A) check for continuity between terminals 1 and 3 of the relay.
b) Check for continuity between terminals 2 and 4 of the relay.
2. Checking the operation of the relay.
A) connect battery power to terminals 1 (+) and 3 (-) relay.
b) check for continuity between terminals 2 and 4 of the relay.
Checking the parking brake
1. Checking the operation of the indicator lamp «Brake».
A) Disconnect the brake fluid level switch connector. Ground the connector terminal.
b) turn on the ignition: the indicator lamp should be on.
If not, remove and check the lamp.
2. Checking the operation of the parking brake switch.
(YY, YH series)
A) check for continuity between the switch terminals with the parking brake lever raised.
b) check for continuity between the switch terminals with the parking brake lever down.
(series LY, LH)
Check the switch circuits according to the table.
If the continuity of the circuits is not as specified, replace the switch.