Keyless on a big Isuzu box truck

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=49597
Printed Date: September 16, 2025 at 6:16 PM

Topic: Keyless on a big Isuzu box truck

Posted By: Fosgate3
Subject: Keyless on a big Isuzu box truck
Date Posted: February 07, 2005 at 9:55 PM

I have been asked to put in a keyless system (Ungo) on a 2004 Isuzu NPR 3500 series box truck. Has anyone ever done one of these? Anything interesting or unusual about them?

Replies:

Posted By: draasch
Date Posted: February 08, 2005 at 2:18 PM

i haven't donme one....take pics if you can.....

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Good Luck
David
Ace Security
813-376-9778
Tampa
Donate to the 12volt

Posted By: Fosgate3
Date Posted: February 08, 2005 at 3:33 PM

I will be glad to do this if I can get my hands on a digital cam. The question is: what should I use as a wiring diagram? are isuzu's colors for the 2004 pretty much the same as chevy? I can go in blindly but I am trying to avoid taking all day to do it. Also, what about relays? what relay configuration would I *typically* expect to see?

Posted By: jaurora
Date Posted: February 08, 2005 at 3:48 PM

I looked up what I had stored away for tech sheets but all the 2004 isuzu sheets I have looked at show the same wire color and same location. Im not sure if this will be the same but you can try. Be sure to meter the wires first.

Power Lock:		Lt.GREEN/ Red (-)	Either kick panel**
Power Unlock:		RED / Blue (-)	Either kick panel

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MECP certified (If it really means anything)
Jeremy

Posted By: Fosgate3
Date Posted: February 13, 2005 at 2:00 PM

Okay.... well i just got done with the keyless and it was simple. In this truck, the lock/unlock switch is located at the left side of the steering column. Once you pop the switch out (stick your hand under the dash and push it outward), there are three wires attached. A RED / black, GREEN/ black, and solid black. I connected the Ungo lock and unlock wires there... RED / black is lock, GREEN/ black is unlock. The lock system is a negative trigger so it was really simple... no relays needed.

Everything works great and I appreciate all who contributed and took the time to read this.

~Fos~