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Battery light on. New Alt and Batt.

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

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

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alpha318
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Year and Model: 98 V70 XC C#505073
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alpha318

Battery light on. New Alt and Batt.

Post by alpha318 » Mon Jun 22, 2020 10:03 pm

Hello everyone!
I have a 98 Volvo V70 XC Chassis#505073

I have a curious problem...

I have recently, within the last few weeks, replaced my alternator, serp Belt, idler pulley and tensioner. The battery was also replaced the same day.

Today, my battery light came on. I tested the battery, and alternator, and both tested good.
I also tested the alternator while loaded (lights on, fan on high)
And that tested good.

A curious quirk though, when I bump the throttle, the light goes away. Then it comes back on after a few seconds. Then after some idleing, the light stays off for good.

Aside from a slight rough idle, everything feels fine.
Any ideas?

Replacement Alternator was a Ultima Alternator from O'Reilly's.
Those who say, "Money can't buy happiness", obviously never bought a turbo charged car, or paid a pet adoption fee!

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RickHaleParker
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RickHaleParker

Re: Battery light on. New Alt and Batt.

Post by RickHaleParker » Mon Jun 22, 2020 10:14 pm

alpha318 wrote:
Mon Jun 22, 2020 10:03 pm
A curious quirk though, when I bump the throttle, the light goes away. Then it comes back on after a few seconds. Then after some idleing, the light stays off for good.
Check the battery cables and B+ line for corrosion. Grounds are importation too.
--------
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abscate
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abscate

Re: Battery light on. New Alt and Batt.

Post by abscate » Tue Jun 23, 2020 3:06 am

Make sure the exciter wire in the back is clean and non oily

If that’s good, it’s alternator Tetris back to O..o...o....o Reilly’s for anew unit
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