78 power lock switch not working

jimf81

New Member
Aug 23, 2022
22
Ok seems every time I fix one thing I find another. Started installing new door panels and connected power lock switches and they do nothing neither side. I checked harness into the doors and see no issues. can anyone point me into some steps to troubleshoot this? possible a wiring diagram? How can i test the wires into the harness? power windows work fine. Any ideas or help would be greatly appreciated!
 

Twisted_Metal

Administrator
Staff member
Lifetime Gold Member
Feb 26, 2004
31,657
Bloomington, MN
First place I would look is the lead plugged into the fuse box.

It’s the easiest thing to access before you go tracing wires.
 

jimf81

New Member
Aug 23, 2022
22
I was able to test and am getting 12 volt at the orange wire on the door that has the 5 pins for switch. Also tested two grounds off that to door those all seem fine. I unplugged plug to actuator and tried to check that but dont seem to be getting 12 volts there when I press the switch. where do those go and connect to? Is there a relay anywhere or any other harness I can check?
 

jimf81

New Member
Aug 23, 2022
22
How many volts should I be getting at the actuator when the button is pressed? I would think 12?
 




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