negative output...positive trunk?
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=16066
Printed Date: September 10, 2025 at 9:40 PM
Topic: negative output...positive trunk?
Posted By: bigt_45
Subject: negative output...positive trunk?
Date Posted: July 08, 2003 at 7:04 PM
i found out that my trunk needs a positive pulse to trigger it to open. my alarm sends a negative output pulse when u press the trunk button on the transmitter. is this why my transmitter wont open my trunk?
Replies:
Posted By: profuse007
Date Posted: July 08, 2003 at 7:12 PM
you need a relay to output the large amount of current to the trunk pop.
relay wire:
alarm(-) to 85
constant power to 86&30
the trunk 87
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Houston,TX
"The two most common elements in the universe are H+ and stupidity" (Ellison).
Posted By: cool_greg
Date Posted: July 08, 2003 at 7:16 PM
Yes, use a relay to send a swictched postive to the trunk release
Wiring as follows
- output from alarm to pin 85 on relay
+ 12V fused to pin 86 and 30 on relay
+ 12V for trunk release to pin 87 on relay
just make sure that the fuse is big enough, most likley 10amp will do.
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Just a Guy, Wiring up those Vehicals
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Gool_Greg
Posted By: Sebastian018
Date Posted: July 08, 2003 at 7:54 PM
Posted By: bigt_45
Date Posted: July 08, 2003 at 9:44 PM
thanx guys, that worked perfectly!!!!!!!!!!!!
Posted By: IXJ159
Date Posted: July 08, 2003 at 10:03 PM
why is it that everyone in the12volt.com forums feel they need to repeat easy answers 200 times?????
Posted By: cool_greg
Date Posted: July 09, 2003 at 6:39 PM
because you will notice that all 3 replys were within a very short time of each other and the 2 slower posters didn't see the 1st reply
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Just a Guy, Wiring up those Vehicals
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Gool_Greg
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