parklight go off

[jreyes]

I own a 67 f100 and my problem is that when I pull headlight swith to tun them on my front parklight go off also my cluster light dont work either.......what will be the problem if i just change the headlight swith and turn signal swith new.......everything work fine is just that problem.....any body with similar problem or is just that year that work like that?

[fordman]

when you turn the headlights on the park lights are suppose to go off. the cluster lights are controlled by the headlight switch. you can turn the knob to turn up the brigthness of the cluster lights. and also turn on the dome light. if it doesnt turn up the cluster ligths then the headlight switch rheostat is bad. and the headlight switch will need to be replaced.

[Thunderfoot]

also check the fuse for the instrument lights, it could be blown...

[Thunderfoot]

67 was the only year that the front park lights would turn off when you turn the headlights on.

This was the same up through the 70 trucks, it was in 71 that they changed to where they stay on with the headlights.

[70_F100]

67 was the only year that the front park lights would turn off when you turn the headlights on.

This was the same up through the 70 trucks, it was in 71 that they changed to where they stay on with the headlights.

70, but who's counting...???

[fireguywtc]

Shayne, thanks for the correction. For some reason I had it in my head that it was a 67 only feature, but it is in fact a 67-69 feature. 70-72 had to change to the wrap around marker lights to meet new requirements and they had to stay on when the headlights were turned on. http://www.fordification.com/tech/67-72ID_01.htm

The '70-up pickups have parking lights that wrap around the side which were considered acceptable as side lights too, as long as they stayed on with the headlights. A wiring change in '70 made the parking lights stay on with the headlights, unlike the '67-'69 trucks which had parking lights that were off whenever the headlights were on. (The '70 change was in the wiring harness, not in the headlight switch, which remained the same from the previous year.)

[jreyes]

thanks too you'll that was really confused to me since I own a 1972 f100 too......I thought they work the same....you always learn something new...