Verify 03 Silverado RS Install

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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=21640
Printed Date: July 14, 2025 at 1:46 AM

Topic: Verify 03 Silverado RS Install

Posted By: cwagner17
Subject: Verify 03 Silverado RS Install
Date Posted: November 18, 2003 at 9:49 AM

I have it hooked up and it seems to be working correctly. But I have seen many different Wire Charts for this vehicle and just want to verify I have it connected correctly. Here is how I hooked it up:

2003 Silverado
STARTER - yellow
IGNITION - pink (12 awg)
SECOND IGNITION - white
THIRD IGNITION - pink (18 awg)
ACCESSORY - orange
SECOND ACCESSORY - brown

Some other wire charts did not have the third ignition wire listed, and I heard that some ppl were missing a wire and the tranny computer wasn't coming on and they were cooking their tranny.

Anyone verify this? Thanks

Replies:

Posted By: mazdatruckin
Date Posted: November 18, 2003 at 10:57 AM

The wire charts i have. There is no third ignition. I know if you donn't power the 2nd one, you will cause the tranny to throw codes and become damaged. Everything seems correct. Try testing the third ignition with a multimeter and see where it gets power and then juts wire it up to mimic it.

Looked at 3 charts and no 3rd ign. Just meter it and see what you get.

Posted By: hititup16
Date Posted: November 19, 2003 at 8:21 PM

i did a remote start in my 03 silverado and i didnt know about the 3rd ign wire...... when i remote started it the check engine light came on

Posted By: Velocity Motors
Date Posted: November 20, 2003 at 12:05 AM

3 rd IGN is usually the BROWN wire for the wiper's. Not necesarry for RS. If you got a check engine light it's because the the 2nd IGN wasn't powered up or the starter wire needs to be isolated from the RS unit.

-------------
Jeff
Velocity Custom Home Theater
Mobile Audio/Video Specialist
Morden, Manitoba CANADA

Posted By: JWorm
Date Posted: November 20, 2003 at 12:47 AM

When those trucks first cam out, DEI listed them as requiring 3 ignitions and 2 acc. After a few months they dropped the 3rd ignition (18 awg pink) wire from the chart. I've probably done 10 since then without using the 3rd ignition and they've all been fine. I've heard from other installers the brown (2nd acc) wire isn't even necessary, but never tried not using it myself.

Posted By: cwagner17
Date Posted: November 20, 2003 at 6:19 AM

ok thanks for the info.....

so hooking the 18awg Pink wire up should not hurt anything? or should i go back and disconnect it?

thanks

Posted By: cwagner17
Date Posted: November 21, 2003 at 5:01 PM

^^^^^^^
BUMP
^^^^^^^