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Saturday, October 25, 2025 • Copyright © 1999-2025 the12volt.com, All Rights Reserved • Privacy Policy & Use of Cookies
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verify all wire colors and diagrams before applying any information.





Heres what I have for the trucks wiring..
1999 Chevrolet Tahoe Car Alarm Wiring Color Codes
Battery Constant 12v+ Positive Wire (+): Red
Battery Constant 12v+ Positive Wire Location: Ignition Switch Harness
Starter Positive Wire (+): Yellow
Starter Positive Wire Location: Ignition Switch Harness
Ignition Positive Wire (+): Pink
Ignition Positive Wire Location: Ignition Switch Harness
Second Ignition Positive Wire (+): White (This wire must be connected as ignition #2 for remote starting.)
Second Ignition Positive Wire Location: Ignition Switch Harness
Accessory Positive Wire (+): Orange
Accessory Positive Wire Location: Ignition Switch Harness
Parking Light Positive Wire (+): Brown
Parking Light Positive Wire Location: At Headlight Switch Or In Drivers Kick Panel
Power Door Lock Negative Wire (-): Light Blue (Type A). If vehicle is a 2-Door, door locks are a (Type”C”) If vehicle is a 4-Door, door locks are a (Type “A”).
Power Door Lock Negative Wire Location: In Either Door Harness
Power Door Unlock Negative Wire (-): White (Type A). If vehicle is a 2-Door, door locks are a (Type “C”) If vehicle is a 4-Door, door locks are a (Type “A”).
Power Door Unlock Negative Wire Location: In Either Door Harness
Door Trigger Negative Wire (-): Purple
Door Trigger Negative Wire Location: At Headlight Switch
Domelight Supervision Wire (-): White (Requires Relay)
Domelight Supervision Wire Location: At Under Dash Light
Trunk Release Positive Wire (+): Black or BLACK/ White (If the vehicle has a rear lift gate, it is a (+) positive and if it has rear cargo doors, it is a 5 wire system. Requires Relay.)
Trunk Release Positive Wire Location: Low In Drivers Kick Panel
Horn Negative Wire (-): Black
Horn Negative Wire Location: At Steering Column Harness
Any advisement?

