The rear demister button on my heater control lights up for a few seconds then dies.
Any idea where I start looking please?
I'm bloody hopeless with electrics.
On the plus side,,, I have a voltmeter, and I ain't afraid to use it :
If you've got no power to the hrw or either door mirror heater with the relay closed, I'd be checking fuse 'c' on the outside of the BSI and MF5 in the engine fusebox.
If the relay's dropping out on its own, this could indicate a problem with the relay, (which I reckon is R5 in the BSI), or the PCB.
It's meant to drop out after 10 minutes, but as far as I know the timing is another BSI function.
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
Well I checked the relevant fuses and all's OK there.
I can see the relay in between the bank of 6 fuses under the steering wheel column, but don't know how to remove it or check it. Any ideas please guys?
Cheers
Millard