Bought a 1987 f250, 351 I believe. Originally manual door locks/windows. Previous owner replaced the doors and got power locks & windows. They rigged up the windows to work. They cut the power cable from the door harness and hooked up to power. But they never hooked up the door locks.

Im trying to make the door locks work. I started messing with the passenger side first (the driver actuator was already frozen). The harness has 5 slots with 7 wires. Black, black/white, pink/ltgreen, pink/orange x2, pink/black x2. I cut the black/white wire and hooked it up to power. No go at the door lock switch. No voltage across the back of the switch either. The window switch works fine.

Im assuming I missed a ground somewhere? The two doors are not hooked up by a harness or hardwire either. (although the windows were hardwired to work from the the driver side). Where does the door lock mechanism and wiring connect to ground? Do the left and right systems need to be hooked up, ie share a ground? What do I need to do to get the passenger door lock switch working? If I only need to to connect the black/white wire to power and there is no voltage across the switch, does that mean the switch is bad?

Thanks

 

I have a 87 f150 with power locks, tomorrow or wednesday ill see about popping the door covers off and seeing how everything is hooked up for ya.

 

That would be great. Thanks

 

So, turns out I have a similar problem. Missing all the wires on the passenger side O.o Was wondering why it didn't work, now I know.

 

Not sure how it is on the 87-91 trucks but the 92+ need the WHOLE harness behind the dash to make either work. Can you control the passenger window from the drives side>?

 

I believe the door locks are a motor driven unit and not solenoid, meaning polarity is either forward or reversed (going dumb and can't think of the word I want to use) to cause locks to go up or down. In which case there will be no ground anywhere. Power goes into the switch, and then it's a 3 position momentary switch with 6 wires (5 minimum) that 2 will be power and ground, 2 will be paired together to match polarity of the input, 2 will be paired to be reverse of the input.

It would be in your best interest to just find a wire diagram of the switch and it will more than likely be obvious which wires are which.

 

The windows were wired to work from the driver side, but someone cut the wires from the harness and then ran cable from the passenger side to the driver side under the floor mat to make it work.

I thought the door lock worked as you described, where the circuit is complete when u press lock and unlock. Thats why I when I connected the power cable to power, it was curious that there was no voltage across the switch.

I looked for diagrams, but dont think i ever found one for the 87 f series. Saw some for broncos and 92 to 96 f series. But it doesnt list all the wires on my harness. they show the driver panel locks grounded off the page, but passenger does not show a ground. Thats why im wondering about shared ground. (although the passenger window worked on its own, so also wondered if the passenger panel was already grounded).

But still need to figure out how to get power across the switch. Maybe the switch is bad? How to tell that? I have a suspicion that neither of the door lock motors work, so relying on voltage checks.