resistor door locks, 99 alero

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luvs2div

Member - Posts: 21

Joined: March 23, 2003

Location: United States

Posted: January 07, 2011 at 11:13 PM / IP Logged

99 Alero takes a straight negative to lock. Takes a negative through a 1500 ohm resistor to unlock. Mars 33 Alarm/Remote start combo. Of course I tried to sneak the resistor directly in line but no dice. Since it has a neg. output only. So I used 1 single relay just on the unlock side. Lock works fine. I hit unlock and the relay clicks but no unlock. stuck a test light on the the trigger side of the relay and the relay clicked, locks unlocked... Relay is getting the signal from the brain and clicking the relay... won't unlock. I trigger the same wire with a test light/probe, works every time... ??? Please enlighten me???

zerepdivad

Silver - Posts: 605

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Joined: July 03, 2006

Location: Wisconsin, United States

Posted: January 08, 2011 at 1:27 AM / IP Logged

how is your relay wired?

should be something like this

87- ground

86-12volts

85- negative out from unit

30- negative lock wire with resistor inline

A DMM is a beautiful thing.

MECP Advanced Installer Certified.

luvs2div

Member - Posts: 21

Joined: March 23, 2003

Location: United States

Posted: January 08, 2011 at 8:52 AM / IP Logged

Yes, thats the way its wired. It works fine if i trigger it any other way than the RS neg. output. Even with that, the relay clicks. Darndest thing. Installed thousands of remote starts and this baffles me a bit...

zerepdivad

Silver - Posts: 605

Joined: July 03, 2006

Location: Wisconsin, United States

Posted: January 08, 2011 at 12:12 PM / IP Logged

the negative out from the remote start might be too weak to trigger the relay then. get maybe a smaller relay? dei 451m works great

A DMM is a beautiful thing.

MECP Advanced Installer Certified.

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resistor door locks, 99 alero

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