Ignition 1 and Ignition 2 tied together

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=43114
Printed Date: April 28, 2024 at 5:33 PM

Topic: Ignition 1 and Ignition 2 tied together

Posted By: birdslam
Subject: Ignition 1 and Ignition 2 tied together
Date Posted: November 16, 2004 at 12:12 PM

Question for the experts out there. Can someone give me a reason why I can't just tie IGN1 and IGN2 wires together? I did some checking and with the key on, both wires come on at the same time and both shut off at the same time. I am guessing that these two wires just power two different modules so I don't see why shorting them together vs. adding an extra relay and using a programmable output to control the second one would be any different. Can someone explain to me why I shouldn't do this?

Thanks!

Replies:

Posted By: Rbalan
Date Posted: November 16, 2004 at 3:08 PM

If I'm not mistaken one of the wire will lose power while cranking.

Posted By: wiretapper
Date Posted: November 16, 2004 at 3:21 PM

One GOOD reason is that your single controlling wire might not have the current capability to power up two possibly high current wires at the same time.

If you can be certain that the two wires are low current, AND they BOTH stay up when you crank it, then you'd probably be OK.

Posted By: spl-Hz
Date Posted: November 16, 2004 at 3:34 PM

Very bad idea. There is two IGN wires for a reason. Just add the relay and you wont ever lose sleep over it.

Automotive Stereo & Alarm

Posted By: Teken
Date Posted: November 16, 2004 at 5:22 PM

All three reasons above are exactly right. Now you have two more answers then you needed.

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Knowledge is power. But only if you apply that knowledge in a positive way, which promotes positive results in others.

EVIL Teken . . .