30 amp fuse Problem
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New User
Joined: Jan 2007
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30 amp fuse Problem
I have a 2000 f-250 diesel and the truck keeps blowing the number 30 fuse which is a 30 amp under the dash . It controls the PCM relay coil, wastegate solenoid, injector driver module relay coil. I checked for bad wires and connections and found nothing. The truck cranks over but does not start when fuse is blown replaced it with new and worked fine for about one week and blew out today tried 5 fuses and finally the sixth one worked. Does any body have any solutions thanks. By the way truck runs fine for now.
Senior User
Joined: Jun 2005
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Try unplugging the fuel heater. The plug at the bottom rear of the fuel filter cannister. Bad heater element is the most common cause for this fuse to blow. You can run without the heater or not real difficult to replace.
Logistics Pro
Joined: Mar 2004
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Betthebux nailed it. The fuel heater in the bottom of the fuel bowl (under the fuel filter, in that housing) can short, and blow that fuse... quick giveaway is you won't get a WTS light when you turn the key to Run. As long as that fuse is blown, the truck will just crank and crank but never start, as the PCM isn't getting any power, and hence your injectors are dead.
Unplug the fuel heater or repair it, or it'll keep blowing fuses.
Unplug the fuel heater or repair it, or it'll keep blowing fuses.
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New User
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thanks
Thank you guys for replying so soon. sorry for not reposting sooner. You guys nailed it I waited for it to happen and it finally did so I climbed up and unplugged the fuel heater and that was it. Its been trouble free so far I appreciate all your help.
