75 amp fuse keeps blowing

[DR F33LG0OD]

my 75 amp alt fuse keeps blowing when i connect the battery, my grounds are good and as far as i can see the harness is ok. what is this i dont even

[Wc240]

check the harness again really well. the connections on the alt also. somewhere a hot wire is goin to ground

[Klits562]

Its the fuse for your alternator if its blown your battery wont charge

[DR F33LG0OD]

still cant find a problem

[nissan24009]

if you changed your alternator recently, you may have put the wires on backwards, thats why its grounding out! thats what happened to me before.

[DR F33LG0OD]

if you changed your alternator recently, you may have put the wires on backwards, thats why its grounding out! thats what happened to me before.

you mean mixing up the two wires that you torque onto the alternator?

[sx moneypit]

Sometimes people will bolt the battery + wire to where the ground wire is supposed to go .

[DR F33LG0OD]

yea i thought about that but they dont really fit right the other way

[sx moneypit]

Have you checked the battery + terminal on the alternator? I have seen where the nut loosens up and the wire arcs and melts the plastic insulator.

[DR F33LG0OD]

yea, everything is tight and nothing is melted

[sx moneypit]

You might want to remove the B+ wire from the alternator and see what happens.I can't remember seeing an alternator short out but it is possible.

[nissan24009]

yep thats correct..