[ThomasB0726]

Thank you both for your replies.

I will buy a test light, I guess I could find one of those at my local Pep Boys/Auto Parts store.

I will check for dirty contacts at the headlights, along with making sure I have good headlights. If that doesn't work I'll buy a new switch, since every other bulb on/in the truck works fine.

As for the temperature sensor gauge: I believe I'm getting a connection, because when I unplugged the sensor the "Check Engine" light came on.

Thanks again for your help. I'm trying to fix these little things before getting rid of the truck, so the new owner doesn't have to worry.