With a Digital Multimeter (DMM)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
- Remove the power feed (i.e. fuse, control module) from the suspect circuit.
- Disconnect the load.
- Set the rotary dial of the DMM to the Ω position.
- Connect one lead of the DMM to one end of the circuit to be tested.
- Connect the other lead of the DMM to a good ground.
- If the DMM does NOT display infinite resistance (OL), there is a short to ground in the circuit.