Low beam head lights turn on and off

2002 DODGE RAM

150,000 MILES • 4.7L • V8 • 2WD • AUTOMATIC

LYLE REHBERG

MEMBER
1 POST

Truck listed above is a 1500. Headlight low beams, both, turn off and on. They are off most of the time. I hit a pothole and they come on and off they go with another pothole.

Apr 20, 2019 at 7:45 AM

CARADIODOC

✓Experienced Mechanic
34,413 POSTS

The insane engineers have involved two computers with running the head lights. The head light switch is an input to the instrument cluster. That sends a message to the Integrated Power Module, (under-hood fuse box), and that module runs the head lights.

If the parking and tail lights turn off at the same time, the best suspect would be an intermittent connection at the head light switch connector. If the tail lights stay on, that proves the instrument cluster is getting the signal from the head light switch, then the better suspect is the Integrated Power Module. It is my understanding those do cause a lot of trouble.

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