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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

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Blower not working

Post by marcusmcd »

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.
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Re: Blower not working

Post by Ozark Lee »

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.

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Re: Blower not working

Post by sleddriver »

Check Volvowiringdiagrams for your 850.
1998 V70 T5 226,808 miles. Original Owner.
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Re: Blower not working

Post by abscate »

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

Post by erikv11 »

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, 293k
'06 S60 R, 167k
'07 XC70, 170k
'99 Camry V6 :shock: 130k
gone: '96 NA 850 210k, '98 NA V70 182k
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