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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 7 Series / 8 Series > 7 Series - E38 (1995 - 2001)

7 Series - E38 (1995 - 2001)

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  #1  
Old 03-12-2016, 06:52 PM
Kevin Halbleib Kevin Halbleib is offline
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Location: Louisville
 
Join Date: Oct 2011
Posts: 148
Mein Auto: 740il
Wipers not working

I have a 1998 740IL

About 6 months ago the mist feature stopped working.

Lately the wipers have been touch and go. Working sometimes. Coming on and off when they want to. Never work in the middle position.

Now they are not working at all. Wipers stuck in the middle of my windshield in my view.

What I have checked.

All fuese: 3, 28, 55 are good.

I did have about an inch or more of water in the fuse box. I draide the water. Went to a salvage yard and got to of the violet relays. Of course I do not know if those relays are good. I am assuming they are.

NO CHANGE. In my fuse box there is a pink relay ABS, two violet relays and one mint green one. I did not change the mint green one. I am not sure what that one is. I am not sure what to check next or how to check voltage in the right place.

Any suggestions?
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  #2  
Old 03-13-2016, 09:42 AM
Mayorchuck Mayorchuck is offline
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Location: Farley, MO
 
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Posts: 1,240
Mein Auto: '96 740iL
You will want to pull up the wiring harness plug for those relays. There is usually corrosion on the bottom, from the water, that you cannot see from the top.
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  #3  
Old 04-01-2016, 05:39 AM
Kevin Halbleib Kevin Halbleib is offline
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Mein Auto: 740il
I pulled them. They looked very clean.

Wipers when I start the car NEVER work. After the car drives for a while it is a 50/50 chance they will work in the one position only. One speed only. But after a while it will stop. I just don't know if it is the motor and is so how to check and/or change or relays or in the the wiper switch.... Any way to check to narrow down?
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  #4  
Old 04-01-2016, 07:29 AM
zachiepie zachiepie is offline
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Location: St. George, Utah
 
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Mein Auto: 1997 328is, 2001 750is
Is the battery OK?
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  #5  
Old 04-01-2016, 08:04 AM
Kevin Halbleib Kevin Halbleib is offline
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Location: Louisville
 
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Mein Auto: 740il
Battery is rock solid....

Everything else works great.
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  #6  
Old 04-26-2016, 10:10 AM
bagodonuts68 bagodonuts68 is offline
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Location: ND
 
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Posts: 246
Mein Auto: e38 750iL
kevin, did you ever sort this out??
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  #7  
Old 04-27-2016, 08:00 PM
Kevin Halbleib Kevin Halbleib is offline
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Location: Louisville
 
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Mein Auto: 740il
No.... I wish I knew where to start again..

Sometimes I will start them and they work.

Sometimes I start them and theny will not work.

When they do not work. They will eventually will start to work. But will turn off after about 5-10 minutes.

Only will work in the High speed mode. No variable mode.
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  #8  
Old 04-27-2016, 09:50 PM
Mayorchuck Mayorchuck is offline
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Location: Farley, MO
 
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Mein Auto: '96 740iL
High speed only would seem to indicate a failed relay or motor. The two stage motor is regulated by the two relays. Relay 1 is slow/intermittent speeds with relay 2 for high speed. They may be sending the signal and the motor is dying. If it were mine, I would get access to the wiper motor and check for voltage at the motor when it is not working. Could also be the switch or GM but don't see that much.
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  #9  
Old 04-27-2016, 09:55 PM
Kevin Halbleib Kevin Halbleib is offline
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Location: Louisville
 
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Mein Auto: 740il
I have changed the relays off a used BMW. Not sure how to get to the motor and what the voltage checks are. Been trying to find a video or documentation.
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