RH brake light and signal not working

[bandt]

Was hoping to get some help with my 72 Challenger.
Initially the wire from my right hand brake light socket had broken.  I reconnected it assuming it would be fine. Still didn't work. So I have no rh brake light or signal. The other Brake light and front signals all work fine. Also all the parking lights work fine. I thought it might be the ground so tried grounding to the housing and socket still nothing. Unless I'm going insane I seem too have power at the the socket. I know the bulb is good I swapped it for the other side. But how can that be if there is power ground and a good bulb it should work. Could it be the socket? It's the original.
I read that it if there isn't power it could be the signal switch as brake light power goes through it.

Any ideas?

Thanks, Brian

[Chryco Psycho]

Welcome Brian , maybe you joined a while back & just have not posted 
The first thing you need to do is make sure you have power at the socket , do you have a multimeter ?
- if you have power you have a problem with the socket or ground at the tailight housing
- if there is no power then you need to check for power at the turn signal switch plug at the base of the column ,
- if you have power there then there is a problem with the wiring between the column & rear taillight socket ,
- if there is no power at the steering column plug then you have a problem with the turn signal switch , JSRestorations / Slotts can rebuild it or you can replace it , Standard part # TW7 . The turn signal switch sends power separately to each of the 4 corners of the car as you don't want the from lights to come on with the brake lights but you want to interupt both front & rear with the signal

[bandt]

Hi Neil,

Yep joined a long time ago, don't post much.
Thanks for the reply. I'm at a loss with this. So the socket is three wire power for brake/ signal, power for parking lights, and one on the socket ground. Originally the wire came off the socket. I soldered thatback on with a new terminal expecting that to be the end of it. Instead still no brake/signal. I seem to have power at the wire. Brown is brake/signal. I tried grounding from the socket wire got nothing. Is the wire to the socket ground?

[Chryco Psycho]

you should have 2 wires to the center of the socket , if there is a 3rd wire connected to teh side of the socket that would be a ground wire

[Chryco Psycho]

The running lights should be brown & turn green if it is left rear

[bandt]

It's RH. I've got brown and black with white tracer and grey to the socket. The grey wire just grounds the socket?

[bandt]

So it looks like a voltage drop problem. I don't have enough power at the socket to light the bulb. I have about 9 to 10 volts at the socket.

[Chryco Psycho]

Wiring diagram shows orange for brake & turn , brown for park lights but different years my vary
An incandecent bulb should still light at 10 v , I suspect ground problem but worth checking the connectors at the column & behind the kick panel to see if there is corrosion

[bandt]

 Thanks Neil,

Started checking voltage from the column back. By the time I was done and reassembled everything the power was back at the socket. I would say it was the disconnect plug to the rear harness. Anyway seems fine now. I know where to look. Thanks for your help.

Brian

[Cuda Cody]

Welcome @bandt    

Sounds like you got it working.   

[Chryco Psycho]

Glad to help & glad you got it sorted out , a little di-electric grease can go a long way to preventing low voltage & corrosion at the plugs