Running 4 1999 P80s and having another 4 in my close FF list , I have accumulated 2x each of starters and alternators rebuilt at my friend Sam.

I can pop in a known good partand work the rebuilt parts train until EndofDays


Same here, except I just keep entire spare cars on hand, haha ...

I took it to another shop who tried to test it but it would not even allow them to power it up.


This makes me think the exciter wire isn't able to kick-start things & you might have an open circuit on your regulator between the exciter pin and positive terminal on your alt.;

Do you get the ...

I picked up a salvage alternator over the weekend & all's good. Key on, I get my battery dash light, and started up it's passing 14.4v across the positive terminal now.

I also ordered the regulator and confirmed the old one is bad, as the new one (and the salvage alt.) read 10 mega ohms across the ...

@ BEJinFbk Thank you - again, I only grounded it to prove the Charge dash light actually works and wasn't burnt out. A little confused why Volvo would rely on the actual circuit rather than a secondary test circuit for such things, but alas, such pondering is of little use :)

@WhatAmIDoing The ...

I have pulled the alternator, and removed the regulator.

Can anyone tell me which points on the reg. should have continuity? Again, the exciter pin doesn't seem to ever reach ground, as the dash light never comes on, but does come on when I directly ground the exciter wire.

TIA!

BEJinFbk wrote: 06 Feb 2023, 12:21 What is the voltage at the alternator
when the car is running?

12.4-ish volts, same as battery (well a little less) with car off. It's not putting out any charge. FWIW, also checked continuity on Big Red Fatty (main + cable) from alt. to battery, it's 0.00 ohms

WhatAmIDoing wrote: 06 Feb 2023, 11:10 I would just order a new voltage regulator, ~$40. Reduced the risk of having to do it again.

Can you advise where I can source this? The only inexpensive ones were Chinese-made on Ebay from relatively unknown sellers.

IPDUSA has them for around $200

Great advice, all.

Since my power steering pump makes a lot of noise, I'll change it at the same time. So that makes removing the alt. clearly the best approach.

I'll remove the pump and alt. in the next cpl days, then I'll take a look at the regulator and see if there's clear damage I can repair ...

Hi Folks,

The symptom is no charge from the alternator.

- Charge dash light does NOT illuminate with the others when I key-on before starting - does not come on at all.
- Charge dash light WILL illuminate if I manually ground the exciter wire (small red/white wire normally attached to the alt ...

I realize this is a somewhat ancient thread, but I ran across this today when looking for advice, and thought I'd post in case anyone else finds themselves struggling with installation of the stock muffler/pipe assembly. Which, I mean c'mon, they could have put a flange over the rear axle.... but ...