Driver's door not unlocking from fob or keypad

Tiny
ERICH PETERSON
  • MEMBER
  • 1993 FORD E-SERIES VAN
  • 5.8L
  • V8
  • 2WD
  • AUTOMATIC
  • 89,000 MILES
So, my E150 driver's side door will lock all doors and will unlock all doors, except the driver's door will not unlock. I have tested at the switch and see 12-volts on the pink/yellow when I push the switch to the lock position, and 12-volts at the pink/green when I push the switch to the unlock position.

I have also, disconnected the plug under the actuator and I see 12 volts on one side when locking, but not on the other red/orange wire when unlocking.

I have located the anti-theft and remote keyless entry module which both have red/orange wires in their harnesses. Neither one outputs 12-volts when pressing the unlock button.

I'm wondering if this means the problem is with the remote keyless entry module.

Also, I was wondering if you had the diagrams for this system?

Thanks!
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Tuesday, October 12th, 2021 AT 7:27 PM

5 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

I was able to find a wiring schematic for the keyless entry system. I attached it below. I had to cut the pic in half to make it readable for you, but I did overlap the two so you can follow from one to the next.

Are you checking output at the module itself? It sounds as though you have power to it but nothing out, which could indicate the module is the problem.

Take a look at the schematic below and let me know if you have questions.

Take care,

Joe

See pics below.
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Tuesday, October 12th, 2021 AT 8:13 PM
Tiny
ERICH PETERSON
  • MEMBER
Thanks so much! Since these units are so hard to find, I was thinking of jumping the pink/black and red/orange just after the module. I think this would do the trick. I think the only thing affected would be that you would have to hit the unlock on the key fob twice to get it to open the driver's door with all the rest. Does that sound reasonable?
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Wednesday, October 13th, 2021 AT 5:44 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

First, you are very welcome. As far as what you described, I've never done it. In theory, it looks like it would work. I would give it a try.

Let me know what you find.

Take care,

Joe
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Wednesday, October 13th, 2021 AT 5:01 PM
Tiny
ERICH PETERSON
  • MEMBER
Just a follow-up: I jumped the two aforementioned wires with a T-Tap, and it is functioning as normal now (just need to hit unlock twice on the key fob to open the front door with all the others).

Thanks again!
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Thursday, October 14th, 2021 AT 10:22 AM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Erich:

Thanks for the update. I'm glad to hear it worked for you. Also, chances are your technique will help others in the future. I never thought of jumping things that way, but it certainly worked and was a good idea.

Again, thank you for your update, and feel free to come back anytime in the future. You're always welcome here, and now that you have your own specialized repair, you need to feel like part of the family. LOL

Take good care of yourself.
Joe
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Thursday, October 14th, 2021 AT 5:32 PM

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