WHATS WRONG WITH MY 240 CHARGING SYSTEM

[MYFREE95,240SX]

good battery good alternator still not charging running off battery all connections good from what i can tell. fuse good. car running gets 12 volts at terminals steadily dropping. car off, 12.34. acting as if alternator is not working but did the same exact thing before i replaced it with a brand new one like a month ago ran fine for 4 weeks then happened again any suggestions? its a 95' ka24de lil oil on new alt but just a little.

[Airmanspecial]

do you have a service manual?(i.e CHiltons) it will save money in the long run...and give knowledge you can rely on......

[liquid_cool]

ive been waiting for you to post more info but ya havent...so here is a few stabs in the dark...since the battery and altinator are good there are really only a few places to look.....#1) look at your battery cables and the cables that go from the positive to the altinator/starter..you need to look and see if there is corotion..like white powder ..thats oxidation and probly an issue....#2)..fuse's...do a run down throu your fuse block and double check to see that you dont have a blow fuse..#3) last but not least..you might have to ohm out each wire coming from your altinator to the battery..you may have a break in the system somewhere...

all this info is for is a refrence for you to start probing around with..this will at least get ya looking in the rite direction..i wish ya luck and keep us posted.

[Vegascorbin]

do what Liquid Cool said. Also remember that the altinator requires either a light or a charge meter inline as shown in the FSM. Without it a perfectly good altinator will not charge. Get an FSM and trace the wireing paying particular attention to the grounds and fuses.

Late thought. your belt is tight right? Sounds silly but dosen't hurt to double check.

[MYFREE95,240SX]

ok so replaced alternator again put 115 amps in this time maybe system is pulling 2 much was a suggestion re-wired stereo. when i was putting the alternator in i realized that the wires coming out of the wiring harness that plugs into the alternator were both cracked meaning the coating for the wires so i just taped them up nice car seems to be fine now but it did last time as well. after i put the alternator in i degreased my engine and cleaned it up a lil when i started the car my battery light was on and my brake light why would that be?i removed the ground for like 15 mins put it back started the car and they were still there turn off start again and gone. later i started it and they came back but then went away like two min into my journey wtf?

[USMCgetsome]

if your wires jackets were damaged you need to take off that tape and put on some heat shrink. Also, i'd look for more damage with those wires. I bet they are grounded out to each other somewhere down the way.

[DryskalM3S13]

the corrosion they mentioned can easily wear off at the connector end because of the continuous movement they see. ie: bumps, wind, rain, but the corrosion travels up copper wiring like a snake, it can easily be clean on the connector end and be almost eaten away inches or feet up the wire. if you can do a continuity check from one end of the connector to the other end, it should be >.05ohms (im sure the spec is more, but less is better). ive found semi-clean copper for over 2 feet then it turned into the nasty blue/green dust. corrosion is a *****.