I have an '89 D250 that has grid heater wiring problems. I have a replacement wiring harness with all the necessary wiring and solenoids for the grid heater. My question is if there is a wiring diagram someone has or if anyone can give me some ideas how to wire these solenoids myself. I have everything I need, I just can't figure out how to hook it all up.

 

thats a good question as i am thinkin someday im gunna put a cummins in the ol chev mountain beater and need to know how to wire it up