My 70 Roadrunner has headlight problems. After they have been on for 2-3 minutes they go out. 20-30 seconds later they come back on again then go out after 10-20 seconds. That continues for as long as I have them on. I assume that is a bad relay or breaker but cannot find where it is located to replace. Anyone know?? Thanks

 

The headlight switch has a automatic reset breaker built into it. check to see if the switch is getting hot. If it is not, the switch is probably bad, but if it is I would check and clean all the connections from the switch to the bulbs. There are probably some bad connections in the circuit.

 

I do not believe the headlight switch (toggle type) on my Roadrunner has a built in breaker. I have taken it apart and just see simple contacts. Wher else might the breaker be??

 

Check all of the grounds in and near the headlights

 

Jump on over to MyMopar and download a factory service manual

http://www.mymopar.com/index.php?pid=31

http://www.mymopar.com/downloads/ser...ice_Manual.zip

This manual is consecutively page numbered, so you'll have to "play" with page no's a bit

http://www.mymopar.com/downloads/ser...ice_Manual.zip

Index to the electrical chapter is page 233

Index to wiring diagrams is page 353

Instrument panel section for Satellite / Belvedere is page 378

Headlight switch is far right, near top of page 379

Headlight power (not tail or dash light) comes TO the switch on L1-16BK lower right of switch

Follow this down, off page and back on from the left side of the page above

This wire goes to the left and goes to an in harness splice with six branches.

If you follow R6A-12BK off to the left, and up and off to the right, and back to the next page, you will find that it ends up at the left side of the ammeter

THERE IS NO fuse or breaker protection for the headlights except for

the main fuse link in the engine bay, and the breaker built inside the headlight switch


There can be several causes................

if you have added heavier, IE Halogen lamps

if the switch itself internally has a bad connection or contact, building heat

if the switch harness connector has a bad connection, building heat.