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System in the Specifications section of this group for (1) Remove the starter motor from the vehicle. Refer to Starter Motor in the Removal and Instal- (2) Mount the starter motor securely in a soft- jawed bench vise. The vise jaws should be clamped (3) Connect a suitable volt-ampere tester and a 12-volt battery to the starter motor in series, and set (4) Install a jumper wire from the solenoid termi- nal to the solenoid battery terminal. The starter (5) Adjust the carbon pile load of the tester to obtain the free running test voltage. Refer to Start- (6) Note the reading on the ammeter and compare this reading to the free running test maximum (7) If the ammeter reading exceeds the maximum amperage draw specification, replace the faulty STARTER SOLENOID This test can only be performed with the starter motor removed from the vehicle. (1) Remove the starter motor from the vehicle. Refer to Starter Motor in the Removal and Instal- (2) Disconnect the wire from the solenoid field coil terminal. (3) Check for continuity between the solenoid ter- minal and the solenoid field coil terminal with a con- (4) Check for continuity between the solenoid ter- minal and the solenoid case (Fig. 8). There should be STARTER RELAY The starter relay (Fig. 9) is located in the Power Distribution Center (PDC), in the engine compart- (1) Remove the starter relay from the PDC. Refer to Starter Relay in the Removal and Installation (2) A relay in the de-energized position should have continuity between terminals 87A and 30, and (3) Resistance between terminals 85 and 86 (elec- tromagnet) should be 75 6 5 ohms. If OK, go to Step 4. If not OK, replace the faulty relay. Fig. 7 Continuity Test Between Solenoid Terminal and Field Coil Terminal - Typical 1 – SOLENOID Fig. 8 Continuity Test Between Solenoid Terminal and Solenoid Case - Typical 1 – SOLENOID 8B - 8 STARTING SYSTEMS WJ DIAGNOSIS AND TESTING (Continued) |