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E36 (1991 - 1999)
The E36 chassis 3-Series BMW was a huge hit among driving enthusiasts from the first moment the car hit the pavement. The E36 won numerous awards over the years it was produced and is still a favorite of many BMW enthusiasts to this day! -- View the E36 Wiki

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  #1  
Old 09-27-2007, 08:31 AM
adpinc adpinc is offline
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Location: New Jersey
 
Join Date: Jul 2005
Posts: 26
Mein Auto: 325iC
Convertible top keeps blowing fuse

I have a problem that just started. I own a 1995 325iC with the semi-auto top. Every time I lower the top, I can't raise it back up because fuse #35 is blown. I've witnessed the problem 3 times now. It's a 25A fuse.

The first time it happened, I had to manually raise the top. Once I discovered the blown fuse, I then had to figure out how to reset the motors. So if anyone needs to know how to do that, I'm your man!!!

The top opens fine, but won't go back up. When I check the fuse - yup - blown!

I'm guessing it has to do with some sort of limit sensor failing, and the motors sieze up causing a current overload.

Has any one else ever had this problem? Anyone know how to diagnose it?

Help!!!
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  #2  
Old 09-27-2007, 09:08 AM
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1canary 1canary is offline
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Location: Doncaster, England
 
Join Date: May 2007
Posts: 266
Mein Auto: 1998 323i convertible
Any wires trapped in the wiring harnesses to the top when it opens or closes, maybe a short circuit being created?
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  #3  
Old 09-30-2007, 03:37 PM
adpinc adpinc is offline
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Location: New Jersey
 
Join Date: Jul 2005
Posts: 26
Mein Auto: 325iC
Switch S6 blows fuse

I did some troubleshooting, and found that switch S6, which opened, blows fuse 35, a 25A fuse.

This switch is located on the passenger side, inside the convertible top recess. When the top comes down, the latch catches and opens this switch. As soon as the switch is opened - POP. The fuse blows.

The purpose of this switch is simply a trunk lock out that prevents the trunk from being opened. If the top is up, the switch is closed, and the trunk cannot be opened.

I found a connector behind the fabric liner of the trunk for this switch. I disconnected it, and found that the connector has a burn mark. Maybe the connector has a short. Seems really odd, though.

The strange thing is that this wire is very small gauge - definitely too small to support 25A, yet its the 25A fuse that blows.

I don't get it.

I've bypassed the problem for the moment by simply keeping the connector disconnected. But it bugs me that this problem exists at all. It just started happened last week.
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  #4  
Old 10-01-2007, 08:30 AM
Bimmer_Angel's Avatar
Bimmer_Angel Bimmer_Angel is offline
Vert Owners Do It Topless
Location: Devon, UK
 
Join Date: Jan 2007
Posts: 1,207
Mein Auto: 1995 320i Convertible
Quote:
Originally Posted by adpinc View Post
I have a problem that just started. I own a 1995 325iC with the semi-auto top. Every time I lower the top, I can't raise it back up because fuse #35 is blown. I've witnessed the problem 3 times now. It's a 25A fuse.

The first time it happened, I had to manually raise the top. Once I discovered the blown fuse, I then had to figure out how to reset the motors. So if anyone needs to know how to do that, I'm your man!!!

The top opens fine, but won't go back up. When I check the fuse - yup - blown!

I'm guessing it has to do with some sort of limit sensor failing, and the motors sieze up causing a current overload.

Has any one else ever had this problem? Anyone know how to diagnose it?

Help!!!
I am sure you will now be inundated with requests for this information. This subject has caused so many headaches

Hope you get your problems sorted soon. Totally wont happen here in the UK at the moment because it is now raining and probably wont stop until next May
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E36 320i Convertible - Superchipped - K&N Apollo CAI - Green Stuff Pads - NGK Iridium IX plugs - Pioneer MP3 Headunit - JL Audio Kick Panel Speaker Pods - Wind Deflector - M3 Style Spoiler. 18" Bridgestone 225/40/R18. M Sport type Alloys as fitted on new E90. Alloy Billet Strut Brace, M3 type front bumper, M3 type rear Diffuser. Royal Purple. Hard Top.
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  #5  
Old 07-17-2016, 06:04 AM
daver328i daver328i is offline
Registered User
Location: Nova Scotia, Canada
 
Join Date: Jul 2016
Posts: 5
Mein Auto: 1998 328i convertible
top fuse blowing

I have seen several posts regarding the wiring harness going to the trunk lid. Opening the trunk eventually rubs the wires bare. Where the trouble may lie with the locking of the trunk to open, maybe this could be the issue. Try searching trunk wiring faults for more info.
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  #6  
Old 07-17-2016, 09:39 AM
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Ryan... Ryan... is offline
Please, call me Brian.
Location: Madison WI
 
Join Date: Dec 2008
Posts: 10,718
Mein Auto: 95 325ic
I think once mine finally starts giving me issues I'm going to convert the thing to full manual mode and ditch the motors. Weight savings and racecar style..
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