Switch, Multi-Function

The multi-function switch is a combination turn signal, dimmer switch which has a number of on/off switches packaged as a single unit. Testing for electrical malfunctions can be accomplished with a continuity tester. Malfunctions can be determined by checking continuity between the feed and function terminals of the switch.

Prior to testing, make sure hazard switch is pushed in fully to the OFF position. If the suspect circuit is satisfactory, the concern is elsewhere in the system.

MECHANICAL MULTI-FUNCTION SWITCH DIAGNOSIS

CONDITION	TEST STEP	ACTION
Turn Signal Lever Will Not Stay in the LH/RH Turn Positions	With steering wheel locked in the straight ahead position, move the lever to the RH and LH turn position to the neutral position.	If lever does not stay in either turn position, the switch is damaged or worn. Replace switch. NOTE: If lever stays in the turn position, verify that there is an effort required to manually move the lever from either the LH or RH turn position to the neutral position.
Turn Signal Lever Cancels Before Steering Wheel Returns From The Desired Turn Position	Road test vehicle to verify condition.	If lever cancels before steering wheel return, the switch is damaged or worn. Replace switch.
Turn Signal Lever Will Not Cancel When Steering Wheel Returns From the Desired Turn Position	Check effort to switch from high beam to low beam and the effort to manually cancel turn signal lever from a turn position.	If effort required to switch from HIGH BEAM to LOW BEAM is less than manually cancelling turn signal lever from a turn position, switch is damaged or worn. Replace switch.
Headlamp Dimmer Switch Does Not Stop in LOW BEAM Position After The Flash-to-Pass Function is Operated	Gently pull turn signal lever to the FLASH-TO-PASS position and release.	If lever stops in the LOW BEAM position, switch is good. If lever travels beyond LOW BEAM position, the switch is damaged or worn. Replace switch.
Headlamp Dimmer Switch Does Not Return to LOW BEAM Position after the Flash-to-Pass Function is Operated	Gently pull turn signal lever to the Flash-to-Pass position and release.	If lever does not return to the LOW BEAM position, the switch is damaged or worn. Replace switch.
Turn Signal Lever is Loose	Move turn signal lever from LOW BEAM to HIGH BEAM and back to LOW BEAM.	If looseness is felt in the lever, the switch is damaged or worn. Replace switch.
Windshield Washer Switch Knob Does Not Return from the WASH Position	With ignition lock cylinder in the OFF position, push the washer switch knob to the ON position and release.	If washer switch knob does not return to the OFF position, the switch is damaged or worn. Replace switch.
Windshield Wiper Switch Knob Rotates Easily From OFF, LO, HI or the INTERVAL Position During Turn Signal or Headlamp Dimmer Operation	Position finger on top of knob parallel to steering column. Gently pull finger back toward steering wheel and push down on lever toward LH turn position. Check each position, HI, LO, OFF and INTERVAL positions.	If knob rotates from any of the positions, switch is damaged or worn. Replace switch.
Windshield Wiper Switch Knob Rotates Past the HI AND MAX Interval Stop	Slowly turn knob to the HI stop and then to MAX interval stop. Observe and feel where knob stops.	If knob rotates past the HI position without a noticeable stop and/or past the MAX interval stop, the switch is damaged or worn. Replace switch.