1. Checking the conductivity of the relay circuits.
A) Check for continuity between terminals 1 and 2.
b) Check for continuity between terminals 3 and 4.
V) Check for continuity between pins 1 and 3.
If the test fails, replace the relay.
2. Checking the operation of the relay.
A) Connect the battery to terminals 1 and 2 of the relay.
b) Check for continuity between terminals 3 and 4.
V) Check for continuity between pins 1 and 3.
If the test fails, replace the relay.