• If you currently own, previously owned or want to own an Avalanche, we welcome you to become a member today. Membership is FREE, register now!

Viper 3000 Help Needed! 71 Firebird


Full Member
Mar 6, 2005
I'm out of ideas and hope one of my Avy buddies can help!

I've installed power locks in the car.  They are activiated by providing a ground to the relays (ground one wire for lock and the other wire for unlock).  I've found the wires on the Viper that provide 12+ when lock and unlock are pressed but I'll be damned if I can find wires that provide a ground.

I've got to be missing something here, I can't believe there would not be provisions for a grounded type door system.

Any help????????

If the alarm can not be programmed to change it to a ground then you will have to use two (one for lock and one for unlock) more relays to change the polarity.


  • relay polarity change.JPG
    relay polarity change.JPG
    53.5 KB · Views: 23
Thanks, probably going to be my best shot if I can't get a installer to program it for me.