[ron350]

This is how I have a 22535998 chime module hooked up on my 75 C10 to let me know that my lights are still on.

When I open the door with the head lights or parking lights still on the module will chime. I had to hook this up after coming out of stores to find a dead battery because I forgot to turn the lights off.

Run a wire from the door jamb ground switch to pin 3 and over to pin 6 on chime module.

Run another wire from the top plug on the head light switch to pin 7 on the chime module.
The top pin on the head light switch has 12 volts on it when the parking lights or headlights are on.

By using the door jamb switch as ground for pin 3 & 6 the module does not need 12 volts constant power to make a chime.