Feed Circuit Test

Fig 1: Volt Ampere Tester - Typical

Courtesy of DAIMLERCHRYSLER CORP.

NOTE: The following results are based upon the vehicle being at room temperature.

The following procedure will require a suitable volt-ampere tester. See Fig 1.

CAUTION: Before performing any starter tests, the ignition and fuel systems must be disabled.

Check battery before performing this test. Battery must be fully charged.
Connect a volt-ampere tester to the battery terminals. Refer to the operating instructions provided with the tester being used.
To disable the ignition and fuel systems.
Verify that all lights and accessories are OFF, and the transmission shift selector is in the PARK and SET parking brake.
CAUTION: Do not overheat the starter motor or draw the battery voltage below 9.6 volts during cranking operations.
Rotate and hold the ignition switch in the START position. Observe the volt-ampere tester. See Fig 1.
1. If voltage reads above 9.6 volts, and amperage draw reads above 280 amps, check for engine seizing or faulty starter.
2. If voltage reads 12.4 volts or greater and amperage reads 0 to 10 amps, check for corroded cables and/or bad connections.
3. Voltage below 9.6 volts and amperage draw above 300 amps, the problem is the starter. Replace the starter refer to STARTER MOTOR removal.
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 ASD relay. Start the vehicle several times to assure the problem has been corrected.