No negative power to the distributor

Hello, what color wire are you referring to? The brown wire? I will put up a wiring diagram for the whole distributor. Almost all of the wires run through the engine computer. The black/orange wire is the power wire from the Ignition switch which also powers the Fuel Injectors, the brown wire is actually a shielded ground, meaning it's a braided wire that covers over wires to shield them from/or producing interference. Are you missing spark?
And im assuming this is the 1.6L engine..there is only a 1.6 and 1.8 listed for that year.

https://www.2carpros.com/articles/how-a-car-electrical-system-works