Control Switch
NOTE:
In following testing procedures, reference is made to primary wire colors only.
- Disconnect six-way connector at amplifier. Check battery voltage at It. blue wire when "ON" switch is depressed. Battery voltage should be available from It. blue wire leading from control switches.
- Connect an ohmmeter between blue wire and ground. Check wire for continuity to ground when the "OFF" switch is depressed. If a resistance higher than 1 ohm is found, the wiring, slip rings, or switch is at fault, or steering column is not properly grounded. To check steering column ground, connect an ohmmeter to good body ground and steering column upper flange. Resistance should be less than 1/2 ohm. Rotate steering wheel and if equipped with tilt column, move up and down. If resistance higher than 3 ohms is noted, clean horn brush contacts and ground brush. A resistance less than 1 Ohm must be obtained before performing remaining tests.
- With ohmmeter connected between blue wire and ground, depress set-speed switch. A reading of approximately 680 ohms should be indicated on ohmmeter. Depress coast switch, a reading of approximately 120 ohms should be indicated on ohmmeter.