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voltage regulator or alternator?

Help, Advice and DIY Tutorials on Volvo's P80 platform cars -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, including 850 R, 850 T-5R, 850 T-5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70
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rp850
Posts: 67
Joined: 23 March 2005
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voltage regulator or alternator?

Post by rp850 »

I tested my battery today with the car off and it's reading about 11.7 volts. Didn't start on its own. With the car on (jumped), it's about 12.8. The 75 month battery is less than a year old. Car started fine with the jump. Two questions:

1. How do I tell if it's the voltage regulator or the alternator?

2. Is the voltage regulator integrated with the alternator?

Thanks!
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rp850
Posts: 67
Joined: 23 March 2005
Year and Model:
Location:

Post by rp850 »

It was the battery...
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