Normal Operation - With DRL
WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
When the headlamp switch is placed in the HEADLAMPS ON position, voltage is routed to the multifunction switch through circuit 15 (RD/YE). The multifunction switch then routes the voltage to circuit 632 (GY/OG) (high beams) or circuit 13 (RD/BK) which then changes to circuit 1033 (RD/YE) before reaching the DRL relay 3. The DRL relay 3 then routes the voltage to the CJB through circuit 13 (RD/BK). The CJB then routes the voltage to the high beam headlamps through circuit 12 (LG/BK) or to the low beam headlamps through circuits 160 (DB/WH) (LH low beam) and 161 (DG/OG) (RH low beam).
Possible Causes
- Circuit 12 (LG/BK) short to voltage
- Circuit 13 (RD/BK) short to voltage
- Circuit 15 (RD/YE) short to voltage
- Circuit 160 (DB/WH) short to voltage
- Circuit 161 (DG/OG) short to voltage
- Circuit 632 (GY/OG) short to voltage
- Circuit 1033 (RD/YE) short to voltage
- Headlamp switch
- Multifunction switch
- CJB
- Vehicle security module