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Windshield wiper motor in XLII
Does anyone have any experience in the repair/replacement of an XLII windshield wiper motor?
Mine is having trouble. It doesn’t seem to work in low speed, only medium and fast.
In general, I’m wondering how much of the dash has to come apart to access the beast.
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13 Replies
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Doesn’t sound like that would be the motor if it works on some speeds. I would think that would be more like a switch problem?
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My XLII has an intermittent setting, slow and fast. Are you saying you have the intermittent, slow, medium, and high?
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The problem manifests itself in two ways. First, if I press the knob IN for the windshield washer, the wipers will travel outward to the end, but then will stall and won’t return. To get the wipers to return to home, I have to turn the wiper switch to the I position.
The switch positions are marked 0, J, I, II
0 is off, J is intermittent, I is low speed and II is high speed.
When I’m driving, if I engage the J mode, the wipers will move to the outside edges and stop. I have to kick it up to mode I to get the wipers to return.
The #1 problem is that when I use the windshield washer button, the wipers move once (out) and then stop. They should keep going at least as long as I have the button pushed, and then they should return to the home position. I have to kick the switch into the I or II position to get them to return home. I flip the switch quickly because once they have started the return wipe, they generaly (but not always) make it all the way back. It’s as if the low speed winding in the motor is failing. Hence my curiosity about the motor.
Good questions about the switch, however, thanks for jogging my mind.
-fred
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I had to replace a bearing in the wiper gear case because of water intrusion. I believe you will find that the motor is a permanent magnet type. There are contacts in the case and may need adjustment. CAUTION When you try to index the wiper arms you will need to pull them away from the windshield. Once the leaver is in the motor shaft DO NOT try to run the motor untill the wipers are on windshield. Unless you intend to replace the blades!! If anyone decides to take the motor apart, I can give important advice.
Ed B
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I’d love to see some pictures of that, or even just the motor assembly. Also still curious as to where it’s located and how it’s removed.
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The system in the Prevost coaches is a Bosch system , at least in the earlier XL2s. There is a module that controls the intermittent wipers and it provides a parking signal for the wiper motor when you turn off the switch. It should be located near the wiper motor behind the dash on the right side. It is actiually a small ECU that looks like a tall relay. It is marked Bosch on the outside. This is probably the root of the issues you have described.
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Is the controller module in the same place on the XL? My 93 does not have any intermittent feature any longer. The intermittent setting results in low speed. Low and high seem to be fine.
The washer pump also longer works from the stalk. The pump is fine and i added a panel switch to provide power to the pump. I think it is all controlled by the same module, if I’m reading the schematic right.
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The moduel should be the same and in the same general place by the wiper motor. The washers should be the ring that you pull at the end of the turn signal lever. You supply 24 volts to the wiper pump motor and the control module that causes the wipers to make a certain number of cycles and then shuts off.
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Thank you
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Finally got around to pulling the access panel and found the wiper module. Verified the inputs from the stalk work correctly and have ordered the module.
Will update once I get it installed.
I can not tell from the wiring diagram, is there feedback from the motor to the module? If the new module does not resolve the issue are there any motor adjustments that can be made or is it new motor time?
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The only adjustments that I know of are mechanical. AS far as electrically, it will work or not. The motors were generally robust and did not require frequent changes.
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Thanks Bill.
The module is likely at the house already. You know the drill, drive to Disney remember all the nagging things – like intermittent wipers – that you keep meaning to investigate. Send the family to walt’s house and pull the panel, check a few voltages, order part.
A 15 minute job I should have done 5 years ago and one that I will finish in the barn.
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Replaced the module this evening and all works great.
Thanks for the help.
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