IPD sale XeMODeX - Experts in Volvo Electronics
Did you know? 🤔
Logged in users can get email notification of topic replies Log in or register (free).
Amazon Link Buy your stuff using this and it helps MVS!

Blower not working

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

marcusmcd
Posts: 22
Joined: Sat Feb 22, 2014 12:35 pm
Year and Model: 850 1996
Location: Midland, Texas
Has thanked: 0
Been thanked: 0
United States of America
marcusmcd

Blower not working

Post by marcusmcd » Fri Aug 12, 2016 6:22 pm

The blower sometimes would kick in but usually doesn't, with the ECC lights flashing a few times. I pulled the blower motor and lubricated it, watched it spin a bit before reinstalling it. But then nothing. Pulled pulled it back out and checked voltage at its terminals. Nothing. I also pulled the resistor and checked its voltage at each terminal lead for both the four small wires and the two large ones. Nothing. Fuses are good.

Perhaps I do not have a good ground for the meter. What is a good grounding location in the passenger compartment? I tried the bolt that holds the seats in place.

If there is no voltage coming to the resistor, where would I look to find the fault?

What other things might I check. Chilton's doesn't include these circuits in the pertinent manual.

Ozark Lee
MVS Moderator
Posts: 14798
Joined: Thu Sep 07, 2006 8:24 am
Year and Model: Many Volvos
Location: USA Midwest
Has thanked: 4 times
Been thanked: 49 times
United States of America
Ozark Lee

Re: Blower not working

Post by Ozark Lee » Fri Aug 12, 2016 7:26 pm

If you get no voltage at the connector with the large wires then the fuse is bad. There are two fuses for the climate unit, check both of them. If you ground the blue wire the blower should come on at full speed, even with the key off. The bolt at the seat should be a suitable ground.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

User avatar
sleddriver
Posts: 975
Joined: Thu Apr 08, 2010 6:06 pm
Year and Model: 1998 V70 T5
Location: Tx
Has thanked: 11 times
Been thanked: 11 times
United States of America
sleddriver

Re: Blower not working

Post by sleddriver » Sat Aug 13, 2016 6:13 pm

Check Volvowiringdiagrams for your 850.
1998 V70 T5 226,808 miles. Original Owner.
M1 10W-30 HM

User avatar
abscate
MVS Moderator
Posts: 19670
Joined: Sun Feb 17, 2013 5:54 pm
Year and Model: 99T5 ,99S70,2005V70
Location: NYC, ALBANY NY
Has thanked: 248 times
Been thanked: 806 times
Trinidad & Tobago
abscate

Re: Blower not working

Post by abscate » Sun Aug 14, 2016 5:52 am

The wiring diagrams are On the internet but we do not host them here by a mutual agreement with Volvo/MVS.
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

User avatar
erikv11
Posts: 9426
Joined: Sat Jul 25, 2009 2:03 pm
Year and Model: 850, S/V70, 06 S60R
Location: Iowa
Has thanked: 74 times
Been thanked: 237 times
United States of America
erikv11

Re: Blower not working

Post by erikv11 » Sun Aug 14, 2016 7:18 am

What sleddriver said (http://www.volvowiringdiagrams.com/).
'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 145k
'98 S70 NA, 220k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 285k
'06 S60 R, 160k
gone: '96 NA 850 210k, '98 NA V70 182k

Post Reply
  • Similar Topics
    Replies
    Views
    Last post