Ugh...fuse keeps blowing...shocker 240 trouble

Maybe I wired it wrong or something? my neighbor (professional electrican) actually wired it…

At first I used a better wire with a bigger fuse instead of the power wire they gave me. It blew and I replaced it. The second time it blew (and I fixed the pressure switch) I then installed the power wire and fuse that it came with. After one day of installing that the fuse blew and my compressor is out of business again…:mad:

I have no idea what is doing this, but it is getting to me a little bit. Does anyone have any ideas what it might be? I mounted the grounds to a screw, and it seems to be doing the job, but might it be because of the weak grounds?

I will post pics later I believe

i run the fuse block used for car stereos, with a 30 amp fuse… hit up walmart there like 10 bucks … if anything else make suree its groundedgood and not shorting anywhere…

yeah I think that’s what I was using. It went to my old sub. It was a rockford fosgate fuse (expensiveeee). I guess I’ll improve my grounds, put in a fresh fuse, and hope for the best.

is the fuse blowing when u first start ur compressor?? if so then u prolly have bad leader hoses and should replace em…

no it usually runs for a bit and when its filling up the tank the fuse randomly decides to blow. keep in mind I’ve only had it for like two weeks now.:confused:

Just hope you aint got same problem as me…windings on the compressor going, causing it overload.

I believe you may need some kinda anti surge fuse, its not un common that the compressor will draw more amps on start up, especially from cold.

What size fuse is it? 30A?

Poss. bad compressor, not a good ground, not heavy gauge wire, wires chaffing somewhere. Fuses dont randomly blow. You have a problem. If all the wiring checks, then you may need a compressor, or you need a bigger fuse for the compressor. Not sure what you have. I believe a 480c needs a 40 amp fuse.

If you grounded to the body make sure all paint is gone from under the wire end. Bare metal only.

Hmm. I REALLY hope it isn’t the compressor. I mean, I’ve only had it for two weeks. I redid pretty much all of the wiring. I think I need to re-locate the grounds. I am using the fuse that came with the shocker 240 set. It is very close to my battery. I think I’m going to fix my grounds…as that is the only thing I think can be wrong with it. Thanks!

Grounds are a very big issue, and can cause alot of damage if not installed correctly.

How long is your main power wire and what gauge wire is it?

Remember, the 400C compressor pulls 30 amps.
If you use too small a gauge of wire, you will increase amp draw and decrease voltage to the compressor. This can (and eventually will) heat up the wires to the compressor, melt and then destroy the wiring. It can melt down all the way to the compressor’s carbon brushes. If 10 feet or more from power, I’d be using a 4 or 6 Gauge wire for the main power.

Check the integrity of your grounds!!!

i can put money on it that its not the compressors itself… viair compressors are built very well!

I did that last night. I sanded the screw, and the vicinity where it screws in. The grounds are stacked on top of eachother, but my neighbor said that won’t matter. So far no problems, but only time will truly tell…btw right now I’m using the stock 40 fuse.

Oh yeah I don’t think so either…oh god I hope not…that could get expensive lol

ok…well I went out trainhornin last night and i blew three fuses. This is starting to get reallyyyyy annoying. I fixed my grounds, I replaced the two wires going to my horn button and the compressor switch like a week ago. I swapped out the power cord.

Are their any more wires that might be faulty that I should replace?

check your battery voltage. maybe it is too high.

Mate, I’m a sparky by trade (electrician) we should be able to tell now wot type of problem you have by looking at your blown fuse…bare with me…if you look at your fuse, are there small metal balls on the ends of the blown part of the fuse, or has it splattered, carbon & residue and small balls of metal splattered?

If small balls onthe the ends of blown part of fuse - Its an overload!

If splattering of carbon & copper residue or tiny balls - Its a dead Short.

I personally think your compressor is at fault, because the fault is not there all the time! Unless one of your switches is shorting to to ground somewhere. But check the state of your blown fuses.:wink:

Yup. Their are small balls on the end of the fuse. I think I’m going to ask my neighbor (hes also an electrician) to use his volt-o-meter or whatever that thing is lol. I need to get one of my own soon…So what should I do now? Get a new battery?

Thanks so much btw :smiley:

Huh? mate, new battery???..No… sounds like an overload. When a circuit is overloaded, the weakest part of the circuit will have the highest resistance (the fuse) causing it to OVERLOAD…Which is basically the wire in the fuse melting. Hence balls of metal on the fuse ends.

If it was a Short circuit, the fuse basically would have blown apart, hence small tiny balls of splatter & carbonation everywhere in the fuse.

Dude, its gotta be a compressor issue… if it were a Ground problem you would have problems with a warm cable where it is grounded to the bodywork, but would not blow a fuse.

I’m convinced its possibly just overloading when the Comp fires up as they can draw up to 25% more than normal running rating.

Ya know what? I think I’m about to take some pictures of them. So…how do I fix that?