Test 5: ASCD Steering Switch Check

Check ASCD Steering Switch Circuit For ASCD Control Unit

Turn ignition switch to LOCK position. Disconnect ASCD control unit harness connector. Turn ignition switch to RUN position. Turn ASCD MAIN switch on. Measure voltage between ground and specified ASCD control unit harness connector terminals. See ASCD STEERING SWITCH VOLTAGE SPECIFICATIONS table. See Figure . If voltage is as specified, ASCD steering switch is okay. If voltage is not as specified, go to next step.

Check ASCD Steering Switch Power Supply

Press horn button. If horn does not operate, go to next step. If horn operates, check ASCD steering switch. See SWITCHES under COMPONENT TESTS. Replace switch if faulty. If ASCD steering switch is okay, check for an open or short in harness between ASCD steering switch and ASCD control unit.
Check for a faulty fuse No. 54 (10-amp), located in power distribution box in engine compartment. Also check for a faulty horn relay, or open/shorted condition between relay and fuse. See WIRING DIAGRAMS .

ASCD STEERING SWITCH VOLTAGE SPECIFICATIONS