Charging issue

[Sveedy]

The '99 V70 decided not to start yesterday. Turned the key, it tried, and then nothing but dash lights. I checked the voltage and it was only at apx 11v. I put the charger on it and a hour later it started. Let it charge for a few hours and it was at 12.4v.
This morning it was still at 12.4. Started again, took it for a short drive, and checked it while running and it was only at 12.2v. Shut it off and it went up to 12.3v. So I'm thinking that I have a issue with the alternator, not a parasitic draw.

My question is whether this year of alternator has the replaceable internal regulator, or am I stuck replacing the whole alternator. I seem to remember reading about the regulator being the most likely culprit.

[scot850]

It should have whether you have a 100A or 120A alternator.

Item #3 on Volvo parts list:

https://www.volvocarstorontoparts.ca/p/ ... 67899.html

120A regulator:

https://www.fcpeuro.com/products/volvo- ... h-30667899

Some websites seem to claim they both use the same regulator 100A or 120A. I think that NY98 still had 100A alternators and 99- the 120A.
As you probably know, the rating is normally on a label on the visible topside of a Volvo alternator.

Neil.

[Vova585]

Before buying any parts- check your voltage at alternator. 1 wire to the alternator case, another to positive cable at the alternator(may use alligator jaw connector). You need to first make sure you dont have bad ground or positive cable

[Sveedy]

Yep, it's a 120 amp. And yep, the grounds and cable are all good.
It looks like a pretty easy swap.

Thanks guys !