Brake lights wiring

[Birddog75]

I have been having intermittent issues with my passenger brake light/ turn signal. The drivers side works as normal. The passenger side has lights only. No blinker and no brake light. It’s not the bulb. I have removed the housing cleaned the ground. I have no power to the connection supplying the brake lights and blinker at the passenger housing. I need to start working my way back. I have found some good diagrams the shows the routing and connections of the wiring. I’m looking for help finding which color wire is what. I have a green, black/ red stripe, and all black. And similar colors feeding the drivers side light housing with the addition of a yellow wire. It’s all original wiring. Thanks.

 

[jmhend]

I have been having intermittent issues with my passenger brake light/ turn signal. The drivers side works as normal. The passenger side has lights only. No blinker and no brake light. It’s not the bulb. I have removed the housing cleaned the ground. I have no power to the connection supplying the brake lights and blinker at the passenger housing. I need to start working my way back. I have found some good diagrams the shows the routing and connections of the wiring. I’m looking for help finding which color wire is what. I have a green, black/ red stripe, and all black. And similar colors feeding the drivers side light housing with the addition of a yellow wire. It’s all original wiring. Thanks.

What about the wiring ground? I chased an electrical ground on my brake and turn signal for months because I thought I was all good.

Sent from my SM-N960U using Tapatalk

 

[Birddog75]

I did remove, clean, and reinstalled the ground wire attached to the body sheet metal behind the brake light housing. I also ground a voltage tester to the frame and still no power at the 2 prong connector. The drivers side does have power. I’m kind of thinking maybe the wire may be frayed or cracked as it runs from drivers to passenger side above the fuel tank. I will probably pull the wire tomorrow. I would like to know what wire the green one and maybe black/red or brown is. I’m sure one is brake light and the other is turn signal.

 

[TheLimeRanger]

there is a replacement tailight harness available not particularly pricy and the install isnt hard

 

[DirtDonk]

The separate ground wire behind the lamps is for the backup lamps only. The main ground is through the housing attachment screws to the body. Good to check that area too, but it doesn't sound like a ground issue at this point because you've done some good initial checking. No power at the contact means that the circuit is broken somewhere between the turn signal switch and lamp.

There are very common issues with pinched, burned, cut or otherwise mangled wires along the frame and under the tailgate area, so a physical inspection is called for first.
Up near the firewall is a connector with some of these wires too, you can pull it apart and after a quick inspection maybe jumper a wire from power to the wire for the right rear brake light and see if it lights up. If not, you've found the wire itself is faulty.

If a jumper ends up lighting the wire, then the next most likely culprit is the turn signal switch itself. New or old, it can still be at fault.
A non-working turn signal can sometimes be a bad flasher unit too of course, but since your left side works, we know that the flasher works.

Wire colors are:
Black w/red = backup lamps.
Brown = running lights
Green = Right/passenger stop/turn
Yellow w/black = Left/Driver stop/turn

Started this about three hours ago, but got sidetracked. Finally got a chance to hit reply!

Paul

 

[Birddog75]

Thanks Paul for clarifying the correct wire colors. I will test the wires at the 4 prong connector on the frame above the drivers side rear tire. Hopefully, I have power there.