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850 dash warning lights Topic is solved

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

crlande
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Year and Model: 240DL;850;S70
Location: Lehigh Valley, PA
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crlande

850 dash warning lights

Post by crlande » Tue Jan 28, 2020 1:04 pm

Ok board members, I got one for you... Hopped in my 850 this morning and started off to work. Less than mile and all the warning lights and headlights start to flicker. Turn around and hop in another car. This afternoon the car fires up, the air pump sounded muffled compared to the usual wind up, all warning lights are on, occasional flicker but all on. I jiggled some cables under hood, fiddled with the key while in ignition, turned on accessories, windows, headlights with nothing different. Car idles fine and starts each time. Did not check the diagnostics boxes under hood yet. Where the heck do I start diagnosing?
Thanks,
Carl

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misha
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Year and Model: '97 850 2.5 20v
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misha

Re: 850 dash warning lights

Post by misha » Tue Jan 28, 2020 1:53 pm

Ignition switch or alternator.
'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

Cookeh
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Joined: Mon Jan 14, 2019 11:00 am
Year and Model: 1995 Volvo 850 T5
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Cookeh

Re: 850 dash warning lights

Post by Cookeh » Tue Jan 28, 2020 2:57 pm

I'm with misha on this one, you can test the ignition barrel/switch by jiggling the keys slightly with engine running and seeing if that temporarily fixes the problem.

crlande
Posts: 288
Joined: Sat Jul 27, 2013 8:48 pm
Year and Model: 240DL;850;S70
Location: Lehigh Valley, PA
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crlande

Re: 850 dash warning lights

Post by crlande » Tue Jan 28, 2020 3:11 pm

Yes I thought the same. Tried jiggling the key in ignition several times, no difference.

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misha
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misha

Re: 850 dash warning lights

Post by misha » Tue Jan 28, 2020 4:27 pm

Did you checked the alternator output voltage?
'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

crlande
Posts: 288
Joined: Sat Jul 27, 2013 8:48 pm
Year and Model: 240DL;850;S70
Location: Lehigh Valley, PA
Has thanked: 1 time
Been thanked: 20 times
United States of America
crlande

Re: 850 dash warning lights

Post by crlande » Tue Jan 28, 2020 6:46 pm

I have not checked the voltage output yet.
Thanks for your idea/ information.

crlande
Posts: 288
Joined: Sat Jul 27, 2013 8:48 pm
Year and Model: 240DL;850;S70
Location: Lehigh Valley, PA
Has thanked: 1 time
Been thanked: 20 times
United States of America
crlande

Re: 850 dash warning lights

Post by crlande » Wed Jan 29, 2020 3:03 pm

Two days of doing nothing to car, the battery was 12.2 with engine off. Started car and battery was 11.5 while engine running. I am leaning towards alternator issue.

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misha
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Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
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misha

Re: 850 dash warning lights

Post by misha » Wed Jan 29, 2020 3:24 pm

Check voltage output directly on alternator....on b+ and alternator housing.
We need this to determine if alternator is bad or battery cables are bad.
These users thanked the author misha for the post:
crlande
'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

crlande
Posts: 288
Joined: Sat Jul 27, 2013 8:48 pm
Year and Model: 240DL;850;S70
Location: Lehigh Valley, PA
Has thanked: 1 time
Been thanked: 20 times
United States of America
crlande

Re: 850 dash warning lights

Post by crlande » Thu Jan 30, 2020 12:40 pm

Today the battery was 12.2 before starting. The B+ and alternator housing was 11.45 as was the battery 11.45 while running.

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misha
Posts: 4144
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 49 times
Been thanked: 112 times
Serbia
misha

Re: 850 dash warning lights

Post by misha » Thu Jan 30, 2020 1:33 pm

Yep....alternator is shot.
Could be voltage regulator or the alternator itself.
'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

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