Installation Guide

If copying/pasting, eye-drop this text to
ensure a uniform look for all installation
paragraphs.
10/1/08
55411
1. Locate the vehicle's taillight wiring under the
bumper or along the left side framerail.
2. Using a test lamp identify the corresponding
wires in the harness for the left turn, right turn,
taillights.
3. Using wire taps, attach the 4 wires of the
harness to the corresponding vehicle harness
wires identified in step 2 as indicated.
Brown Wire: Tail Light Circuit
Yellow Wire: Left Turn/Brake Circuit
Green Wire: Right Turn/Brake Circuit
White Wire: Ground
4. Secure the harness wires to the vehicle using cable
ties.
TESTING PROCEDURE
-If testing with a circuit tester, attach the ground lead
of a circuit tester to the exposed ground terminal of
the 4-flat end. Activate the tow vehicle’s left turn,right
turn, tail and stop lights one at a time. Probe the three
receptacles of the 4-flat end to confirm proper
functionality.
-If testing with a trailer, mate 4-flat with trailer and run
the same test as the circuit tester using the trailer
lights. If a function on the trailer lights does not work
properly, disconnect the trailer 4-flat, turn functions on
vehicle off and recheck function with a circuit tester. If
functionality is good, check the trailer for potential
problems.
WARNING !
Verify miscellaneous items that may be hidden behind
or under any surface before drilling to avoid damage
to vehicle and/or personal injury .
CHEVY ASTRO
CHEVY BLAZER S10
GMC ENVOY
GMC JIMMY S10/S15
GMC SAFARI
OLDSMOBILE BRAVADA
VEHICLE WIRE
HARNESS WIRE
TO SPLICE INTO WIRES, PUSH METAL
LOCK DOWN WHEN WIRES ARE FULLY
INSERTED