i keep blowing fuses

[dave g]

my 69 f100 has blown 2 fuses in the last two days first was turn signal and the next day brake lights. i dont know much about this truck i have only had it a couple of weeks and now this. but what i can say is it has an aftermarket radio that didnt work it had a blown fuse that a also replaced. so im wondering if it could be the radio. so any hep would be appreciated greatly

[fordman]

when does the fuse blow? does it blow only when you step on the brake? if the radio doesnt work disconnet it from the power.

[Thunderfoot]

I'm guessing that you have a problem with one of the rear turn/brake lights. Either one of them has an element that is shorting out or there is a wire back there shorting out somewhere (maybe some trailer wiring hacked in)
These rear turn/brake lights would be the one thing that could blow either one of those fuses depending on if you are using the turn signal or on the brakes... Which also leads me to the Turn Signal Switch (TSS) as both of these wires go through it as well...

[basketcase0302]

Dave,

radio that didnt work it had a blown fuse that a also replaced. so im wondering if it could be the radio.

Make sure the radio is not on the same fuse as the turn signals, (usually not enough power consumption from a radio to blow the turn signal fuse).
Nothing else should be added to the turn or brake fuse circuit.

Basketcase