A) Connect the battery to terminals 3 (+) and 2 (-) breaker.
b) Connect a 55 W incandescent lamp to terminals 1 and 2 of the breaker.
V) Check for flashing lamp.
Note: The flashing frequency should be 75-95 times per minute. If there is an open in the circuit of one rear or front indicator lamp, the flashing frequency will be more than 120 times per minute.
If there is an open in the circuit of one lamp of the side repeaters, the blinking frequency will increase from the initial one by about 10 times per minute.
If the test fails, replace the breaker.