polarity reversing relay

Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=45365
Printed Date: July 15, 2025 at 2:59 PM

Topic: polarity reversing relay

Posted By: andythirty7
Subject: polarity reversing relay
Date Posted: December 16, 2004 at 4:48 PM

Im installing a trunk lift unit in my 37 ford. Two wires reverse polarity to make unit go in opposite direction. I only have one trigger wire left on my remote. Ive got a DPDT latching relay now with two coils. I can only activate one coil with the one trigger wire. Need a different kind of realy or two more of these latching ones. Kinda wanted to keep it simple. (relay was 25.00) Does any of this make sense.??

Replies:

Posted By: auex
Date Posted: December 16, 2004 at 11:05 PM

You will need 2 SPDT relays, should be relatively cheap. You will also need rig up some limit switches, hopefully the actuator or motor you have will have these built in. Well you would need something similar to this diagram.

posted_image

The lock and unlock outputs would be the open close triggers. The "to actuators" would be the wires that go to the motor.

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Posted By: andythirty7
Date Posted: December 17, 2004 at 5:18 PM

I dont see how if I need two wires from my remote for the lock and unlock and I only have one how will this work. If the single wire is hooked to both lock/unlock wires at the same time it wont work either.