1981 K1500 Power Door Locks- Rear not working

[scenic760]

Hello all,

I'm working on putting the doors back together and I put in all new actuators while I had them apart. The passenger rear wasn't working before I took them apart and even with the new actuator it wasn't working so I started trouble shooting.

I'm getting right around 9v at all the doors and the front doors are working fine. Should I be getting 12v at all the doors? It's been sitting a while so I put the battery on charge and see what I get then, however if I still end up with 9v does that mean the relay needs to be replaced?

I felt around in the back doors to see if something was binding and there seems to be some friction spots on the linkage, along with a few more connections than the front doors, that I hit with silicone grease and it helped but didn't correct it 100%. The driver rear works but some times takes a few bumps of the switch to get it to go all the way.

My suspicion is that the rear door linkages by nature need a little more kick to engage them fully and it requires a full 12v punch?

 

[scenic760]

Quick update...I charged the battery and now getting 12v at the plugs and everything is working good..I think my suspicion was correct that the rear door mechanisms need the full punch of 12v to actuate

 

[keithself68]

Do you have a schematic or color coded wiring diagram including the relay mine were cut when I got the truck can't find anything online that tells what goes where