The following is from this tsb:
WINDSHIELD WIPERS—FRONT WIPERS OPERATE Article No.
WHILE SWITCH IS IN “OFF” POSITION 00-9-6
FORD: 1999 TAURUS
1999-2000 MUSTANG, EXPLORER, F-150, F-250 LD, RANGER, WINDSTAR
2000 EXCURSION
MERCURY: 1999 SABLE
1999-2000 MOUNTAINEER
This TSB is being republished in its entirety to INSTRUMENT PANEL COMPONENTS, FRONT
revise the vehicles affected and to update the WIPER MOTOR AND MULTIFUNCTION SWITCH
Service Procedure. DURING INSTALLATION. CHECK THE
MULTIFUNCTION SWITCH CONNECTION
This TSB applies to the following vehicles only: CLOSELY FOR LOOSE CONNECTIONS,
Explorer, Mountaineer and Ranger 4X2 Without TERMINALS, AND TERMINAL PUSH OUTS. DO
Power Windows built through 9/12/1999 NOT ATTEMPT A CONTINUITY CHECK OR
PROBE THE CIRCUITS OF THE WIRE HARNESS.
Excursion built through 8/25/1999
If non-wiper related symptoms are present, perform
F-150/250, Mustang, Windstar, Taurus/Sable built diagnostics per the appropriate Workshop Manual.
through 8/16/1999
If the uncommanded wiper operation condition is
ISSUE present and no other symptoms apply to the vehicle
The front windshield wipers may operate while the being serviced, install a revised multifunction switch.
multifunction switch is in the OFF position on some Refer to the Multifunction Switch Application Chart
vehicles. This may be caused by a resistance drift for the applicable switch.
in the multifunction switch or a partially plugged-in
connector. NOTE
MAKE SURE THAT ALL CONNECTIONS ARE
ACTION FULLY SEATED DURING INSTALLATION. DO
If the uncommanded wiper operation condition is NOT ATTEMPT TO REPAIR THE VEHICLE BY
present and all wiper related connectors are fully REPLACING THE GEM OR THE WIPER
seated, install a revised multifunction switch. Refer CONTROL MODULE.
to the following Service Procedure and the
Multifunction Switch Application Chart for the Using Worldwide Diagnostic System (WDS), New
applicable switch. Generation Star (NGS) Tester or Service Bay
Diagnostic System (SBDS), run GEM or CTM.
SERVICE PROCEDURE Retrieve and clear continuous Diagnostic Trouble
NOTE Codes (DTCs) and run On-Demand Self-Test to
make sure that no valid DTCs are set. DO NOT ATTEMPT TO REPAIR THE VEHICLE
BY REPLACING THE GENERIC ELECTRONIC
MODULE (GEM) OR THE WIPER CONTROL
MODULE.
NOTE
MAKE SURE THAT ALL CONNECTIONS ARE
FULLY SEATED TO THE GEM, CENTER
PAGE 1
Article No. 00-9-6 Cont’d.
MULTIFUNCTION SWITCH APPLICATION
Multifunction Switch
Model Year Vehicle Service Part Number
1999/2000 Explorer/Mountaineer 4X2 without YL5Z-13K359-AAA
Power Windows
1999/2000 Ranger 4X2 without Power Windows YL5Z-13K359-AAA
2000 Excursion YL1Z-13K359-AAA
1999/2000 F-150/250 LD YL3Z-13K359-ABA
1999/2000 Mustang YR3Z-13K359-AAA
1999 Taurus/Sable XF1Z-13K359-AAC
1999/2000 Windstar YF2Z-13K359-AAA
PART NUMBER PART NAME
YL5Z-13K359-AAA Multifunction Switch
(Explorer/Mountaineer, Ranger)
YL1Z-13K359-AAA Multifunction Switch (Excursion)
YL3Z-13K359-ABA Multifunction Switch (F-150/250 LD)
YR3Z-13K359-AAA Multifunction Switch (Mustang)
XF1Z-13K359-AAC Multifunction Switch (Taurus/Sable)
YF2Z-13K359-AAA Multifunction Switch (Windstar)
SUPERSEDES: 99-24-3
WARRANTY STATUS: INFORMATION ONLY
OASIS CODES: 202000, 203000