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96 850 abs module repair

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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danton
Posts: 8
Joined: 19 October 2010
Year and Model: 850 96
Location: mt arlington, nj

96 850 abs module repair

Post by danton »

Hi, steve in mt arlington nj with 96 850 (1st volvo for me) 200+ miles. abs and trac lights on, speedo reads 40-45 (erratic). After reading some posts on volvo forum and elsewhere determined it to be abs mod and being somewhat electro/mechanical applied 40w iron to pins for minute or less(counted seconds) without taking apart. now, lights off but speedo still not working right. some light solder coating on pins and on two you can see some (very little) plastic bulge at base from heating. Will get pics if really needed.
Does anyone know the pins that control the speedo and I will try to reheat? I might get a rebuilt from matty moo.
Thanks to any that respond.

Matty Moo
Posts: 1810
Joined: 12 October 2008
Year and Model: 850, 1996
Location: Ann Arbor, MI
Has thanked: 1 time
Been thanked: 30 times

Post by Matty Moo »

I replied to your email

Not sure if you meant it always reads 40-45, or after your repair. It's hard to say that you ruined it since the fault lights are off, but you pulled the solder down, which isn't really a good thing. A bulged case isn't a great sign either.

could be a cluster problem, but it's hard to say. I haven't heard of any 850 clusters acting up like that.
Image
http://www.midwest-abs.com
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1996 850 Platinum Wagon. ARD Green Tune, OBX.-Gone
1998 s70 ARD tune, EST exhaust, SE/R interior.
1999 s70 Plain Jane.
2000 s70 GLT
2014 Ram
2012 Jeep Wrangler Unlimited

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