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upgrade charging system?
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Re: upgrade charging system?
After checking the connectors, the alternator output under load hovers at 13.56v. The voltage drop test with B+ is 0.28, while voltage drop at battery negative (-) terminal is 0.06, both at 1500-2000 rpm.
Alternator charging never goes above 13.60v.
Alternator charging never goes above 13.60v.
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Golden Retriever | 2014D VIDA DiCE | 2020 V60CC | 2013A XC90 +150mi/241km | 2001 V70XC +200mi/322km
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- misha
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Re: upgrade charging system?
Did you measure directly on alternator or on battery terminals?
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
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Re: upgrade charging system?
The set up for voltage drop test using multimeter, and then increasing rpm to 1500-2000:
Black probe at negative (-) battery terminal while red probe at the alternator casing, it reads 0.06v.
Red probe at positive (+) battery terminal while black probe at the B+ post at alternator, it reads 0.28v.
Black probe at negative (-) battery terminal while red probe at the alternator casing, it reads 0.06v.
Red probe at positive (+) battery terminal while black probe at the B+ post at alternator, it reads 0.28v.
--
Golden Retriever | 2014D VIDA DiCE | 2020 V60CC | 2013A XC90 +150mi/241km | 2001 V70XC +200mi/322km
Past: German Shepherd | 1997 Volvo 854 | 1989 Volvo 740 GL | 1979 Volvo 240
Golden Retriever | 2014D VIDA DiCE | 2020 V60CC | 2013A XC90 +150mi/241km | 2001 V70XC +200mi/322km
Past: German Shepherd | 1997 Volvo 854 | 1989 Volvo 740 GL | 1979 Volvo 240
- misha
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Re: upgrade charging system?
Check output directly on the alternator while engine is idling.
Red probe on b+ on alternator and black on it's housing.
You should get 14-14.2v at idle.
If not...voltage regulator or alternator are faulty.
If you do....b+cable needs to be replaced because the voltage doesn't get to the battery.
Voltage drop needs to be checked after driving the car for at least 30min and without turning the engine off prior to voltage drop testing.
Red probe on b+ on alternator and black on it's housing.
You should get 14-14.2v at idle.
If not...voltage regulator or alternator are faulty.
If you do....b+cable needs to be replaced because the voltage doesn't get to the battery.
Voltage drop needs to be checked after driving the car for at least 30min and without turning the engine off prior to voltage drop testing.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
- abscate
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Re: upgrade charging system?
That’s a big drop on the B+
Do you have an IR gauge you can check the temperature of the cable after 15 minutes running with all the lights on ?
Do you have an IR gauge you can check the temperature of the cable after 15 minutes running with all the lights on ?
Empty Nester
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary
A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW
Link to Maintenance record thread
Link To Volvo Glossary
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- Posts: 2850
- Joined: Sat Dec 03, 2011 8:05 am
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Re: upgrade charging system?
Cold start and idle reads/hovers 14.08-14.12v with your set up misha. So cable?misha wrote: ↑Wed Dec 25, 2019 3:39 pm Check output directly on the alternator while engine is idling.
Red probe on b+ on alternator and black on it's housing.
You should get 14-14.2v at idle.
If not...voltage regulator or alternator are faulty.
If you do....b+cable needs to be replaced because the voltage doesn't get to the battery.
Voltage drop needs to be checked after driving the car for at least 30min and without turning the engine off prior to voltage drop testing.
--
Golden Retriever | 2014D VIDA DiCE | 2020 V60CC | 2013A XC90 +150mi/241km | 2001 V70XC +200mi/322km
Past: German Shepherd | 1997 Volvo 854 | 1989 Volvo 740 GL | 1979 Volvo 240
Golden Retriever | 2014D VIDA DiCE | 2020 V60CC | 2013A XC90 +150mi/241km | 2001 V70XC +200mi/322km
Past: German Shepherd | 1997 Volvo 854 | 1989 Volvo 740 GL | 1979 Volvo 240
- misha
- Posts: 4577
- Joined: Sun Dec 07, 2008 4:09 pm
- Year and Model: '97 850 2.5 20v
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Re: upgrade charging system?
Yep!
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
-
- Posts: 2850
- Joined: Sat Dec 03, 2011 8:05 am
- Year and Model: 2.0/2.4/3.2
- Location: Great Lakes - USA
- Has thanked: 29 times
- Been thanked: 55 times
Re: upgrade charging system?
--
Golden Retriever | 2014D VIDA DiCE | 2020 V60CC | 2013A XC90 +150mi/241km | 2001 V70XC +200mi/322km
Past: German Shepherd | 1997 Volvo 854 | 1989 Volvo 740 GL | 1979 Volvo 240
Golden Retriever | 2014D VIDA DiCE | 2020 V60CC | 2013A XC90 +150mi/241km | 2001 V70XC +200mi/322km
Past: German Shepherd | 1997 Volvo 854 | 1989 Volvo 740 GL | 1979 Volvo 240
- misha
- Posts: 4577
- Joined: Sun Dec 07, 2008 4:09 pm
- Year and Model: '97 850 2.5 20v
- Location: Serbia
- Has thanked: 67 times
- Been thanked: 176 times
Re: upgrade charging system?
Usually the part from positive battery terminal to starter is the one which fails.
In your case you should replace the negative too.
Replacement MUST be the same thickness as original or slightly thicker...but DO NOT replace it with thinner cable.
25mm2 is EU spec....i guess that this is equal with 2awg(U.S)but check the conversion table.
In your case you should replace the negative too.
Replacement MUST be the same thickness as original or slightly thicker...but DO NOT replace it with thinner cable.
25mm2 is EU spec....i guess that this is equal with 2awg(U.S)but check the conversion table.
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS
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