J20 dome light wiring -- need help rebuilding
My new-to-me 1981 J20 has a two wire connector hanging from the dome light at the rear of the headliner, but the other half of this two-wire wire harness is missing. Where does the dome light on the J trucks normally get power and ground? I'm looking to use a length of 16-2 wire to restore the circuit. I have jamb switches, which both need to be replaced. For now, I'm curious about the 'factory' power supply for the dome light, and I'll worry about the jamb switches later.
'88 Waggy 167k, AMC 360, bone stock, just coming back to life after 7 years under a tree...