2000 Land Cruiser reman denso alternator install issue

[caronfire123]

2000 Land Cruiser alternator issue:
Just bought a reman Denso from the Toyota dealership and installed over the weekend. When I was taking it out I broke the housing for the plug so the clip has broken off and I pulled on the wires a bit but I didn’t look like I did too much damage. I put everything back together and it turns on everything sounds good and I’m at 14+v I drive it around and it drive really nice. I take it out later that night and notice the lights dimming and flickering but I’m still getting 14v. Next morning I turn it on and check again I’m at 12v. Here’s the question do I need to change the plug or do I have a defective alt? And yes I did clean the plugs out and made sure it was pushed in it’s a really tight fit.

 

[SteveH]

I broke the harness clip trying to get that miserable thing off the OEM alternator, so I know what you're up against.

You might need to do a more methodical baseline of the charging system:

1. Fully charge the battery and test the volts at the battery with the engine off - should see 12.65-ish
2. The start the engine and measure volts at the battery - should see 14.2 or more
3. Then turn on every electrical accessory you can find (fan, headlights, rear defroster, cig lighter) and test the volts - should still see 14+, may want to increase RPM and watch volts.
4. Have someone watch the voltage while you wiggle the wiring harness to the alternator - should see no change in volts measured at battery.

Do this and let us know what you learn. You have to get to the point where you have a repeatable fault before you can declare some particular part or harness to be bad.