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E89 blowing 20 amp hardtop control fuse

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Montymillar
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E89 blowing 20 amp hardtop control fuse

Post by Montymillar » Wed Jun 21, 2017 11:23 am

Has anyone had experience of the main roof operation 20amp fuse blowing? My Z e89 has been with the dealer for 3 weeks, warranty thank god , but they can't find the cause. They have replaced the hydraulic motor unit, hardtop controller, 2 roof relays and 2 boot micro switches.
I have collected the repaired car twice in that three weeks only to drive it straight back with the same fuse blown. Leaves you without roof or boot operation.
Thankfully not happened in the rain yet.
Missing the best of summer weather in Z4.
E89 sDrive30i Highline M Sport Auto in deep sea blue, cream leather.

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Nictrix
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E89 blowing 20 amp hardtop control fuse

Post by Nictrix » Wed Jun 21, 2017 12:32 pm

Sounds like it will be a wiring fault rather than a sensor or relay
E89 2014 35i M Sport Black with Black leather :)

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E89 blowing 20 amp hardtop control fuse

Post by Maniac » Wed Jun 21, 2017 5:24 pm

Nictrix wrote: Wed Jun 21, 2017 12:32 pm Sounds like it will be a wiring fault rather than a sensor or relay

Ditto. I'm going to say it's a short.

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Montymillar
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E89 blowing 20 amp hardtop control fuse

Post by Montymillar » Thu Jun 22, 2017 12:08 pm

As most heavy current components have been replaced the "short" is all thats really left.
Just thought maybe there is a known pinch point somewhere that someone has seen happen before.
There is no prescribed timescale under warranty that a dealer can have to repair a fault.
Obtained from the Motor Ombudsmen this morning. So frustrating.
E89 sDrive30i Highline M Sport Auto in deep sea blue, cream leather.

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