R53 Electrical Gremlins?

[Uncraven]

Hi All,

I have a 2003 cooper S with ~50k miles on the clock -- drives like a dream but has a few electrical gremlins. If anyone is able to advise how I can rectify these or indicative costs that would be mega:
I. Left passenger window switch no longer working/window won't lower
Ii. Heater doesn't seem to work - suspect it's the core?
III. Reversing lights don't work, suspect there's a switch that's not getting activated but how do I assert this?
Iv. Rear jet was not working - I hear these can get blocked but no amount of hot water/cleaning has seemed to fix it - I suspect the pump might be knackered but front jets are fine?
V. The warning chime that sounds when you leave the light on and turn off the ignition no longer works

Thanks in advance for any help !

Unc

[Shedding]

Uncraven said:

Hi All,

I. Left passenger window switch no longer working/window won't lower - hit inner door hard with fist just above speaker while holding down window switch
III. Reversing lights don't work, suspect there's a switch that's not getting activated but how do I assert this? - voltmeter at bulb holder