Main Switch Test
- Turn ignition on. Check voltage between fuse No. 18 and ground. Voltage should be 10-13 volts.
- Remove main switch and disconnect harness connector. Turn ignition on. Check voltage between ground and main switch harness connector terminal No. 3 (Blue wire). See Fig 1
. Voltage should be 10-13 volts.
- To check function of main switch, check resistance between main switch harness connector terminals No. 3 and 5. See Fig 2
. Resistance should be less than 10 ohms with switch on and greater than one megohm with switch off.
- To check harness between main switch and control unit, reconnect harness connector. Turn ignition and main switch on. Check voltage by backprobing between specified terminals and ground: Terminals No. 3 (Blue wire) and No. 5 (Green/Blue wire) at main switch harness connector and terminal No. 3 (Blue wire) and No. 4 (Green/Blue wire) at control unit harness connector. Voltage readings should be 10-13 volts. See Fig 3
.
Courtesy of SUBARU OF AMERICA, INC.
Courtesy of SUBARU OF AMERICA, INC.
Courtesy of SUBARU OF AMERICA, INC.