North American Turbocoupe Organization



wiper motor help
boboli Offline
Member
#1
My wiper motor recently stopped going to the park position when I would turn them off. It would go down to the lowest wipe position and then it would sit there, making a horrible popping sound. I had to pull over and unplug the motor to get this violent motion/sound to stop. I have had to drive the car a couple times in the rain. I would just plug the motor back in and leave the wipers on the high or low setting. When I am done with them, I would have to get out and unplug the motor.The wipers would stay above the hood line and i would have to push them down a bit to get them as low as possible. There was some resistance, so I didn't force it too much. I figured it was the linkage attached to the motor causing this.
Today, it rained on me unexpectedly. I pulled over and plugged the motor in but the wipers wouldn't work at all. If I moved the switch between positions, it would make the arms twitch, but never a full sweep. I noticed that I could grab the arms and manually move them through an entire sweep of the windshield. Before, you could not do this.
Any ideas on what to look at? I am pretty sure the problems in the motor/arm assembly. Besides buying a $50 rebuilt motor, what else can go wrong with the wipers. Are there bushings that wear out with age and need replacing?
thanks in advance
1988 turbo tbird, 5spd, 140k, all stock except boost control valve.
1986 dodge omni glh turbo, 111k, my money pit.
1989 mustang Lx 5.0 convertible, tropical yellow/ tan interior, 1of only 144 made, 164k, aod, all stock including overheating TFI!
89 Jaguar XJS convertible, LT1 conversion, now fighting the prince of darkness (aka Lucas electronics)
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boboli Offline
Member
#2
I took the motor apart and found a piece had come loose and fallen into the switch area. There is also a piece that slides back and forth as the motor goes around. The sliding piece was retained by a metal rail. This was very bent so I used a hammer to pound it back into shape.
After a few glitches, the motor works again. Unfortunately, I put something back together wrong. When the motor goes to park, it raises the arms. Hopefully it's just the arm on in reverse.
The motor was fairly easy to service. Glad I didn't spend $50 on a replacement before seeing if I could fix the original
1988 turbo tbird, 5spd, 140k, all stock except boost control valve.
1986 dodge omni glh turbo, 111k, my money pit.
1989 mustang Lx 5.0 convertible, tropical yellow/ tan interior, 1of only 144 made, 164k, aod, all stock including overheating TFI!
89 Jaguar XJS convertible, LT1 conversion, now fighting the prince of darkness (aka Lucas electronics)
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TheUglyDuckling Offline
Junior Member
#3
I actually have this same exact problem in mine, just have yet to address it since it's off the road for the winter. Good stuff though, I'll definitely try to fix this issue next time I get the chance knowing your success.
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Dan S Offline
Administrator
#4
While you're in there doing fixes, take a minute to lube all the joints on the linkage arms to both wipers. More than likely the damage was caused by lack of lubrication. A few years back, mine would not park. There were many ideas, but the lube did the trick and they are still working fine.
Dan S
Custom 88 TC, Mandarin Copper Pearl Metallic
http://natomessageboard.com/ubbthreads.p...5#comments
1972 Ford F-100 SWB Styleside
2015 Lincoln MKC 2.3 EcoBoost AWD
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Pete D Offline
Administrator
#5
I have heard, over the years, a few reasons why the wipers won't park. There is a "black box" behind the dash that can be the cause. There can be problems with the connectors at the motor, (take the connection apart and back together a few times and see it that helps. These are in addition to damage in the motor/transmission area like boboli found.

I agree with Dan, lube the wiper actuation mechanisims
Pete Dunham


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boboli Offline
Member
#6
I did remove the linkage/arms and lubed them. If I had the time, I would have figured a way to completely disassemble them. It looks like there are bushings that have seen better days connecting the pieces. This allows flexing and probably some binding.
I figured out the problem. I had reassembled the sliding part of the motor in reverse. That is why the motor would park the blades by pushing them up. Swapped that piece to the other side, and it works great!
So my problem was the piece that had fallen off in the switch part of the assembly and the rail that the sliding part of the motor moves along was bent pretty badly. Hopefully the motor will be good for a long time. Now to buy a spare linkage and see how I can replace the bushings
1988 turbo tbird, 5spd, 140k, all stock except boost control valve.
1986 dodge omni glh turbo, 111k, my money pit.
1989 mustang Lx 5.0 convertible, tropical yellow/ tan interior, 1of only 144 made, 164k, aod, all stock including overheating TFI!
89 Jaguar XJS convertible, LT1 conversion, now fighting the prince of darkness (aka Lucas electronics)
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