Diesel Data: Automotive Repair

ICM (Integrated Circuit Module) Relay Box





Inspection

Two Turn Unlock Relay
Check for continuity between the terminals.
1. There should be continuity between the No.18 and No.17 terminals when power and ground are connected to the No.16 and No.17 terminals.
2. There should be no continuity between the No.18 and No.17 terminals when power is disconnected.

Burglar Horn Relay
Check for continuity between the terminals.
1. There should be continuity between the No.8 and No.3 terminals when power and ground are connected to the No.5 and No.6 terminals.
2. There should be no continuity between the No.8 and No.3 terminals when power is disconnected.

ESS Relay
Check for continuity between the terminals.
1. There should be continuity between the No.1 and No.12 terminals when power and ground are connected to the No.2 and No.11 terminals.
2. There should be no continuity between the No.1 and No.12 terminals when power is disconnected.