Dash light help

[collin70k/20]

Hey guys on my way home from work one day I lost my dash lights and side marker lights in my 1970 k/20. But I still had headlights. Thought it was the fuse. Wasn’t blown but I replaced it anyway and it did nothing. Was wondering where to start, thanks for any help, Collin

[stsalvage]

most guy will say change the head light switch its the main thing that connects everything.Go buy a new one.

Yes people say i hate throwing parts at my trucks but its a given

[87Skier]

Originally Posted by stsalvage

most guy will say change the head light switch its the main thing that connects everything.Go buy a new one.

Yes people say i hate throwing parts at my trucks but its a given

That's where I would start. If you have time, you could make sure that your headlight switch is supplying power to the proper wiring.

If you want to test it, you should have 12 volts at these points:
At the cluster: Gray wire is illumination (from fuse panel)
At the switch:
Dark green is cluster lights (goes to fuse panel)
Brown are running lights

[harpo231]

Check ground.....

[collin70k/20]

Ok thanks guys for the help. I just ordered a switch and will get power supply’s and the grounds.