PuffyNuts

I Recently just put in a new alternator and battery into my 1986 chevy g10 van. Ever since i put in the alternator i have been blowing the 2 20amp(yellow) fuses that are in the amp. The Alternator i put in is a high output. Is it the higher output what is blowing my amp or is it the another reason.
I had the same system hooked up before.
What should i do to prevent this? Should i install a capacitator?

PuffyNuts

Wont that potentially wreck my amp

Njord

Are you sure 20Ax2 is its original fuse rating? As long as its not blowing fuses due to a bad load (impedance too low. Damaged voice coils could cause this) then going to 30A or 40A fuses would work. The potential of damaging the amp is higher, yes.
function amp > non-function amp.

You could always turn the gains down. (or the volume)

PuffyNuts

yes 20A is the factory set reccomended...
dont think it has anything to do with a higher output altenator

Njord

If anything the higher output alt would be less likely to blow a fuse.

14.4*40 = 576W
576W/12v = 48A

JohnVroom

yeah it should (not a good recommendation) use the rated fuse size... does the fuse blow right away or does it take a while. The amp or sub could be toast... but lets hope it is something free OK? Since the "only thing that changed" is the alternator lets go there

well you have to verify everything is still hooked up tightly and safely with no frayed wire making a short somewhere. You will need to check incoming power from the alternator to the battery all the way to the amp. You will also need to check your speaker wire to make sure that doesn't have any issues.

Now when I had my high output alt put in it didnt work right, the cars brain didnt make the alternator put out rated voltage... voltage was higher with the engine off. Check your system voltage at the battery and at the amp (should be the same and over 13 volts with the engine running). You may have an alternator issue if the voltage is wrong. I (and others) have gone through this sending the alternator back .... a real pain.

I assume the battery and alt were installed professionally? no chance polarity of the battery was swapped or something silly?

Njord

Johnvroom makes a good point. if the alternator is in fact not putting out the rated voltage, (due to computer brain (as johnvroom said) or bad connection) then what I said is just as valid.

MR2NR

iTrader: (66)

Vehicle runs fine does it? CD player runs fine as well? If the answer is yes to both then you either have a blown amp or you have the power and grounds on the amp reversed. My bet is blown amp.