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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 11-02-2013, 06:08 PM
broberts broberts is offline
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Location: OKC
 
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Mein Auto: 740il
Question Fuel pump fuse blown

Car would not start. Found fuel pump fuse blown. What would cause this?
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  #2  
Old 11-02-2013, 09:51 PM
Mayorchuck Mayorchuck is offline
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Location: Farley, MO
 
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Mein Auto: '96 740iL
Welcome to the forum. Could be the pump itself, relay above battery, (2nd relay from right) are wiring. Any signs of water in the battery compartment or trunk?

Does it blow each time you put one in? You could isolate it with a meter or unplug the pump and see if it still blows the fuse. If yes, unplug the relay and try another. Even if the new fuse is not blowing, I would still pull the relay to check for corrosion on the pins. i would also pull the rear seat up, remove the cap (passenger side) and do a visual inspection of the fuel tank cap that has the pump/sensor connection on it.
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  #3  
Old 11-04-2013, 01:03 PM
winerack09 winerack09 is offline
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Location: NEW YORK
 
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Mein Auto: 740 LI
I had the same problem... it was a lose wire to the relay
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  #4  
Old 11-04-2013, 06:10 PM
Podmore Podmore is offline
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Mein Auto: 2001 BMW 735i
Blown fuse can be due to a short circuit (broken / exposed wire grounding the current), a poor earth or power connection (leading to high resistance & excessive current draw which exceeds the fuse rating), or a failed / fused fuel pump motor. I'm not sure that a failed relay would cause the fuse to blow as relays will generally fail in the open circuit state. However in these cars, nothing seems to be impossible when it comes to things that stop working properly!
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  #5  
Old 11-08-2013, 06:05 PM
watersnake watersnake is offline
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Location: mudgee
 
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Mein Auto: bmw 730i/l
Air Con fuses in a 730I/L

Could someone please tell me where the relay and fuses for the blower and aircon are in a 730I/L E38

Tar
Ron
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  #6  
Old 11-08-2013, 06:29 PM
Mayorchuck Mayorchuck is offline
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Mein Auto: '96 740iL
Quote:
Originally Posted by watersnake View Post
Could someone please tell me where the relay and fuses for the blower and aircon are in a 730I/L E38

Tar
Ron
Depends on the year. Check the info under the first set of pics here:

http://forums.bimmerforums.com/forum...wer-motor-info
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