20 Most Recent 1993 BMW 7 Series Questions & Answers

If you're comfy with manuals then i know few websites that can help you with it. Bcause I've got it from various websites so I know how each site deals. try www.reliable-store com . Very helpful

Check fuel pump pressure

Check your owners manual.If it has a filter, it should be behind the glove box. Some models do not have a filter.

whats the matter with it?

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Car Radio Constant 12V+ Wire: Red/White
Car Radio Switched 12V+ Wire: Purple/White
Car Radio Ground Wire: Brown
Car Radio Antenna Trigger: White
Left Front Speaker Wire (+): Yellow/Red
Left Front Speaker Wire (-): Brown/Orange
Right Front Speaker Wire (+): Black/Red
Right Front Speaker Wire (-): Brown/Orange
Left Rear Speaker Wire (+): Yellow/Black
Left Rear Speaker Wire (-): Black/Orange
Right Rear Speaker Wire (+): Blue/Black
Right Rear Speaker Wire (-): Brown/Orange

I would start by cleaning battery cables top and ESPECIALLY bottoms. I know a pain, but the lower ends are exposed to road grime & grease. Also have your battery "load tested". Between all the electrics and the required voltage to run ignition, they can be a pretty big load on battery. (I have 93 M5 and it has same issues when I store it over the winter months)

Make sure you have the right amount of coolant in the vehicle. Make sure your fans are running correctly. If they are not running, check the fuse. If all this checks out, it may be a bad thermostat.

1994 BMW 740i there is no iar coming out of vent when I turn it on.

try lucas transmission additive.

heater core is on the fire wall on drivers side of car behind dash.

That means either the front or rear brake pads need to be changed and the light needs to be re-set