Ford P1815: 4x4 Mode Select Short Circuit to Ground

What Does The Ford P1815 Code Mean?

Short to ground sensed by 4X4 control module. Note: The Mode Select Switch (MSS) communicates the operator’s choice to the 4X4 control module. The 4X4 control module then controls the transfer case clutch and transfer case shift motor as necessary.

If the vehicle is not responding to the operator’s intentions, systematically check the necessary inputs and outputs of the 4X4 control module, components of the transfer case and halfshafts. Check all circuits for opens and shorts to power or ground.

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Transfer Case Shift Control Module Compatible with Ford Ranger Pickup Truck New
>>> WEILEITE AWD All Wheel Drive PTO PTU Power Take Off Transfer Case Differential Unit
>>> Detroit Axle - FWD Front CV Axle Shafts Assembly

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

• Pinpoint Test A for P1812 – 1997 F150 & F250
• Technical Service Bulletins SSM 50322 – 2012-2022 F-Super Duty 4×4