Electric windows fuse keeps blowing

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Quaser
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Post Mon May 01, 2006 12:55 am

Hi

I got a car where the electric windows fuse keeps blowing.

At first, i thought it was if i left me finger on the button too long - but earlier today - it happened whilst the window was going back up!

This happens to both fuses (engine on/engine off)

Any ideas how to cure this?

Q
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Brianmoooore
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Post Mon May 01, 2006 10:20 am

Driver's door, passenger door, rear doors? What model? Bit more info required.
Quaser
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Post Mon May 01, 2006 11:42 pm

any door - cab (yes - its back at last!!)
BMW E30 2.0 Convertible (M52B28)
BMW E30 2.0 2 Door (M20B28 Turbo project to start)
BMW E36 328i Sport (M52B28 Turbo Project)
http://www.e30zone.net/modules.php?name ... ic&t=68663
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Brianmoooore
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Post Mon May 01, 2006 11:50 pm

Any door? You sure? Or have you got wrong size fuses fitted? 17 and 28 should both be 30A.
Quaser
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Post Tue May 02, 2006 12:00 am

both are 30 amp - at first i thought it might be a relay not cutting out when it gets to the top or bottom - but it also happened once when i was pulling all windows down at once!

Is there any relay involved?

Q
BMW E30 2.0 Convertible (M52B28)
BMW E30 2.0 2 Door (M20B28 Turbo project to start)
BMW E36 328i Sport (M52B28 Turbo Project)
http://www.e30zone.net/modules.php?name ... ic&t=68663
Martinaston
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Post Tue May 02, 2006 12:25 am

Mine kept blowing because i had a paper clip fall down below the ash tray and it shorted the cigaret lighter :mad:
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Brianmoooore
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Post Tue May 02, 2006 12:46 am

Quaser wrote:both are 30 amp - at first i thought it might be a relay not cutting out when it gets to the top or bottom - but it also happened once when i was pulling all windows down at once!

Is there any relay involved?

Q
No relay involved - the motors just stall when the limits are reached. If the button is still held down, the cutout should trip.
If the fuses are correct, there is no single fault that would blow the fuse when any window is operated.
Only suggestion I can think of, is that all the window mechs are dry, and the motors are working too hard. Lubricate the window channels with silicon grease spray.
The fuse is entitled to blow if you operate all the windows together.
Quaser
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Post Tue May 02, 2006 12:57 am

in that case - how feasible would it be to put a fuse in line with each switch and just wire up the main fuse point?

what colour lead would i need?
BMW E30 2.0 Convertible (M52B28)
BMW E30 2.0 2 Door (M20B28 Turbo project to start)
BMW E36 328i Sport (M52B28 Turbo Project)
http://www.e30zone.net/modules.php?name ... ic&t=68663
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Brianmoooore
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Post Tue May 02, 2006 8:55 am

Quaser wrote:in that case - how feasible would it be to put a fuse in line with each switch and just wire up the main fuse point?

what colour lead would i need?
Would be possible if you fed each switch from a sererate fuse at the main power terminal, and then fitted a seperate earth wire from each switch, otherwise you would risk overloading the supply and earth return wires.
A lot easier to sort the fault.
Demlotcrew
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Post Tue May 02, 2006 9:02 am

Have you got any total enclosure modules fitted?

Has anyone tapped into the window power feed for any other 'Accessory' in the car?

Andrew