E-Bodies.org Cuda Challenger Forum

Technical Shop => Electrical & Audio => Topic started by: BIGSHCLUNK on October 11, 2020, 09:39:33 AM

Title: Half Brake Lights
Post by: BIGSHCLUNK on October 11, 2020, 09:39:33 AM
Concerned citizens have recently informed me of a "no brakes lights" on the right side. Checked the plug in the left A pillar. All good, ran power to the lights, no issues. Checked from pillar to column - good continuity there too. I'm thinking my turn signal switch is having an issue (?). Before I tear the column apart, am I missing anything? Yes looked at brake light switch also, thats not the issue
Title: Re: Half Brake Lights
Post by: anlauto on October 11, 2020, 09:42:36 AM
Isn't the right side and left side brake lights on the same circuit ? How would one work and not the other ?  :huh:
Title: Re: Half Brake Lights
Post by: BIGSHCLUNK on October 11, 2020, 09:49:15 AM
Left and right / different wire off the colum
Title: Re: Half Brake Lights
Post by: Chryco Psycho on October 11, 2020, 10:28:45 AM
Exactly power from the brake light switch  goes up to the turn signal switch where ti splits  so either side can be interupted so the signal works , , I would agree that the turn signal switch is where the problem is likely to be . :bigthumb:
Title: Re: Half Brake Lights
Post by: anlauto on October 11, 2020, 01:17:47 PM
Quote from: BIGSHCLUNK on October 11, 2020, 09:49:15 AM
Left and right / different wire off the colum

Interesting...so I agree with you guys...sounds like a signal switch issue...an odd one for sure. :thinking:
Title: Re: Half Brake Lights
Post by: Chryco Psycho on October 11, 2020, 01:22:48 PM
Actually very common , these 50 year old switches tend to have issues , JS / Jim can rebuild them so you can keep the original switch .
Brake & turn signal both use the same circuit & light the same bulbs so it has to be separated so the other side doesn't flash when turning
Title: Re: Half Brake Lights
Post by: anlauto on October 11, 2020, 01:26:03 PM
Makes total sense with the "not flashing when braking" I never thought of that.  :worship:

95% of the cars I work with get new switches installed during the restoration, so it's an issue I haven't seen a lot of. :tool:
Title: Re: Half Brake Lights
Post by: Cratos on October 13, 2020, 10:05:47 AM
Try making sure you have good grounds from the socket I had to add a grounds to all the rear and side markers for them to work.