I keep blowing the 30 amp max fuse. I don't know if it is to the ignition or the fuel pump.

NOT A RV ,right?
fuse # not told nor he AMPs rating. (hard job this)
on all cars, most fuse have not just one, load.
the fuse name is can only fit one name there, even up to 10 loads on 1 fuse. the service manual covers he wiring fully
scan the PCM so it can tell you what is shorted"? DTC errors.
F350 not superduty version (wild guess me)
I have trouble finding the 7.3L wiring in total.
ok found 35 pages of schematics on this. wowl
wish I knew fuse number F# that blew.
fuel heater means what?
Glow Plugs
intake induction heater MIAH
02 oxygen sensor heaters?
fuel filter bowl or water separator? heater?
fuel filter/water separator assembly., yes.
found it. I did, fuse 30/34 and 30 amps,in battery JB.
runs what you said and
waste gate solenoid. bingo shorted
+ 2 relay coils only 86 pins, I bet are not bad. PCM and IDM.
bingo

LEARN THAT FUEL PUMPS CAN SHORT AND DO ALL THE TIME.
WIRES GOOD FUSE BLOWS IS PUMP
THE SCHEMATIC ON THE KUBOTA PROVES THAT
IF SEEN
AND I CAN NOT.
I have an AMP clamp meter
and i clamp to the pump + plus wire
and see overload over 10 amps the pump is bad. or jammed(deep inside)

What make , model , year and engine size ?

There are two fuses for the fuel pump relay. One fuse is load side of relay, that fuse also sends voltage to load side of asd relay, the asd relay sends voltage to several systems, two of which are the fuel injectors and ignition coil. I'm not telling you to replace, anything, but, you need to do some testing.
The other fuse goes to control side of relay, smaller amp fuse. I don't know the amp rating of the fuse that keeps blowing.
See that fuse, it supplies voltage to load side of fuel pump relay and also to asd relay.

Hey Paula, if it keeps blowing that could mean a short in system or more so the pump is having trouble pumping it is 20 years old also check the fuel pump relay

The ASD relay supplies battery voltage (12+ volts) to the fuel injectors and ignition coil(s). With certain emissions packages it also supplies 12-volts to the oxygen sensor heating elements. The Fuel Pump Relay is a separate relay controlled by the ASD relay input to the PCM. Fuse #12 (10amp) provides 12 volts to the coil side of both the relays and the ignition switch. Fuse #6 (30 amps) supplies 12 volts to the output side of the relay. Fuse #16 (15 amp) from the relay output to the Oxygen Sensors and Fuse #26 (15 amp) relay output to the PCM. Fuse #24 (20 amp) is Fuel pump relay output to fuel pump. Fuse #19 (10 amp) supplies 12 volts direct to the PCM.
look for burned or melted wires in the offending circuit.
sounds like you wiggled a wire while installing new relay.

This 30 amp fuse, If it blows when cranking, it is usually the starter dragging, if it blows by just turning the key on it is usually the fuel pump drawing too many amps.
I hope this helps.

have fuel pump checked i have known a bad fuel pump shorting out causing pcm fuse to blow.

It appears that it is part of the fuel pump circuit, so I would concentrate on wiring harness & connector at fuel pump, clean it real good, and apply dielectric grease to the connection, as well as the fuel pump relay, connector & harness.

Hello
Disconnect the fuel pump
then see if you still blow the 30 amp fuse many times when the fuel pump goes bad this will blow the 30 amp pdc fuse
RD