How To Test 2nd Ign/Accessory Wire

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=38845
Printed Date: July 15, 2025 at 8:02 AM

Topic: How To Test 2nd Ign/Accessory Wire

Posted By: newinstaller
Subject: How To Test 2nd Ign/Accessory Wire
Date Posted: September 09, 2004 at 12:33 AM

Hi,

I am new to installing remote starters. Done 101 Honda's. Feel Comfortable doing others now.

I know that some GM and Fords need something else powered to turn on the heat/ac.

First What is that called? 2nd Ign or 2 Accessory?

Second how do you test that before so you dont find out after the install when you go to remote start it and there is no heat?

Please help out a new installer

Thanks

Replies:

Posted By: sroth140
Date Posted: September 09, 2004 at 1:34 AM

2ign often acts as an accy wire. that is, it drops voltage during crank.

some fords have several accy wires of the same color accy. one of them is the blower. in that case, test for the largest voltage drop when you go from blower off to on.

if you are using a program like techsoft, it will tell you if any ign or accy is necessary for remote start. then you test the wire to verify the information is correct, meaning it behaves like an accy by dropping voltage during crank, and has voltage in the accy position also.

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MECP certified installer

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