1990 735i electric problem

[Clyde7series]

I recently bought a 1990 735i it ran great no problems at all the very next morning I go to start my car and nothing the only that lights on the dash is key in the ignition head lights work radio does not I tried jumping it and doesn't work.can anyone please help.

[DennisCooper]

Hi,

It's not possible to fault find your car over an internet forum post - have you checked the battery is good? have you re-charged it and tried again? have you tested for any current drains ? If you've tried to jump start the car and it still doesn't fire up, then is there enough fuel in the car? is the fuel pump working? ....

This section is for car audio and associated electronics. Please post your issue in the relevant E32 7 series section and get a local trusted mechanic to take a look at the car to better determine what's wrong.

Cheers, Dennis!

[eawright301]

I agree with Clyde, but fwiw: jumping a very low battery can be tough, and results can vary depending on how clean the terminals are, how well the fit/bite of the actual jumper cable jaws are (some cables work better than others on certain cars), how dead your battery is, and whether or not the donor car was running.
Try again. Follow the owners manual for jumper cable installation order (it matters, and you need to have the blower on high to deal with any overvoltage [see owners manual, really.). Donor car should be running. Let your car have 10 or 15 minutes of being fed by the running donor car before trying to restart the 735.
A battery that shows decent voltage might not have the amps to back it up. If you can't get it jumped, I'd get a new battery... exactly proper for the car.
Good luck.