Reverse polarity door lock problems.
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=53031
Printed Date: May 14, 2025 at 2:28 AM
Topic: Reverse polarity door lock problems.
Posted By: Illuminatrix1
Subject: Reverse polarity door lock problems.
Date Posted: April 01, 2005 at 10:24 PM
Hi all.
I have a 1989 ford Bronco ii and for the life of me I can not get the door locks wired up properly. I keep blowing fuses. I have used the diagrams provided on this site but I keep blowing the fuse on the positive connection. @ 86 and 87. If any one has experience with ford locking systems maybe they could give me some tips.
Cheers
Travis
Replies:
Posted By: extreme1
Date Posted: April 01, 2005 at 11:49 PM
you have 30 and 87a backwards
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Shaughn Murley
Install Manager, Dealer Services
Visions Electronics
Red Deer, Alberta
Posted By: Illuminatrix1
Date Posted: April 06, 2005 at 7:49 PM
I found the problem. I have the wrong type of relay's my relay shows that 87 and 87a are common. This I think is why it is screwing things up. Can anyone tell me where to get a switching relay and what the difference between these is????, I want to avoid getting the wrong kind again.
Thanks
Travis
Posted By: mo12v
Date Posted: April 06, 2005 at 8:01 PM
Single Pole Double Throw Relays are what U need...SPDT.......
Most Autoparts stores should have them.........OR......Try your local Mobile Electronics Store
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MO
Don't Learn from Others Mistakes
You Might Be the One That Knows.
Posted By: nava94
Date Posted: April 06, 2005 at 9:00 PM
make sure you test your door lock/unlock wires with a digital multimeter to know which one is your switch and which one is the motor wire.
Posted By: Illuminatrix1
Date Posted: April 08, 2005 at 12:02 AM
Thankyou all. I got the correct relays and it works now. I have another problem, but I will start a new thread.
This forum rocks....
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