOW BEAM-LEFT
2. 10 AMP LOW BEAM-RIGHT
3. 30 AMP BRKR POWER WDO/SUNROOF
4. 30 AMP BRKR PWR ACSRY
5. 20 AMP BRKR LIGHNG CONTROL MODULE
6. 15 AMP IGN/REM ACSRY CONT/INST CSTR
7. 10 AMP SUPPLEMENTAL INFLATABLE RST
8. 20 AMP CORNERING LPS/TURN SIG
9. 10 AMP CRANK SIGNAL-SIR
10. 20 AMP TRK REL/FUEL FILL REL/BACK-UP LPS
11. 15 AMP BAT/RADIO/PWR ANT/CIG LGTR/ INST CSTR
12. 20 AMP ELECTRONIC LEVEL CONTROL
13. 20 AMP BRAKE & HAZARD LAMPS
14. 15 AMP PARK LAMPS
15. 15 AMP COURTESY LPS/PWR MIRRORS
16. 10 AMP COOLING FAN
17. 25 AMP HEATING/AIR CONDITIONING (C67)
18. 15 AMP A/C AUTOMATIC ELECTRONIC (CJ2)
19. 10 AMP ANTILOCK BRAKES
20. 10 AMP LOW COOLANT/LAMP MONITOR
21. 10 AMP IP LIGHTS
22. 10 AMP HI BEAM-RIGHT
23. 10 AMP HI BEAM-LEFT
24 10 AMP IGNITION/RADIO
25 25 AMP WIPER/WASHER

FOR ACCESS TO ADDITIONAL FUSES
REMOVE RIHT SOUND INSULATOR
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