4 prong relay

I have a keyless entry system with relays on board in my truck. I just added a remote start system but the lock/unlock function will not tie into the keyless entry system. I can wire a relay for the RS system lock/unlock, but I can only get 4 prong relays in the small town that I live in. My problem is I don't know how to properly wire a four prong relay.

Who said anything about a 5 wire setup?

Another term for wiring an actuator to relays can be called a 5 wire setup, but realistically it is known as a (reversing polarity).

Basically, you need reverse the polarity on the actuator wires to get them to move up or down. A 4 prong relay is missing the center terminal (87a). That terminal needs to be grounded (-). with a 4 prong to can only send positive or negative depending, but not both...and you need both to get the actuator to move back and forth.

The 4 prong you have is typically used for switching or boosting only, like for a fog light switch were you only need to send a + or - signal. You can not make a 4 prong relay send both.

So you will need to find some 5 prong relays (you need 2) or a doorlock relay module.

Sorry, take care.

You are right I get it now.

Yep..I count "5" on each..  lol

Nice diagram.

All of them are used too! I count 10 on the relays combined.

If I had more fingers I could count even higher!