EFE Relay: Testing and Inspection

Fig. 78 Testing CMH Relay Continuity:

Fig. 79 Testing CMH Relay Operation:

1. Disconnect electrical connector at relay, (located in the no. 2 relay block).
2. Check that there is continuity between terminals 1 and 2, Fig. 78. Terminals 3 and 4 should have NO continuity. Terminals 1 and 4 should have NO continuity.
3. Connect battery voltage across terminals 1 and 2. With relay energized, terminals 3 and 4 should have continuity. Fig. 79
4. If relay fails to perform as outlined, relay is defective.
5. Reconnect electrical connector to relay.