I am in the process of trying to Fix my 1990 740 wagon.
This car died on me in town. I have towed it to my home and am trying
to find out why it has no power inside the car.
I have charged the bat , cleaned the cables , checked for power at the
alt and starter. The starter will crank if I jump the solenoid and the
alt has power.
Their is no power at all on any of the connections inside the car.
No dome light , No dash lights , no change with the key on or off. The
4 way flashers don't even work.
The fuse panel is completely without power. I can find no trace of
power inside. It is like the cab has been unplugged.
The day it died I started the car and it ran fine. I turned the heater
on then the lights . At this point all went dead. It was like the
lights pulled to much power and something clicked off and took all
power with it.
After a short time the dash came back to life and the car once again
started and ran fine.
Upon turning on the lights still fine then when I turned the heater on
high again it all died.
again after a short time it all came back so this time I left the
heater on low and the lights on parking lamps and all was fine.
I went to town made several stops and turned the car off as many times
.
It always started again with no indication of trouble.
Starter sounded strong , car ran fine .
I stopped at a stop sign and this is where the car went dark , all
power inside went out and stayed out.
I have been searching for the source of this power outage for 3 days
now with no luck.
I can not understand why a loss of power that disables a car would also
take the 4 way flashers out, as a disabled car really needs the
flashers at that time.
I am willing to look at all suggestions at this point . Please help.
Thanks.