Slick 60's

newest owner of 65 long bed

headlights begin to flash on and off after being on for a few minutes. also when the high beams are clicked the dash goes black.

still learning my way around the truck. any suggestions appreciated.

this is a great site

thanks,

lefty

My first thought would be a grounding issue. I'd check that real good first.

i think the switch is bad.
this tells the story
http://fordtruk.com/index41.html

which switch do you think? headlight or dimmer?

headlite switch you can order one from LMC truck catolog on line

check your headlamp bulbs also. The same thing happened to my 65 and one of the filaments in the driver side bulb broke and shorted out that light causing them to go on and off when you went over bumps.

I would first of all check the grounds, then check all connections. The switch is also notorious for creating problems, best thing to do if you are replacing with a new switch is to also go with the headlight relay and reduce the current going throught the switch. The relay kit is available from LMC also.

Dean

The dimmer gets pretty beat up too. It caused mine to work intermitantly.

Blinking headlights are common on slicks.Best thing to do is like Dean said . I added relays to mine and the problem was gone.

Might check and see if there is a circuit breaker on the switch. They will auto reset making your head lights flash on and off.

fought with that for so many years before reading the article on the relays,but never had a prob since i started using them.

yes the headlight switches have circut breakers in them and will pop on and off as they heat up and cool down. possibly a bd dimmer switch if it only does it on high beams. but it could be the headlight switch.