1990 Dodge D350 Wiring - Instrument Panel - Mopar Parts MoparPartsGiant offers the lowest prices for genuine 1990 Dodge D350 partss like Wiring - Instrument Panel are shipped directly from authorized Mopar dealers and backed by Wiring diagram 1990 dodge diesel D350 - Fixya Jan 12, 2014Wiring diagram 1990 dodge diesel D350 - Dodge Cars & Trucks. Posted by Anonymous on Jan 12, 2014. Want Answer 0. If you are looking for the fuse box diagrams or any other diagrams for your Ram, check promanuals for a factory service manual for around 20 bucks or so. It's an invaluable tool for my Ram 2500.