Where is the heater blower fuse on an E39?

[_deano]

I think that the blower is still running after the car has been turned off (i can hear the fan spinning) and it's running the battery down. I tried to start the car just now and the battery is dead (again), even though it's been used today.
So i think that i am looking for fuse number 67 and i can't find it in the glove box and it's not in the rear by the battery. Is there another fuse bay where this fuse is located?
thanks
DJ

[Egbert Nobacon]

From memory isn't there another batch of relays under the bonnet, nearside right up by the windscreen ?

Bit dark to go and look now - i'll check in the morning.

[rassi]

Think this could be related to a faulty final stage resistor, which tend to go bad on the E39. Instructions for replacing it (albeit on a LHD car) here: www.540i6.com/finalstagereplacement.html

[Fixedwheelnut]

The heater fan power comes via the 'resistor pack' also known as a 'hedgehog'.
Generally it is this that fails and causes erratic fan speed and/or the fan running on with the engine off.

It is mounted on the right hand side of the heater box under the dash by the bulkhead.

[_deano]

interesting. Any ideas on how much these little units are?

[blackspider]

Not another resistor pack...I havent done one for hours!!!

Drivers footwell-drop the side carpet panel down(heater side)and it is pushed into the side of the heater box-has a 5 pin connector on it.The pack is clipped in place,just pust the tabs apart and it slides out.

Edited by blackspider on Monday 29th January 08:22

[_deano]

blackspider said:

Not another resistor pack...I havent done one for hours!!!

Edited by _deano on Monday 29th January 00:09

[eliot]

_deano said:

blackspider said:

Not another resistor pack...I havent done one for hours!!!

Edited by _deano on Monday 29th January 00:09

I think he's refering to the fact that its a common fault.
Take a look inside the glovebox - there's a drop down panel with fuses in it.

[blackspider]

fuse 76 should be the fuse your after and its behind the glove box with 75 and a bank of relays(next to general module).its a 40 amp fuse

[_deano]

£70 for that hedgehog, changed it over in about 20mins with 2 cut fingers and jobs a good-un. the fan no longer spins up when the car is off, so i'm hoping that this has done the job. I will taking the car out tomorrow for a long drive to charge up the battery.