Intermittent wipers not working?

Tiny
MATTY CARROLL
  • MEMBER
  • 1999 FORD F-250
  • V8
  • 4WD
  • AUTOMATIC
  • 130,000 MILES
Wipers work sometime. Installed new wiper motor, all fuses good
Monday, September 27th, 2010 AT 6:15 PM

4 Replies

Tiny
TECH1FORD
  • MEMBER
  • 102 POSTS
It is the multifunction switch that controls the wiper and high beams, turn signals replace that and it will be fixed. Here is how in the diagrams below.
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Wednesday, September 29th, 2010 AT 2:11 AM
Tiny
MARKSMANBBS
  • MEMBER
  • 3 POSTS
I had this issue, got the switch did not change it had to get a new wiper motor as well FYI.
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Tuesday, January 28th, 2020 AT 12:02 PM
Tiny
SHANEMN
  • MEMBER
  • 1 POST
That did not fix the problem. All the common relays and fuses are good. A new multifunction switch didn't help. Where's the 14pin wiper relay?
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Friday, March 13th, 2026 AT 10:32 AM
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 55,481 POSTS
Yep, that is because the problem is the wiper control module behind the left side of the dash. You need to remove the engine cover to get at it. Check out the images (below). Let us know if you need anything else. Ken
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Saturday, March 14th, 2026 AT 10:54 AM

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