99 civic coupe no brake lights
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99 civic coupe no brake lights
hello I’ve read a few threads but can’t seem to get my brake lights fixed. The fuse under the hood is good. The brake light switch is good I just replaced it. It seems I get power up until a plug on the driver side in the backseat behind the panel. So I jumped the wired around it with no results. As soon as I connect the wires I lose all power. But everything else works taillights, blinkers, hazards. I’m no electrician but does the wire losing power mean it’s broken somewhere or shorting out? I’m not sure what to do. thanks for any responses
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Re: 99 civic coupe no brake lights
Losing power generally indicates a poor connection/high resistance. Somewhere.
Connect everything, all wiring
Start at brake light switch, with pedal depressed, you should see 12v on both sides of switch.
Follow harness to next connector.....Backprobe rearward half of connector. If you have 12v then continue to next connector in the circuit....until you find where power is lost.
BUT if you checked the rearward half of the connector and found 12v missing, check same wire on the front half. If you have 12v on one side but not the other, open the plug and check why power was lost.
(you can actually start this checking at any connector along the circuit that is convenient and easily accessible---in the interest of speed and time---and decide which direction to go from that point, that's called splitting the circuit)
Remember, everything must be connected and powered up in order to make it act up and find a problem.
Brake light circuit includes:
There's a 20 cavity splice pack near the HVAC fan by the kick panel..
Another 20 cavity harness junction behind the drivers kick panel
Yet another 20 junction .....looks like in the area of the rear upper seatback side bolster behind the trim panel (near the door jamb switch)
Then to a 5 way splice, and then to the actual lights
Connect everything, all wiring
Start at brake light switch, with pedal depressed, you should see 12v on both sides of switch.
Follow harness to next connector.....Backprobe rearward half of connector. If you have 12v then continue to next connector in the circuit....until you find where power is lost.
BUT if you checked the rearward half of the connector and found 12v missing, check same wire on the front half. If you have 12v on one side but not the other, open the plug and check why power was lost.
(you can actually start this checking at any connector along the circuit that is convenient and easily accessible---in the interest of speed and time---and decide which direction to go from that point, that's called splitting the circuit)
Remember, everything must be connected and powered up in order to make it act up and find a problem.
Brake light circuit includes:
There's a 20 cavity splice pack near the HVAC fan by the kick panel..
Another 20 cavity harness junction behind the drivers kick panel
Yet another 20 junction .....looks like in the area of the rear upper seatback side bolster behind the trim panel (near the door jamb switch)
Then to a 5 way splice, and then to the actual lights
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I ran new wire from right before the wiring harness tested it and have power. As soon as I connect to any of the brake lights I lose power. I connected it to all the brakes still no power
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
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From: Midwest. Aiming about mid-chest
Rep Power: 518 Re: 99 civic coupe no brake lights
ALL wiring connected:
at brake light switch, with pedal depressed, you should measure 12v on both sides of switch.
Do you have that?
at brake light switch, with pedal depressed, you should measure 12v on both sides of switch.
Do you have that?
If you think a good mechanic is expensive, try hiring a bad one
Joined: Dec 2011
Posts: 32,017
Likes: 256
From: Midwest. Aiming about mid-chest
Rep Power: 518 Re: 99 civic coupe no brake lights
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