Feed Circuit Test

Volt Ampere Tester:

The following procedure will require a suitable volt/ampere tester.

CAUTION: Fuel and Ignition system must be disabled to prevent engine from starting while performing any of the following tests.

Volt-Ampere Tester Connections:

1. Connect a volt-ampere tester to the battery terminals. Refer to the operating instructions provided with the tester being used.
2. Disconnect the Automatic Shut Down (ASD) relay, and the ignition and fuel system will be disabled. The ASD is located in the Power Distribution Center (PDC). Refer to the PDC cover or Wiring Diagrams Power Distribution for location of the relay.
3. Verify that all lights and accessories are OFF, and set parking brake.

Starter Draw Tests:

4. Rotate and hold the ignition switch in the START position. Observe the volt-ampere tester.
- If voltage reads above 9.6 volts, and amperage draw reads above 250 amps, go to the Starter Feed Circuit Resistance Test.
- If voltage reads 12.4 volts or greater and amperage reads 0 to 10 amps, go to Starter Control Circuit Test.

CAUTION: Do not overheat the starter motor or draw the battery voltage below 9.6 volts during cranking operations.

5. After the starting system problems have been corrected, verify the battery state of charge and charge battery if necessary. Disconnect all testing equipment and connect all cables, wires, and ASD relay that were disconnected. Start the vehicle several times to assure the problem was corrected.