there is not a second fuse box on that application, there are fusable links in the main engine wiring harness that runs along top of the firewall. these are located just to the right of brake booster centerline, fuse links protrude out the back side of harness. There is a acc. feed relay mounted on the right inner fender it is activated by key switch, supplies power to acc., such as heater / AC blower motor curcuits.
7.3 liter diesel
5.9
A 1990 Ford 7.3L diesel engine works by using a very high compression ratio to ignite a mixture of air a diesel. Unlike gasoline engines, it requires no spark to actually ignite the fuel.
According to the AutoZone website : For a 1990 Ford F-350 , 7.3 liter Diesel V8 engine : With engine oil filter change : ( 9.8 U.S. quarts )
at the engine compartment fuse box
if the engine is stock it has 160 horsepower
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Cavalier 1985-93 Top of Glove Compartment
on the top of the engine compartment firewall
In the fuse / relay box in the rear of the engine compartment
The power steering pump is in the engine compartment,to the right side,towards the rear of the engine
underneath the engine compartment fuse box on passenger side