Flashing head lights

[Tcoon6218]

When I am driving with my brights on all 4 headlights start flashing after a random amount of time. Unplug one bright on either side and it stops doesn’t flash with just the low beams.
1987 v10

 

[squaredeal91]

I'm guessing the circuit breaker is failing. Turning itself off, cooling and coming back on till it gets too hot again. Could be poor ground. I'm sure more knowledgeable ideas will chime in. @82sbshortbed went through this a short while back.

 

[82sbshortbed]

I cleaned up the wires and put a new headlights switch on it and seemed to fix it.

 

[fast 99]

Some aftermarket lights draw more amps than system was designed for.

 

[codfish]

I had the same issue, even after a new switch install.

Ended up buying a couple of relays and doing the relay upgrade. Lights noticeably brighter and no more flickering.

codfish