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Issue after battery wrong connection...

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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misha
Posts: 4077
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 39 times
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Serbia
misha

Re: Issue after battery wrong connection...

Post by misha » Fri Dec 27, 2019 2:04 pm

Check alternator output....just in case.
Besides J relays,alternator diodes could also fail in this case.
'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

30CSI
Posts: 6
Joined: Wed Dec 25, 2019 10:56 am
Year and Model: 1996 850 glt
Location: Toulouse
Has thanked: 4 times
Been thanked: 1 time
France
30CSI

Re: Issue after battery wrong connection...

Post by 30CSI » Fri Dec 27, 2019 2:20 pm

Thanks, I did and was surprised😊 but the regulator ( and alternator) are working fine...

User avatar
misha
Posts: 4077
Joined: Sun Dec 07, 2008 4:09 pm
Year and Model: '97 850 2.5 20v
Location: Serbia
Has thanked: 39 times
Been thanked: 102 times
Serbia
misha

Re: Issue after battery wrong connection...

Post by misha » Fri Dec 27, 2019 3:29 pm

Go for a lottery ticket! ;)
'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

User avatar
Clemens
Posts: 1094
Joined: Thu Sep 03, 2015 12:34 pm
Year and Model: 96 855 R + 94 855 T5
Location: Austria
Has thanked: 75 times
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Austria
Clemens

Re: Issue after battery wrong connection...

Post by Clemens » Fri Dec 27, 2019 4:15 pm

On your 96 the ABS light is probably triggered by a bad solder joint in the ABS module. The procedure to fix is quite easy: you basically cut the box open, resolder the pins, put it back together and seal the housing.
For a good writeup search the forum. Also, you need an E5 bit to remove the ABS module. Or a 4mm hex socket. The E5 is better, though I have removed mine a few times wirh the 4mm hex.
Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V

30CSI
Posts: 6
Joined: Wed Dec 25, 2019 10:56 am
Year and Model: 1996 850 glt
Location: Toulouse
Has thanked: 4 times
Been thanked: 1 time
France
30CSI

Re: Issue after battery wrong connection...

Post by 30CSI » Fri Dec 27, 2019 5:09 pm

Thanks Clement, I think you are right because issue occurs intermittently, so I will check tomorrow... Br
F.

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