Relay Test

The starter relay is located in the Power Distribution Center (PDC) in the engine compartment. Refer to the PDC label for relay identification and location.

Remove the starter relay from the PDC as described to perform the following tests:

1. A relay in the de-energized position should have continuity between terminals 87A and 30, and no continuity between terminals 87 and 30. If OK, go to Step 2. If not OK, replace the faulty relay.
2. Resistance between terminals 85 and 86 (electromagnet) should be 75 +/- 5 ohms. If OK, go to Step 3. If not OK, replace the faulty relay.
3. Connect a battery B+ lead to terminals 86 and a ground lead to terminal 85 to energize the relay. The relay should click. Also test for continuity between terminals 30 and 87, and no continuity between terminals 87A and 30. If OK, refer to RELAY CIRCUIT TEST  procedure. If not OK, replace the faulty relay.
   Fig 1: Identifying Starter Relay

   Courtesy of DAIMLERCHRYSLER CORP.
   Fig 2: Identifying Relay Terminals And Cavities

   Courtesy of DAIMLERCHRYSLER CORP.
   Fig 3: Identifying Starter Relay Pinout

   Courtesy of DAIMLERCHRYSLER CORP.
   Fig 4: Cab Function Table

   Courtesy of DAIMLERCHRYSLER CORP.