ok this just started doing this outta the blue..... everytime i put in a new 15A fuse in for the brake lights/horn it blows as soon as it touches the plug. so i have no brake lights or horn. ive tried a 30a fuse and it blew right away... any ideas on what i should do? is there a way to trace the wires or anything? I'd prefer to do it myself since taking it somewhere to get fixed will cost alot of $$ which i dont have. thanks in advance

Ps. it blows when the horn/brake lights are disconnected and car is off

 

Have you tried any other size fuse, bigger than the 30...Like a 50?

 

id prefer not to use a bigger size amp fuse considering the 30A blew right away and its not good

 

I would say an open wire somewhere that is hot. I fnn hate electrical gremlins, good luck man. Do you have a shop manual to look at the wiring diagrahms?

 

nah cant find one... only ones i can find are for 78-82?

 

Hey. At the fuse panel - you know how the fuse has two prongs right?.....check the voltage of those two slots.....one should be 12v or 11.95+.....and the other should be ZERO.....most likely, the one that's supposed to have ZERO has like .2v or something like that. All that means is that you have a bad ground somewhere......you can try to find that ground - check for an open circuit......or you could try to cheat by cutting that wire(responsible for that slot) and put in a few resistors.....solder them there. I think the fuse is popping because that "ground" is getting too much current. The voltage pressure is outa wack....just a thought....hope it helps.

 

ALso NEVER go higher than the above stated amps on the fuses.....

Reason why: the circuit can only take in so much current(measured in Amps).....so the fuses' responsibility is to open the circuit when a higher current passes......

so, if you have a 50A fuse there....when its supposed to be 15A.....35A are getting through that circuit - so you're still going to fry the load source(lights, horn) anyway. The resistors job is to hold back a certain amount of current - there are different resistors.

Also, if you put in a higher AMP fuse - you can definately start a fire.....you don't want that....because then, you'll have "SHORTS" everywhere....won't be pretty.

Check your grounds....find out where it is.

 

check the bulbs in your tail lights, unplug them all then put the fuse in , put them in one by one and check the fuse each time, that will narrow it down