Manual:HUMMER Hummer H3 Base 2010Page:3316 / 37523



Testing for a Short to Voltage — 2010 Hummer H3 Base, Automatic Service Manual

Testing for a Short to Voltage

Special Tools 

EL 39200:  Digital Multimeter (DMM)

For equivalent regional tools, refer to Special Tools .

CAUTION: Refer to Test Probe Caution .

The following procedure tests for a short to voltage in a circuit.

  1. Remove the power feed (i.e. fuse, control module) from the suspect circuit.
  2. Disconnect the load.
  3. Set the rotary dial of the Digital Multimeter (DMM) to the V (DC) position.
  4. Connect the positive lead of the DMM to one end of the circuit to be tested.
  5. Connect the negative lead of the DMM to a good ground.
  6. Turn ON the ignition and operate all accessories.
  7. If the voltage measured is greater than 1 V, there is a short to voltage in the circuit.