Just got an electrical problem and wondered if anybody had hints about
where to look.
It's a 1984 318i. The radio (a recent one from the previous owner),
clock, glove compartment light (there is one, right?) and dome light
on the driver's door are out.
So I checked the fuse and it was blown. Tried a new one and it blew
immediately as it went in. So I'm not sure about where to start on
Some other info that should be unrelated. I had taken off the fuse
cover a few days earlier and the catch on the cover snapped, so I had
driven briefly without the cover, but it all looks clean and dry.
Next, the trunk had been left up overnight just before this situation
Speedometer has been intermittent for some time.
If you don't have a manual, start at the library and trace the circuit
for those devices.
I'd start with the radio as it's been owner added and probably the
most recent change in the electrical system. Look for a "black tape
fallen off and skinned wires touching the frame" problem.
Thou shalt not replace the fuse with a higher value.
The snap is off my fusebox cover too. It sits on there fine without
Probably unrelated. Bad luck runs in multiples though, right? My trunk
('88 325) has a light in it, which I guess could heat the circuit if
it was on all night.
Does it come on if you flick the dial with your finger? (my temp gauge
is like that). If so check the connectors on the back of the dash.
Also, some models have a battery in the back of the dashboard that
needs replacement every four years or so. I don't know if the speedo
is part of that setup though.
Good luck and happy motoring.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.