Removal and installation
1. Disconnect a wire from the negative plug of the storage battery.
2. Remove the glow plug relay as shown.
3. Install in reverse order.
Examination
1. Check for presence between pins "A" And "IN" and lack of conduction between the terminals "WITH" And "ABOUT".
2. Apply battery voltage to terminal "A" and weight on "IN". Check for continuity between terminals "WITH" And "ABOUT".
If the result is not as described, replace the relay.