Keyless Entry, Please Help!
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Junior User
Joined: Nov 2003
Posts: 51
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Keyless Entry, Please Help!
1991 Ford Explorer Eddie Bauer 4X4 4.0L...
I'm having trouble with the door lock/unlock control harness that came with the keyless entry system. There are three wires (Red, Green, and Red/Black) that are supposed to connect to the vehicle's door lock system. Through reading other posts, I think my vehicle is a reverse polarity system, requiring the use of relays. Unfortunately, I am not very familiar with the wiring systems (I can match colors though =D ) or some of the terminology used. I want the system to lock/unlock all doors. Can anyone please take the time to explain how to hook this system up, and if relays are needed, explain which wire goes where? The instruction manual has four systems listed...
3 wire ground switched signal tep door locks
3 wire ground switched 2 step door locks
3 wire positive switched door locks
3 wire positive switched 2 step door locks
I don't think any of these apply to my vehicle, correct?
Here's a table they provided regarding the three different wires...
Wire Color Function Polarity
Red Lock Ground (-)
Red Unlock Positive (+)
Green Lock Positive (+)
Green Unlock Ground (-)
Red/Black 2nd Unlock Pulse Ground (-)
I'm having trouble with the door lock/unlock control harness that came with the keyless entry system. There are three wires (Red, Green, and Red/Black) that are supposed to connect to the vehicle's door lock system. Through reading other posts, I think my vehicle is a reverse polarity system, requiring the use of relays. Unfortunately, I am not very familiar with the wiring systems (I can match colors though =D ) or some of the terminology used. I want the system to lock/unlock all doors. Can anyone please take the time to explain how to hook this system up, and if relays are needed, explain which wire goes where? The instruction manual has four systems listed...
3 wire ground switched signal tep door locks
3 wire ground switched 2 step door locks
3 wire positive switched door locks
3 wire positive switched 2 step door locks
I don't think any of these apply to my vehicle, correct?
Here's a table they provided regarding the three different wires...
Wire Color Function Polarity
Red Lock Ground (-)
Red Unlock Positive (+)
Green Lock Positive (+)
Green Unlock Ground (-)
Red/Black 2nd Unlock Pulse Ground (-)
Postmaster
Joined: Oct 2003
Posts: 4,516
Likes: 1
From: SoCal
If this is wired the same as my 87 Ranger you allready have the lock & unlock relays, and all they do is reverse the polarity thru the lock motors.
To understand how the lock circuit works go here www.helminc.com & order the the Ford "electrical & vacuum troubleshooting manual" for your 91.
You should have this manual anyway, since this wont be the only electrical problem that you will have with your Ex and the EVTM will have wiring diagrams for ALL the different circuits.
Worth every penny of the approx 20 bucks it will cost you.
To understand how the lock circuit works go here www.helminc.com & order the the Ford "electrical & vacuum troubleshooting manual" for your 91.
You should have this manual anyway, since this wont be the only electrical problem that you will have with your Ex and the EVTM will have wiring diagrams for ALL the different circuits.
Worth every penny of the approx 20 bucks it will cost you.
