SOLVED: I need a fuse box diagram for a 1990 BMW 735i - Fixya Aug 19, 2014SOURCE: fuse box diagram for a 2004 BMW 325ci. Fuses & RelaysThe fuse box is located under the engine hood on the left side, near the upper strut housing or near the battery. Various relays are also mounted on the fuse box for easy accessibility. Flashers The flashers are located behind the bottom center of the lower instrument trim panel BMW 735i 1990 Heater/Ac Fan was working and now will not May 16, 2010BMW 735i 1990 Heater/Ac Fan was working and now will not come on, happened once recently and have checked all fuses in compartment under hood. Switches light up but blower not coming on at any speed. Are there other fuses (under back seat ? ) to check or relay modules. Thank you.