So I found an old thread I actually posted about the 105a alternator swap.  LOL  Has some decent info and some part numbers in it as well.  I've got a call in to Brent|removethispart|@TT right now about their bracket.  Waiting on him to call me back.  That seems like the way to go if I'd going to replace the alternator.

Just wanted to bump this thread and  let everyone know I got the alternator swapped out.  I used a 94a 12SI GM unit.  I'll post the part number at the bottom of this post.  Everything was very straight forward.  There is a 2 wire plug on the back side on the alternator.  You will need the pigtail for this.  I read in one of the articles somewhere how to hook this up.  The red wire I jumped back to the main post on the back of the alternator.  The white wire gets spliced into on of the 2 wires that went into the plug that plugged into the back of the stock alternator.  Evidently the colors changed from year to year on the wires.  Mine was the white wire.  Pick one, doesn't matter which one.  Start by just twisting the wires together and make sure they're not touching anything.  Start the truck.  Now turn the truck off.  If the truck keeps running and doesn't turn off like it should, you have the wrong wire (I picked the black one first. LOL)  IF this happens, just pull the wires apart to kill the truck.  Splice into the other wire and you're golden.  So far, everything is working great.


Lester Number:  7294-3

Any auto parts store should be able to cross reference that number.

I recently purchased a 91 Samurai, and the other day while flinging myself around in the ice, my brights indicator light comes on and I lost all my dash lights. I am wondering if this is related to a funky starting problem I am having as well. I occasionally have to do a dance to get the thing started. Turn off the fan, radio, wait till the seatbelt buzzer stops it's annoying twitter, then I can usually start it. Sometimes I use magic to start it, like clutching a few times, screwing with the shifter, or just giving the truck a dirty look. I assume something came loose.....any suggestions?

I recently purchased a 91 Samurai, and the other day while flinging myself around in the ice, my brights indicator light comes on and I lost all my dash lights. I am wondering if this is related to a funky starting problem I am having as well. I occasionally have to do a dance to get the thing started. Turn off the fan, radio, wait till the seatbelt buzzer stops it's annoying twitter, then I can usually start it. Sometimes I use magic to start it, like clutching a few times, screwing with the shifter, or just giving the truck a dirty look. I assume something came loose.....any suggestions?

Check your grounds.  Also your taillights.  Not sure about Sammis, but you often lose your dash lights if you lose your taillight fuse.

i hope someone can figure this out cause my 91 tracker is doing the same thing exactly charges just enough to keep the thing starting but only if i run no lights ,all the same issues new alt. new battery . ive noticed it starts to discharge if i rev the engine while testing the voltage also , weird but i need an answer too thanks

like beer check said check all battery connections, One of the most overlooked things in my opinion. Remove both neg and pos and clean them an put them back together. Make sure the battery ground goes onto the engine block somewhere.

Ground wires not connected do some very strange things...
My old sami, when I would shift into 5th. the wipers would come on... I was working on something one day under the hood and I saw a broken ground wire that I had no idea what it went to... I figured it was there for a reason... reattached it. Later I was driving, made the 4th to 5th shift and the wipers did not come on!!!!


I have no idea why the broken ground caused that, but it sure fixed it!!!!


CRAZY   

Low output is usually due to defective diodes in the alternator which convert the AC output to DC. There are usually six of these inside the alternator, three on a heat sink and three on what kinda looks like a IC chip with four ring terminals on it. If any of these short out or open, output is greatly reduced. The auto parts store though, should have detected this when they tested it. Flickering and a jumpy voltmeter is usually worn out brushes.

finally got the problem fixed .after 2 alts. and a batt . turns out the serpentine style belt on the little booger was slipping . no squeal no apearent loosness . a old guy who runns an alt shop ,told me he had ran across this problem a few times with trackers . changed the belt to one with cross groves as well as length ways groves these grip the pully better . it fixed it for 8 bucks . 3 months later its a dang belt . i hope its helps some others .