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850 heated seats

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

Covert
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Year and Model: 1997 850
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Covert

850 heated seats

Post by Covert » Tue Oct 18, 2016 7:32 am

on with the list of things that dont work on the 850¬!
last owner said the heated seats were a god send in the winter , lights come on on the switch, but seats dont get warm , problem i have is im never in the car very long so dont know how long they are meant to take to get warm ??
have heard stories of connection problems and not the actual heating element itself , just hoping this is true......

Many thanks for any info.
Cheers Mark.

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Clemens
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Year and Model: 96 855 R + 94 855 T5
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Clemens

Re: 850 heated seats

Post by Clemens » Tue Oct 18, 2016 11:12 am

you should feel them after 2-3 Minutes, maybe quicker if you don´t have leather/suede.

Check if you have 12V under the seat (be sure to get the right connector, the SIPS-bag is wired in the seat as well). If you do have 12 Volt there check if the temp feeler has slid out of the seat. if not it is likely your heater mat is broken.
If you don´t have 12 Volt at the seat you are lucky because you might have a Connection Problem which is a lot easier than replacing a broken heater mat.
Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V

scot850
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scot850

Re: 850 heated seats

Post by scot850 » Tue Oct 18, 2016 11:51 am

There are 2 types of wiring to the seats and I don't know when they changed. The 93 850 we had had 2 wires then ran up to the seat heater mat from the middle under the seat. There is a hollow in the under foam that these went up into. Problem was they were unsupported and over the years with the seat being moved it either breaks the wires or most often the connectors to the mat up inside the foam which is a pain to access even with the seat out. The newer version has the wires better supported at the back of the seat but again they can just fail with age. I'm not sure if the old style mats are even available any longer, I do believe the are obsoleted but not 100%. I think I have read that the later style can be substituted, but it requires the seat cover to be removed. I believe there is a how-to somewhere on MVS.

Neil.
2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

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Clemens
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Clemens

Re: 850 heated seats

Post by Clemens » Tue Oct 18, 2016 1:05 pm

I parted out a seat a few month back and have to say it´s a real pita. Can´t imagine putting that upper cover on properly. The lower one shouldn´t be too hard.
Summer: 1996 855 R
Winter: 1994 855 T5M
Donor: 1995 854 10V

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cmblackburn
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cmblackburn

Re: 850 heated seats

Post by cmblackburn » Tue Oct 18, 2016 2:27 pm

the SIPS-bag is wired in the seat as well
Common misconception. They are mechanically activated in the 850 and 98 S70. SIPS became electronic in the 99 MY cars.

As for repairing the seat, test the ohms at the seat connector for resistance, and check for power on the car side of the harness with the switch on. I had a blown fuse in my S70 as well as a wire that fell off of the thermostat in the seat.[/quote]
1998 S70 T5, 267k "The Blue Turd" Dead again, manual swapping
2004 S40 2.4i, 164k "Cosmo"
2001 Ford Escape XLT, 198k "The Magic School Bus"

Covert
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Covert

Re: 850 heated seats

Post by Covert » Tue Oct 18, 2016 2:37 pm

Its a 1997 car , does anyone know what colour connector it should be ?
Ive checked the fuses today and they are all fine , both lights come on ,on the switches but nothing happens on either seat .
Ill have a play with them in the morning see if the connector is getting 12v
Thanks for the advice chaps .....

beigg
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beigg

Re: 850 heated seats

Post by beigg » Tue Oct 18, 2016 5:01 pm

Black if I remember right. I converted over to the 2000+ seats. Equally as painful setup, but newer and was cheaper solution that was more comfortable.
ugh smh 850 Turbo fridge

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rspi
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rspi

Re: 850 heated seats

Post by rspi » Tue Oct 18, 2016 6:30 pm

'95 855 T-5R M, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red 25/32 mpg
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Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, 960's, '98 S70 GLT, '95 850 T-5R YellowVolvo Repair Videos

Covert
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Covert

Re: 850 heated seats

Post by Covert » Tue Oct 18, 2016 11:03 pm

Video explains lots , so will they "only" come on if the temp is below 56 ?

Covert
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Covert

Re: 850 heated seats

Post by Covert » Wed Oct 19, 2016 12:44 pm

Well dig under the drivers seat today and the red wire has come off the thermostat, so Fingers crossed once this is sorted it will work, havent had a chance to have a look at the pasengers seat yet ........

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