relay not activating

Printed From: the12volt.com
Forum Name: Relays
Forum Discription: Relay Diagrams, SPDT Relays, SPST Relays, DPDT Relays, Latching Relays, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=62447
Printed Date: July 04, 2025 at 5:26 PM

Topic: relay not activating

Posted By: thatsjeek
Subject: relay not activating
Date Posted: September 09, 2005 at 3:46 PM

I recently installed a trunk release to an existing unit that has a channel for a trunk release.
when the car is off the negative output only reads 7 volts or so and the relay wont activate therefore the trunk solenoid doesnt work.
when the car is on the output reads 13 volts and the relay activates and everything works as intended.
i just can't figure out what to do.. any suggestions?

Replies:

Posted By: hotwaterwizard
Date Posted: September 09, 2005 at 11:13 PM

Find another source of Power for the installed Unit. Find a source that reads 12v when the key is off. Maybe even try running the power lead to the battery.

Also look for a bad Ground.

-------------
John DeRosa (Hotwaterwizard)
Stockton California
When in doubt, try it out !

Posted By: blazeronspokes
Date Posted: September 14, 2005 at 8:34 PM

what kind of car is this in?

Posted By: thatsjeek
Date Posted: September 15, 2005 at 10:20 AM

95 toyota corolla

Posted By: blazeronspokes
Date Posted: September 16, 2005 at 9:44 AM

is it the negative output on the alarm brain reading 7 volts? what i would suggest is that you wire a relay with a good power and ground source to give the trunk pop the power it needs.

Posted By: rami_1r
Date Posted: September 24, 2005 at 7:44 AM

i would suggest to replace the vehicles battery.

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