Load Testing A Battery Or Ignition Feed Circuit And Ground Circuit

DIAGNOSTIC LOAD TEST (BATTERY FEED & GROUND CIRCUIT) 

Fig 1: Performing Diagnostic Load Test (Battery Feed & Ground Circuit)

Courtesy of CHRYSLER GROUP, LLC

1. Disconnect the connector from the device(s) to gain access and isolate the terminal for the circuit being tested.
2. Using an approved connector back probe tool, connect the positive lead of the load test tool to the circuit being tested at point (A).
3. Using an approved connector back probe tool, connect the negative lead of the load test tool to the circuit being tested at point (B).
   CAUTION:

   Use only approved connector back probe tools when back probing a connector so as not to cause damage to the terminals or insulation of the connector. Damage to the terminals can cause poor terminal contact or retention. Damage to the insulation can introduce corrosion due to water infiltration.

   Does the bulb light bright, when compared to a direct battery connection?

   Yes 

   • The circuit being tested can carry a load, check other circuits, connectors and terminals for concerns.

   No 

   • Test the circuits individually to determine which circuit is the cause of the test failure.
   • Repair the circuit, connector or terminal that has an open or excessive resistance.
   • Perform any related Recalls or Technical Service Bulletins (TSBs) that may apply.