Control Switches

First, check main feed fuse and stoplamp fuse. If these fuses are OK, proceed with test. Disconnect the 6-way connector at the amplifier assembly. Perform the following checks:

1. Connect a voltmeter between the light blue-black hash lead (151) and ground. Depress th ON button and check for battery voltage.
2. Connect an ohmmeter between the light blue-black hash lead (151) and ground.
3. Rotate the steering wheel throughout its full range while making the following checks: a) Depress the OFF button and check for a reading between 0 and 1 ohm. b) Depress the Set Accel button and check for a reading between 714 and 646 ohms. c) Depress the Coast button and check for a reading between 126 and 114 ohms. d) Depress the Resume button and check for a reading between 2090 and 2310 ohms.

If resistance values are within specification, but needle fluctuates, remove the steering wheel and clean the brushes and slip ring surfaces. Apply ESA-M1C189-A uniformly, approximately 0.5mm thick to slip ring.

If resistance values are above the allowable limits, check the switch assemblies and ground circuit.

Reconnect the 6-way connector at the amplifier.