89 F350 no clearance/tail lights

89 F350 no clearance/tail lights - help?

Thread view:

Enable EMail Alerts

Start New Thread

Thread rating:

hausdr - 03 Jun 2006 00:41 GMT

My clearance & tail lights were going on & off every few minutes for a
while, now they are out completely. I checked the fuse & relay, they're
both OK. Is there a circuit breaker somewhere that might have failed?

Reply to this Message

Dave Lee - 03 Jun 2006 01:15 GMT

any damage lately? I'd look for a pinched wire somewhere

> My clearance & tail lights were going on & off every few minutes for a
> while, now they are out completely. I checked the fuse & relay, they're
> both OK. Is there a circuit breaker somewhere that might have failed?

Reply to this Message

Rodan - 03 Jun 2006 19:26 GMT

"hausdr" wrote: < 89 F350 clearance/tail lights >

Clearance & tail lights were going on & off.
Then they went out completely.
Fuse & relay are both OK.
______________________________________________

This condition could result from a defective light switch.
Current going through a poor connection heats up the
contacts, the hot contacts deform and break the circuit.
With no current, the contacts cool and twist back to
reconnect, starting the on-and-off cycle again. Finally
the contacts are so deformed they to not reconnect.

To check, remove the connector from the light switch
and jump the connector's 12V pin to its clearance/tail
light pin. If the lights work, the switch was defective.

Good luck.

Rodan.

Reply to this Message