Checking the headlight washer switch
1. Check for continuity between terminals "2" And "3" (backlight) in both switch positions.
2. Check for continuity between terminals "1" And "4" in the on position and no conduction in the off position.
Checking the headlight washer relay
1. Check for continuity between terminals "2" And "5".
2. Connect "+" battery to terminals "1" And "5", "-" to the conclusion "3".
3. Connect "-" batteries to output "4" and check for continuity between the terminals "2" And "5" for 0.4-0.6 seconds, then no conduction.
Checking the headlight washer motor
Connect "+" battery to the output "1", "-" to the conclusion "2", check the operation of the motor.
Attention: do not turn on the electric motor for a period of time exceeding 3-5 seconds, otherwise the winding may burn out.