Reverse Polarity Door Actuator

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=51020
Printed Date: September 06, 2025 at 8:56 AM

Topic: Reverse Polarity Door Actuator

Posted By: Broken
Subject: Reverse Polarity Door Actuator
Date Posted: February 27, 2005 at 11:37 PM

Hey all, Having some issues with a door actuator I am installing.

I am using an alarm with "dual polarity" lock/unlock. I ran a 12v power, the door luck/ unlock wires to the door. I connected both the lock/unlock to seperate relays, connected the two power wires to each relay and connected the actuator to both #30 on each relay and grounded the relays. Everything matches the diagram, but the acutuator isnt engaging. I press arm, nothing happens. I measured current and this is what I got.

-measured at the alarm box connection. when I press engage the current pulsed like I thought it should

-measured after the box that converts 3 wires to 2 wires(lock,unlock,positive12v?) but there was no longer any current pulse.

Is this something to fo with the reverse polarity? Please help!!!

THanks in advance.

Adam B.

Replies:

Posted By: secureauto
Date Posted: February 27, 2005 at 11:47 PM

Does the diagram you followed look like this one?

Reverse polarity

Also, do you hear the relays clicking? Try putting diodes on the lock/unlock wires, stripe (cathode) side
towards alarm.

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ASE Certified

Posted By: KarTuneMan
Date Posted: February 27, 2005 at 11:48 PM

Done like this..... ?

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Posted By: Broken
Date Posted: February 27, 2005 at 11:59 PM

Yes I used that diagram. Is there supposed to be a current pulse on the opposite side of that convertor box?

Posted By: Broken
Date Posted: February 28, 2005 at 12:02 AM

by the way, I am using a

phoenix digital pd-144

Posted By: secureauto
Date Posted: February 28, 2005 at 12:09 AM

Broken wrote:

Yes I used that diagram. Is there supposed to be a current pulse on the opposite side of that convertor box?

Convertor box? are you using one of these?

Polarity convertor

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ASE Certified

Posted By: Broken
Date Posted: February 28, 2005 at 12:36 AM

here is the convertor i was referring to, included with the alarm

posted_image

Posted By: secureauto
Date Posted: February 28, 2005 at 12:42 AM

You can do without the convertor box, since your using relays. If the alarm comes with a separate doorlock harness use that with the relays if not, cut off the convertor box.

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ASE Certified

Posted By: Broken
Date Posted: February 28, 2005 at 12:49 AM

Ok thanks so much!

Just curious, when would the convertor be used

Posted By: Broken
Date Posted: February 28, 2005 at 12:52 AM

do I have to use relays since i have this convertor box?

Posted By: Broken
Date Posted: February 28, 2005 at 12:55 AM

Thanks for your help secure!

Posted By: secureauto
Date Posted: February 28, 2005 at 1:06 AM

The convertor box can be used for Some GM and other vehicles that require a positive (+) pulse for the doorlocks. Im glad I could help posted_image

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ASE Certified