Brake light issue

1979 FORD F-100
48,000 MILES • 0.5L • V8 • 2WD • AUTOMATIC
Avatar
2
  • MEMBER
  • 1 POST
No brake light on left side with head lights on.
Aug 2, 2017 at 5:36 PM
Advertisement
Avatar
CJ MEDEVAC
  • ASE Certified Mechanic
  • 11,004 POSTS
  • ASE Certified Mechanic
Lots of times this is usually a ground issue.

Search for a broken/corroded/loose ground wire for the tail light assembly.

If you are having a problem, you might try a temporary jumper wire from the housing to the body/ frame to see if it works.

Some folks just run another ground to it permanently if indeed, lack of ground is the issue.

Sometimes the reason the other lights sort of working is the running light or brake light will seek a ground from the running light or the brake light power feed. Thought you might want to know why it could act like this.

Keep us posted.

The Medic
Aug 2, 2017 at 6:18 PM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.