2nd Dead Alternator (2 Viewers)

[Neuner]

Had a couple of strange little electrical issues like the radio reseting to default on its own for our '99. Then the alternator went out on an errand trip.

Took it out and since I couldn't find OEM, had a local pro shop rebuild the aftermarket that was in it. Rectifier was fried.

Small electrical issues went away.

It has been a couple of months and the rebuilt went out while we're on a long trip. I'm going to replace it with an aftermarket to get us back home and claim warranty on rebuilt.

My question is, is this a freak occurrence or is there something else going on that is frying the alternator that is common with 100 series?

 

[Trunk Monkey]

Not common on the 100. Some more info about your truck would help - miles, any aftermarket electrical gadgets.

I would go with an OEM since it appears both aftermarket and rebuilt are giving you issues.

 

[Neuner]

300k+ miles.

We bought at 280k so still learning it and not sure what all has been done to it. Kept stock and we'll maintained.

Found hard to read PO receipt of headlight assemblies needing replacement cause of headlight lamp connection melting/shorting which is really weird.

On road 900 miles from home so aftermarket is temp

 

[hoser]

Poor corroded connections can cause alternator failure.

SOLVED: 100 Series overcharging issues (1998-2002 charging setups)

This has been documented on a few other threads but I figured I would add a definitive OEM solution for this problem. Background: A few weeks ago my mother's 1998 LX470 started up with an illuminated battery light. I the volt-meter in the cluster read 18V+ so I used the spare tire kit (there's...

forum.ih8mud.com

Charge wire corroded and broke at alternator

So I was having intermittent charging problems and went to have the alternator tested and was told the voltage regulator was bad. It started working again and I went to replace the alternator and found the charge wire was corroded and broke off. I’m going to upgrade to the 130 amp alternator and...

forum.ih8mud.com

 

[Eicca]

My parents’ 100 just experienced multiple alternator failures and I believe it was bad connections/corrosion causing the alternator to perceive a low state of charge and then cook itself.

It appears to be resolved after replacing the positive terminal clamp, replacing the ALT and ALT-S fuses in the battery terminal fuse box, and also disassembling and cleaning that fuse box and all connections between the battery and the alternator.

In short, making sure all connections between the battery and alternator are perfect so it doesn’t think it needs to work overtime.

 

[Neuner]

The 3 wire connector busted. Going to look for a new one but I think I'm out of luck finding one.

Can I run without it till I get home?

 

[Neuner]

Thankfully found connection replacement

 

[Neuner]

I think the black wire tan stripe had disconnected at the alternator prior to removal. Not sure what it does and if it could have caused the alt to overwork?