Multi-funtion Switch
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Elder User
Joined: Mar 2004
Posts: 856
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From: Kansas City, Missouri
Multi-funtion Switch
I have newly acquired 2001 F150 Lariat and the wipers wouldn't pulse or turn off unless the vehicle was shut off then restarted. Once back on it was necessary to turn the switch on and off until they were in park position. Replaced the multi-function switch but mistakenly ordered one for a Lightning and not the Lariat. The only thing difference I noticed is that the switch arm curves down and not up. The wipers will now manually shut off but pulse don't work and they won't park, even if on low or high. The question is; is there a wire/control difference between the Lightning and Lariat switch?
Thank you,
Thank you,
Lead Driver
Joined: Sep 2006
Posts: 7,907
Likes: 143
Normally, once you turn the switch off with the wiper motor operated off rest, it has it's own closed switch to keep it running to the rest point then it's switch circuit goes open at the rest point.
During operation, this switch is connected across to keep the motor powered until you shut down the wiper stock control.
All the wipe time and speed functions are controlled from the GEM module, otherwise.
It appears the wiper motor may need to be replaced for self shut down at rest. Or test the motor shut down since it may be a fault from the stock switch keeping the wiper motor powered full time.
Then see if there are any other control issues.
Good luck.
During operation, this switch is connected across to keep the motor powered until you shut down the wiper stock control.
All the wipe time and speed functions are controlled from the GEM module, otherwise.
It appears the wiper motor may need to be replaced for self shut down at rest. Or test the motor shut down since it may be a fault from the stock switch keeping the wiper motor powered full time.
Then see if there are any other control issues.
Good luck.
Thread Starter
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Elder User
Joined: Mar 2004
Posts: 856
Likes: 0
From: Kansas City, Missouri
Normally, once you turn the switch off with the wiper motor operated off rest, it has it's own closed switch to keep it running to the rest point then it's switch circuit goes open at the rest point.
During operation, this switch is connected across to keep the motor powered until you shut down the wiper stock control.
All the wipe time and speed functions are controlled from the GEM module, otherwise.
It appears the wiper motor may need to be replaced for self shut down at rest. Or test the motor shut down since it may be a fault from the stock switch keeping the wiper motor powered full time.
Then see if there are any other control issues.
Good luck.
During operation, this switch is connected across to keep the motor powered until you shut down the wiper stock control.
All the wipe time and speed functions are controlled from the GEM module, otherwise.
It appears the wiper motor may need to be replaced for self shut down at rest. Or test the motor shut down since it may be a fault from the stock switch keeping the wiper motor powered full time.
Then see if there are any other control issues.
Good luck.
Thank you for the input.
Fleet Owner
Joined: Apr 2008
Posts: 24,316
Likes: 5,127
From: 0,0,1
There could be more to the switch being wrong than just the arm. I've seen people use the wrong switch before with bad results even thought it fit and looked the same.
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Elder User
Joined: Mar 2004
Posts: 856
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From: Kansas City, Missouri
Okay, here is the update: Sent the GEM off for testing after Ford confirmed a fault. The module tested out fine. Found rebuilt fuse box, but it didn't fix the problem. Replaced the new multi-function switch with another new switch, when doing this the wires were falling out of the 9 pin connector, which I replaced ($40). Problem still existed. Finally found an old recall for the wiper motor circuit board because it melts (something). Replaced the wiper motor (the only thing left to try) with a $60 rebuilt unit, problem fixed.
Fleet Owner
Joined: Apr 2008
Posts: 24,316
Likes: 5,127
From: 0,0,1
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Elder User
Joined: Mar 2004
Posts: 856
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From: Kansas City, Missouri
So true! And you know once you plug in an electrical part...you own it! Total out of pocket around $400 (including the $50 to Ford for diagnosis), but saved a bundle doing the work myself. Just moving on. 
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