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80s-90s GM Type C Locks Wire Color

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Gold - Posts: 643
Gold spacespace
Joined: May 27, 2011
Location: California, United States
Posted: April 04, 2024 at 9:08 PM / IP Logged Link to Post Post Reply Quote davep.
I figured this out on my own. Here are my notes that are going on my shop wall:
BLUE: UNlock
TAN: Motors, (+) UNlock
GRAY: Motors (+) Lock
For All-doors lock/unlock:
Grn/Blk (#30) and Wht/Blk (#87a) Which are LOCK to the Black car wires
Blu/Blk (#30) and Brn/Blk (#87a) Which are UNlock to the Lt Blue car wires.
If you want 2nd Unlock: The blu/blk and brn/blk have to go in the tan wire to the driver's lock motor, the add-on relay goes in the tan wire for the passenger lock motor

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Thursday, May 30, 2024 • Copyright © 1999-2024, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

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