BMW 325

1986 BMW 325 Electrical / Lighting Systems Malfunction When troubleshooting Always

MY CAR HAD A MIX FUSES SO SOME EQUIPMENT DIN'T WORK (WINDOWS OR HORN ) THE i CHANGE THE FUSES ACORDING TO THE BOOK IT WILL AND EVERYTHING WILL WORK BUT AFTER 30 MINUTES IT WILL DIE. NOW I CAN GET IT TO STAR. THE LIGHTS WORK BUT THAT IS IT I CAN GET IT TO TURN THANKS iTZJAK

YOu will need to determine why the engine is stalling. Check for spark to the plugs during the no start period. If you are missing spark the problem is in the ignition system. Your book shoud cover troubleshooting this.
If you have spark check fuel pressure.

sparks plug are ok it is electrical it seems that the all car is dead with exption of the lights I move some relays around last time and that seems to help, when it dies the windows and fun go out
where is a good place to purchase relays?
I change all fuses exept the relays the dealer here wants to much for them,
what are the two boxes that are one under the steering wheel and the other is under the glove box?