Intermittent Wipers
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Freshman User
Joined: Jun 2002
Posts: 26
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From: Mt. Zion USA
Intermittent Wipers
The intermittent wipers on my '93 F-150 haven't worked well in the 4 years I've owned it. Only the shortest & longest delays and the low and high constant have worked. Now neither of the delay settings work properly. I have heard this is somewhat of a common problem for these trucks and the fix is to replace the turn signal/wiper controller. Does this sound right and what am I looking at in terms of parts ($$) and time?
Thanks,
KJ
Thanks,
KJ
New User
Joined: Feb 2003
Posts: 9
Likes: 0
From: Columbia, Mo
Intermittent Wipers
I had this problem with my 1991 F250, and the little black box that controls this function was going to cost me around $100. What I did was to remove the box and take its cover off. What I discovered is that there is a circuit board that has various electronic pieces attached to it. In looking at it carefully, I discovered that some of the soldered connections had come slightly loose. After fixing these problem areas, and re-installing the unit everything worked great.
Post Fiend
Joined: Nov 2002
Posts: 9,987
Likes: 7
From: Memphis, TN
Intermittent Wipers
'92-up wiper modules are different from pre-'92.
The Wiper Control Module (WCM - mounted to the air duct above & R of the glove box) is known to go bad, but sometimes it's just the MultiFunction Switch (MFS - the turn signal) which is only ~$20 at most parts stores. It's a little more complicated to replace the MFS than the WCM, but you can find both procedures here or in a Haynes manual.
The Wiper Control Module (WCM - mounted to the air duct above & R of the glove box) is known to go bad, but sometimes it's just the MultiFunction Switch (MFS - the turn signal) which is only ~$20 at most parts stores. It's a little more complicated to replace the MFS than the WCM, but you can find both procedures here or in a Haynes manual.
Senior User
Joined: Sep 2002
Posts: 167
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From: Alberta
Intermittent Wipers
I had the exact same problem on my '92. Only the shortest setting would work on intermittent regularly; sometime the other settings would work if I jiggled the stalk. I ended up taking the MFS apart and cleaning the contacts, and it's been working fine ever since.
You need to first pry the end cap off of the stalk (you can use a knife, or a very small screwdriver). You'll see a phillips screw; remove it, being careful not to lose the springs or pins underneath. The contacts are underneath the second plastic cover. I found mine to be very corroded and dirty. After cleaning the copper contacts with some old carb cleaner I had lying around, I reassembled everything, and it's been working great for the past three months.
Hope this helps...
You need to first pry the end cap off of the stalk (you can use a knife, or a very small screwdriver). You'll see a phillips screw; remove it, being careful not to lose the springs or pins underneath. The contacts are underneath the second plastic cover. I found mine to be very corroded and dirty. After cleaning the copper contacts with some old carb cleaner I had lying around, I reassembled everything, and it's been working great for the past three months.
Hope this helps...
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