91 Bonneville LE - Alarm System Installation - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

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Old 03-25-2007, 03:17 PM   #1
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Default 91 Bonneville LE - Alarm System Installation

I've been installing an alarm system in my car since its been broken into the 3 times in the past 4 years, and the last time (about a month ago) it was stolen and not found for about 2 weeks.

The install has been going fine but I have been having some trouble finding the power door lock wires once they enter the vehicle. I even own the factory repair manual but that doesn't do much as far as telling me where to look for the wires.

So I was wondering if anyone else has tapped into these power door lock system and would be able to give me advice in finding the wires?
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Old 03-25-2007, 04:00 PM   #2
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Oh this is going to be interesting....

A lot of the wires are run under the dash... But depending on where you are going to install the wires you may have an easier time...

I installed a keyless entry system from a 94 Blazer into my 91 Bonneville LE... I had to hunt for the wires and ended up tapping into the wires at the bottom of the A pillar covered by the carpet...

Here at this point I had tapped into the Lock and Unlock wires, and borrowed the 12v constant from the lock circuit for the keyless module.... You will be able to tap into these wires, unless you want to try and tap in at the Lock Relay

Below Pic... This should be the location of the door lock relay behind the glove box... The wires were a lot shorter than I wanted for my wiring purposes so I decided to go with the wires on the A Pillar...

Hope that helps

Also will your alarm system have keyless functions, or be the reason for the lock wires?

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Old 03-25-2007, 09:02 PM   #3
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When I installed the optional factory keyless entry, I used the wiring at the lock/unlock relay, so I would just tap in to the wires there, its much easier. Also, that way you don't risk a short circuit down near the floor where your connections might get wet. At the lock relay you want the light blue and thin black wires. The heavy black wire there is a good place for ground, as is the Orange/black wire a good place for a constant +12, and by going to this wire, your additional wiring should be protected by the fuse that runs the lock circuit.
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