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Well, this is another fine mess I have gotten myself into....

There was once a Viper Alarm in this truck when I got it. It sucked. I was cause choas in the truck, So I removed it. This was two years ago.

Fast forward to a few weeks ago. I did to get a bunch of stuff fixed or upgraded in the truck before Tellico. I drove the blazer into the garage and started to work. I wired a 220v outlet in to the shop for my new compressor, swapped out the rear lift blocks for springs, converted the rear to disc brakes, etc. Then I started on the electrical. I have had a problem with the old battery isolator so I bought a Painless Dual Battery controller. It was going smoothly until I needed to find hot wire in Start and Run mode only. I climibed in the truck to find my wire. First thing I saw was the rats nest of wires under the dash. I pulled the old stereo and a bunch of wires from an old two way radio install. Then the part were I went stupid... I decided to remove the left over wire from the alarm. Bad plan.

I should Have taken a few pics before starting at least or checked a wiring diagram, but no.

This is what I have now.


http://coloradok5.com/photos/data/500/IM000705.jpg



http://coloradok5.com/photos/data/500/IM000706.jpg

http://coloradok5.com/photos/data/500/IM000707.jpg


I have bought a copy of the 1991 Chevrolet Factory Wiring Diagram but it will not get here in time to make Tellico. Does anyone have a wiring diagram of that block in the first picture for a 1991 7.4L ????

Thanks for any help.

you may now start laughing and pointing fingers at the big dummy.

Sounds like the PO was he dummy....................:mad:

What is/ain't working? :confused:

http://brochures.slosh.com/index.shtml?year.shtml

The PO (AZblazor) was smart, he just added the stereo and two-way radio. The PO before the PO installed the Viper (piece of crap alarm). If I did not get carried away and just removed one wire at a time I would be ok.

http://brochures.slosh.com/index.shtml?year.shtml

I downloaded those and the ones off AutoZones site. I have the Hayes and Chiltons for the 91s but I can not figure out this block.

Here maybe http://www.alldatadiy.com/

Well there is another copy of this post in the Garage. ARAMP1 (http://coloradok5.com/forums/member.php?u=25533) posted two wiring diagrams that are helping.

http://coloradok5.com/forums/showthread.php?t=179011