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No power in the wiper motor

Tiny
DARRYLROCKS
  • MEMBER
  • 1996 BMW 733I
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 2,000 MILES
The spray comes on but the wiper does not. Check the motor and it is working but there is no electrical supply to the motor. Any diagrams will be helpful.
Friday, February 16th, 2018 AT 3:44 PM

5 Replies

Tiny
STEVE W.
  • MECHANIC
  • 13,445 POSTS
Could you please verify the year, model and engine and maybe country of origin. I do not show a 733I after 1984 and as far as I can find the 7 series never used anything smaller than a straight 6. Would hate to give you the wrong diagrams and have you fry a controller.
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Friday, February 16th, 2018 AT 11:37 PM
Tiny
DARRYLROCKS
  • MEMBER
  • 3 POSTS
Sorry, it is a 730i e38. The year is 1996 and the country of origin is Germany.
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Saturday, February 17th, 2018 AT 11:44 AM
Tiny
STEVE W.
  • MECHANIC
  • 13,445 POSTS
Okay, these are the diagrams BMW shows for that system. It appears that you should have battery power on the brown/green wire at the wiper motor with the switch on. That is fed through from the general module, which also powers the washers.

You should also have battery power through the wiper relay from fuse F3 a 30 amp.
I would start at the fuse and the relay.
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Sunday, February 18th, 2018 AT 12:08 PM
Tiny
DARRYLROCKS
  • MEMBER
  • 3 POSTS
Thanks for the help.
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Sunday, February 18th, 2018 AT 2:04 PM
Tiny
STEVE W.
  • MECHANIC
  • 13,445 POSTS
Not sure it was much help. BMW has some of the most confusing service information. However, the way that system works testing for voltages on the wiring should point to where the problem is.
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Monday, February 19th, 2018 AT 7:22 AM

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