i havea 97 f150 with a 4.6 4x4 lately i have been blowin my underhood mini fuse (15 amps) for my taillights, dashlights, and running lights. i still have headlights, turn signals, and brake lights, but nothin else and it is really weird driving with a blacked out dash. I put in a new fuse and it was fine for about a week, then started the truck up in town today nd it went out again, then drove to the gas station and boughtgg new fuses....put in another and poof. Drove home.. put in new fuse...poof not even a flicker before it blew.....put in a 20 amp fuse and same thing.. no life at all. What's going on on???????

 

State the fuse number for assistance.

 

before you can put in a new fuse you have to know why the fuse blew and what caused it, and that can be a number of things
-you can have a short somewhere
-water is getting to the fuse of to the wires
and these are a just a few items that can be it
I would start by checking connections on tail lights-maybe the taillight is bad and leaking water
either way something is causing the fuse to blow and you need to fix it, if it keeps blowing fuses and you keep feeding it something is gonna burn up or get damaged. If you are not electircal friendly this may be the time to breakdown and visit the dealer

 

ok got a schematic disconnected tallights...pop....disconnected corner lights....pop.....cut off trailer lights.....pop......now its down to either bad headlight switch....the license plate lamps....or a short between the switch and fuse box.

 

found the prob today....a wire for my visor lights broke n was shorting out the circuit. YAY heap fix.