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Intermittent electrical problems: power windows and A/C

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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kumulipo
Posts: 11
Joined: 6 February 2018
Year and Model: 1999 S70
Location: Merrickville, Ontario
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Intermittent electrical problems: power windows and A/C

Post by kumulipo »

Having problems with power windows from time to time. Turning the engine off and on usually restores function. A/C now doing the same thing. Suggestions? Thanks!

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wizechatmgr
Posts: 1798
Joined: 12 January 2017
Year and Model: 1999 V70 XC AWD 2.4T
Location: Albany, NY area
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Post by wizechatmgr »

Ignition switch or bad relays would be my first thoughts.

Pull and check the relays in the small fuse box (assuming yours is like my v70)
You may find some are badly in need of cleaning with a wire brush or just outright are ready for replacement.

Note that I'm not an expert by any means with the S series.
Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD 2.4 T -- ~231k miles
1998 V70 2.4 NA -- ~184k miles

kumulipo
Posts: 11
Joined: 6 February 2018
Year and Model: 1999 S70
Location: Merrickville, Ontario
Has thanked: 7 times
Been thanked: 1 time

Post by kumulipo »

Thanks for your reply. I've been away for a few days, hence my delay in responding. I will check things out! BTW, the S70 and V70 seem to be the same thing, just finished differently aft. Cheers!

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