Ford Repair Questions? Ask a Mechanic for Answers ASAP
I would like to pay for the original answer because the expert provided me with the wiring diagram I asked for. I am reluctant to do so since the problem I was working on still exists and there is no one helping me to further address the problem. Who can help me out?
Let's give it a shot. I was thinking, I might put the replacement motor on a bench test and supply +12V to the appropriate points and then a common signal as an input just to try and rule out the motor assembly. It is still confusing as to why with certain switch assy inputs that there are some relays clicking in the motor assy but there is no movement.
I would be willing to take some direction/info to test the wiring.
SERVICE KIT AVAILABLE FOR WIPER MOTOR WIRINGTECHNICAL SERVICE BULLETINReference Number(s): 05-18-8, Date of Issue: September 19, 2005FORD:2002-2004 Excursion; 2002-2006 F-Super Duty
Related Ref Number(s): 05-18-8ARTICLE BEGINNINGDESCRIPTIONSERVICE KIT AVAILABLE FOR WIPER MOTOR WIRINGISSUEA new service pigtail kit is now available for servicing the 2002-2006 F-Super Duty and 2002-2004 Excursion wiper motor.ACTIONInstall wiper motor service pigtail kit, follow the instruction sheet provided in the kit. Remove wiper mounting arm and pivot shaft following Workshop Manual Section 501-16. Do not replace the 12A581 wiring harness. For additional information on how to properly splice or repair wiring, refer to TSB 05-18-7 .PARTS INFORMATIONPARTS INFORMATIONPart NumberPart Name5U2Z-14S411-KAWiring Pigtail
OTHER APPLICABLE ARTICLES05-18-7 WARRANTY INFORMATIONWARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage.WARRANTY INFORMATIONOperationDescriptionTime051808A2002-2006 F-Super Duty And 2002-2004 Excursion: Install Windshield Wiper Motor Electrical Connector Pigtail (Includes Time To Remove And Install Windshield Wiper Mounting Arm And Pivot Shaft) (Do Not Use With 17526A, 17508A)1.5 Hrs.
DEALER CODINGBasic Part No.Condition Code14B47542
This is all i found on software for the wipers. I will keep looking. It puzzles me. jim
Intermittent Speed Windshield WipersThe intermittent wiper speed is activated with grounds controlled by the multifunction switch inputs to the windshield wiper motor module. The windshield wiper motor module then activates the windshield wiper run/park relay coil and switches voltage through the windshield wiper high/low relay. The high/low relay remains deactivated supplying the voltage to the wiper motor low speed input and activates the windshield wiper motor. When the windshield wiper motor module receives the grounded input, the motor continues to operate until Hall effect senses magnet to turn off run/park sense the output to the windshield wiper run/park software, deactivating the relay and disconnecting voltage to the wiper motor. The windshield wipers remain parked until the windshield wiper motor module completes a time-out and then repeats the intermittent windshield wiper cycle.Speed Dependent Windshield WipersThe windshield wiper motor module responds to the windshield wiper control commands by interpreting inputs from the ABS system. The speed dependent wipers will compensate for the extra moisture that accumulates on the windshield at higher speeds, except when the multifunction switch is in the INT 1 position. At higher speeds, the speed dependent feature shortens the delay between wipes when using the variable interval wipers. Delays will automatically adjust at speeds between 16 and 105 km/h (10 and 65 mph).
Thanks for helping so far, Jim. I also had found that same information in the diagnostics and testing document that we got from a Ford shop tech. What are your thoughts on this...
Since this is a ground switching system, what if the ground wire tests very good under no load condition(When the wiper switch is not on) but breaks down once the load is engaged(Wiper switch on). This same theory could also be occurring with the 12v supply lines. As I have stated before, with the motor disconnected all 12v lines and ground lines test very good. I can only test them with the harness disconnected from the motor. I might try and put a load on the test points, such as a 12v lamp, and then measure the voltage. If it is dropping, that would explain that although the relays seem like they are clicking, they might not have enough current to completely pull the coils in and make the contacts.
It was the Hot 12 v from the fuse panel (#54). It must have been pulling down while the motor was connected and not fully energizing the relay coils. We ran a new fused hot wire to the motor and all is well. Thanks for your help with this problem. Reply to this message and I will get you paid.