Lighting Modifications All Models Disconnecting Daytime Running Lights 1. Shut down the engine, set the parking brake, and chock the tires. 2. Disconnect the negative leads from the batteries. 3. Remove the four screws that secure the instrument panel, then pull the top of the panel forward to access instrument panel wiring. 3A. On vehicles with fixed steering columns, remove the bolts that hold the steering column to the dash assembly to lower the steering column for access. 4. Disconnect the light gray PECV connector from the left-hand side of the Electronic Control Center ( ECC ). 5. Find wire labeled LB08A in cavity A10 , and remove it using a connector tool. 6.
Tag the wire with that location for future reinstallation. 7. Heat shrink or wrap the terminal end of the wire with electrical tape to prevent unintended connection, then secure the wire back to the harness with a tie-strap. 7. Connect the PECV connector to the left-hand side of the ECC . 8. Disconnect the dark gray PECP connector from the left-hand side of the ECC . 9. Find wire labeled HL08H (this wire may also be labeled HL05B in later models) located in in cavity G , and tag the wire with that location for future reinstallation. 10.
Remove the wire from the connector, wrap the terminal of the wire with electrical tape to prevent unintended connection, then secure the wire back to the harness with a tie-strap. 11. Connect the PECP connector to the left-hand side of the ECC. 12. Position the instrument panel and install the screws. If the steering column was lowered, position it into place, and tighten the steering column capscrews 17 lbf·ft (23 N·m). 13. Connect the batteries. 14. Verify correct operation of the lights. Turn Signal and Brake Override Circuit Elimination Western Star Trucks turn signal switches are equipped with a brake override circuit.
This circuit is designed to deactivate the 4-way flashers when the brakes are applied. In some vocations, customers prefer that the 4-way flashers remain flashing during use of the service brakes. To disable this feature, the red jumper wire located in the turn signal switch housing, used to activate this circuit needs simply to be cut and the ends taped or heat shrunk to remove this function. Both methods of wiring comply fully with Canada and USA regulations. Red Jumper Wire Installing Aftermarket LED Tail lights Adding LED Tail Lights requires the addition of a 2 W 560 OHM resistor to ensure that the system consumes enough amperage for the system to function properly.
Use the splice instructions below for installation of the aftermarket resistor. White - Amber LED Panel Spl -1 RED LED Panel Brown - RED LED Panel RED LED Panel White - LED Side Marker 2W 560 OHM Green - Ground Resistor RED Turn Signal Power Spl -2 Spl -3 Black - Amber LED Panel Black Park lite Power Black - LED Side Marker Black - Red LED Panel Page 1A-24 Rev (2.3) - Feb 2015 PECV Connector (Blue) PECP Connector (Black) ECC Electronic Control Center ECC Electronic Control Center ECC Elect Cont Cent PECP Connector (Black) ECC Elect Cont Cent ronic rol er