Bronco II & Ranger

Check main feed fuse and brake lamp fuse. Replace if necessary. Remove steering wheel cover. With ignition "OFF", connect an ohmmeter to Purple/Orange dashed wire and to Black wire of switch connector at steering wheel. Depress "ON" switch.

Ohmmeter should read 0-1 ohms. If reading is not correct, replace switch assembly. Clean brush assembly and slip rings with solvent and lubricate. Reinstall steering wheel. Connect ohmmeter to Light Blue/Black dashed wire and to Black wire of switch connector. Depress remaining switches and check resistances against table. If values are not correct, replace switch assembly.

CONTROL SWITCH RESISTANCES

Switch Position	Ohms
"OFF"	0-1
"SET ACCEL"	646-714
"COAST"	114-126
"RESUME"	2090-2310

With ignition "OFF". Connect a voltmeter to Blue/Black dashed wire of switch connector. Turn ignition switch to "ON" or "ACC". Voltmeter should read about 7.8 volts. Depress "ON" switch. Voltmeter should read approximately 12.0 volts.
If voltages are correct, switches and wiring are okay. If either voltage reading is not correct, turn ignition "OFF". Disconnect ground brush assembly from wiring harness and connect ohmmeter to White/Purple dashed wire and Black wire at brush assembly pigtail.
Depress "ON" switch. Ohmmeter should read 0-1 ohm. Turn steering wheel while keeping "ON" switch depressed. Check for fluctuations in reading. Connect ohmmeter to Light Blue/White dashed and Black wire at brush assembly pigtail.
Check for resistance values as listed in Control Switch Resistances table. Turn steering wheel while testing and check for fluctuations. If fluctuations are noted, remove steering wheel. Clean and lubricate brushes and slip rings. If no resistances are read, replace ground brush assembly.
If resistances are correct and no fluctuations occur, switches and ground brushes are okay. If replacement of switch assembly does not produce correct results, check slip ring for shorts. If necessary, replace entire wheel assembly and retest.