Wiper Motor Slows then stops after 2-3mins

vernoncowley

vernoncowley

Free Member
Joined
Aug 22, 2020
Posts
13
Likes collected
17
Location
Havant
Funster No
74,815
MH
Hymer s680 A Class
Exp
Since 2010
Hi
I've got a Hymer B680 Starline 2012 on a Mercedes Chassis. The wipers will run but after 2-3mins they slow and eventually stop (same on all settings). The motor feels quite hot to the touch but if left for maybe 5 mins they will work again for another 2-3mins. I had a mobile mechanic look at this issue and he took the motor away to see if it could be repaired. Apparently the repair guy found nothing wrong with it and said it runs OK and he ran it for a while without any load. Its back on the van but the problem is the same. I asked if the linkages were seized but the mechanic said they were not. Does this sound like the wiper motor? Would anyone know how to find out what wiper motor part is used on these vans as I looked at Mercedes Sprinter motors for the yeat and they don't look like is at all?

Any help appreciated!

Vernon
 
It sounds very much like a seized linkage,,I had the same problem,,
 
If the linkages move freely it sounds like the motor, off load test not much use. Hymer use to use Volvo wiper motors on the ones with the 3 wiper set up.
 
I'm surprised it's not blowing a fuse if it's stalling the motor out ?
 
To test the linkage I assume if I take the motor off and move the blades from side to side there would be little or no resistantance?
Also if I took the motor into Volvo I assume they would be able to find it?

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Definately no issue with fuses etc its as if it gets so tired it just stops while its recovering
 
A 'no load' test (i.e. free-wheeling on the bench) is a reasonable check but when operating in situ it's working hard to drive the wiper assembly and will heat up. This will show up any faulty internal connection in the wiring or motor windings. It will work again when cooled and the broken connection re-establishes itself.
If the wiper assembly operates freely I reckon a new motor is needed.
I restore many electric motors, magnetos and dynamos in equipment for classic vehicles and always do a 'soak test' on the bench, heating up the unit with a hot air gun which will reveal any of the above.
 
Last edited:
Spriddler said:
A 'no load' test (i.e. on the bench) is a reasonable check but when operating in situ it's working hard to drive the wiper assembly and will heat up. This will show up any faulty internal connection in the wiring or motor windings. If the wiper assembly operates freely I reckon a new motor is needed.
I restore many electric motors, magnetos and dynamos in equipment for classic vehicles and always do a 'soak test' on the bench, heating up the unit which will reveal any of the above.
Click to expand...
Thanks for that I wanted to make sure I'm not going down the wrong route I just need to try and find out what motor is used I couldn't see a model number on it.
 
Spriddler said:
A 'no load' test (i.e. free-wheeling on the bench) is a reasonable check but when operating in situ it's working hard to drive the wiper assembly and will heat up. This will show up any faulty internal connection in the wiring or motor windings. It will work again when cooled and the broken connection re-establishes itself.
If the wiper assembly operates freely I reckon a new motor is needed.
I restore many electric motors, magnetos and dynamos in equipment for classic vehicles and always do a 'soak test' on the bench, heating up the unit with a hot air gun which will reveal any of the above.
Click to expand...

I agree sounds like a motor over heating to me.
 
Agree with all the above, and have also been told that the hymer 3 wiper system has a volvo motor rather than the fiat one. Testing motors, you need to put them under load conditions and stressed to get a true result

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For everyone reference the model is listed BB403868/12-R not sure if that just the motor or the whole unit will try and work out what it is
 

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  • Hymer S680 Wiper Motor.JPG
    Hymer S680 Wiper Motor.JPG
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Our 3 x blade screen wipers and motor on our Hymer were Volvo parts too.

Good luck getting it sorted. (y)

Cheers,

Jock. :)
 
A brief google also found these alternative part numbers

Hymer 414015
AZ45262. John Deere tractor????

You would need to confirm they were identical before purchasing!!!!
 
SandraL said:
A brief google also found these alternative part numbers

Hymer 414015
AZ45262. John Deere tractor????

You would need to confirm they were identical before purchasing!!!!
Click to expand...
 
Your probably right on that link but I couldn't compare with pictures. I've removed the wiper unti and can I confirm they are Valeo 403868 not sure if they are used on any volvos but thats what on a Hymer B680 Starline. Hope that helps someone. I ordered one and will see how I go. Need to check if any of the linkage is stiff though as I will be in the same boat again if they are.

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We had an intermittent problems with the wipers on our 2015 B678. Different symptoms to yours, as the wipers would not switch off after a wash wipe. Took it to the dealers (Becks) and they replaced the Hymer fitted wiper control module and that solved the problem. So may not be the motor at fault.
 
Maybe not on the same track but the wipers on managements Polo got slower until they stopped working at all. The wipers spindles were seized. Our garage managed to strip the linkage and free the spindles.
The spindles were greased when they were put back together. There’s no way to get any oil into the spindles as they are fitted other than spraying with a straw on a WD40 can.
This was a lot cheaper than a new motor.
 
bigwood said:
Maybe not on the same track but the wipers on managements Polo got slower until they stopped working at all. The wipers spindles were seized. Our garage managed to strip the linkage and free the spindles.
The spindles were greased when they were put back together. There’s no way to get any oil into the spindles as they are fitted other than spraying with a straw on a WD40 can.
This was a lot cheaper than a new motor.
Click to expand...
I think we've ruled that out from the OP's first post...........
vernoncowley said:
I asked if the linkages were seized but the mechanic said they were not.
Click to expand...
 
Spanner said:
A quick Google of the number on your old motor throws up an interesting although an old link to a Peugeot Boxer, Fiat Ducato wiper motor
picclick.de

Scheibenwischmotor für Klein-LKW und Wohnmobile • EUR 33,00

SCHEIBENWISCHMOTOR FÜR KLEIN-LKW und Wohnmobile - EUR 33,00. ZU VERKAUFEN! 163227903895
picclick.de picclick.de
Click to expand...
I think it is the most economic way to source these by findiing a car or van that uses them and search for that rather than the original part number the one you listed looks about right the connector is on a wire which is defferent but might work. Identifying it that way is easy dependant on what photos are present on the add buy its worth a go the one I bought was £160!

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The thermo switch is probably doing it's job. Usually connected to the negative side of the circuit. Does this happen under normal conditions in the rain or on a dry windscreen?
 
RobL said:
The thermo switch is probably doing it's job. Usually connected to the negative side of the circuit. Does this happen under normal conditions in the rain or on a dry windscreen?
Click to expand...
sorry old post.
 
RobL said:
The thermo switch is probably doing it's job. Usually connected to the negative side of the circuit. Does this happen under normal conditions in the rain or on a dry windscreen?
Click to expand...
He has sorted it out - see post #21

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Our MH is on a Merc Sprinter and the wipers packed in during in a biblical storm driving down the M42. The breakdown guy couldn't find a problem plus the wipers have been ok since, but with little use. Suspect our wiper motor is Mercedes Benz OEM hence my question, as I reckon it will need replacing.
 
canopus said:
Our MH is on a Merc Sprinter and the wipers packed in during in a biblical storm driving down the M42. The breakdown guy couldn't find a problem plus the wipers have been ok since, but with little use. Suspect our wiper motor is Mercedes Benz OEM hence my question, as I reckon it will need replacing.
Click to expand...
I'm not sure if things like the wiper motor are the same as base vehicle mine is a Sprinter but didn't look anything like sprinter motors that I saw online. I think the MH builder selects these parts however the part number for mine corresponded exactly to model from the manufacturer of the motror, if that makes sense.
 
canopus said:
Our MH is on a Merc Sprinter and the wipers packed in during in a biblical storm driving down the M42. The breakdown guy couldn't find a problem plus the wipers have been ok since, but with little use. Suspect our wiper motor is Mercedes Benz OEM hence my question, as I reckon it will need replacing.
Click to expand...
If you can see a part number on your original wiper motor (possibly Valeo) I would try these people https://www.bowerspartsonline.co.uk/
 
My MLI did the same thing after three years, it was the earth (brown) wire in the multiplug not passing enough current to earth, as the motor is permanently live it depends on the earth wire to park and run at all speeds so I put a REAL earth on it to the chassis and had not more problems .

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