Main Relay

Remove main relay from junction box. Check for continuity between relay terminals No. 2 and 4. SeeFig 1. Continuity should not exist. Apply battery voltage to relay terminal No. 1 and ground relay terminal No. 3. Continuity should exist between relay terminals No. 2 and 4. If relay does not test as described, replace relay.

Fig 1: Identifying Main Relay Terminals (Trooper)

Courtesy of ISUZU MOTOR CO.