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Sunroof stopped 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
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Mstrshkbrnnn
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Sunroof stopped working

Post by Mstrshkbrnnn » Tue Aug 27, 2019 11:35 am

Hey guys, I recently purchased a 96 850r (three weeks ago now), and upon purchasing, the sunroof worked. The car came with an aftermarket head unit that stays on at all times. It doesn't draw enough power to kill the battery overnight. Last week though, I got sick, and didn't drive the car for a few days. When I went to go drive it again, the battery had died, and after jumping the car, the sunroof stopped working, and hasn't worked since. I'm not very well versed in electrical diagnosing so any help from you guys would be much appreciated.


'94 854 NA 287k (bought for $400)
'98 s70 GLT 243k (bought for $250 currently non running)
'96 854R 173K (bought for $900)

Mstrshkbrnnn
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Re: Sunroof stopped working

Post by Mstrshkbrnnn » Tue Aug 27, 2019 11:37 am

Also, the driver window, and rear passenger side window don't work. Do you guys think the regulators are broken on each window, or is it the switch assembly that should get replaced?


'94 854 NA 287k (bought for $400)
'98 s70 GLT 243k (bought for $250 currently non running)
'96 854R 173K (bought for $900)

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Re: Sunroof stopped working

Post by abscate » Tue Aug 27, 2019 11:38 am

Much more likely the switch than three regulators.

The low battery probably tripped the safety in the sunroof - get the battery up to full charge, then try opening/locking the doors several times


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Mstrshkbrnnn
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Re: Sunroof stopped working

Post by Mstrshkbrnnn » Wed Aug 28, 2019 12:48 pm

abscate wrote:
Tue Aug 27, 2019 11:38 am
get the battery up to full charge, then try opening/locking the doors several times
I tried this, but it didn't work.


'94 854 NA 287k (bought for $400)
'98 s70 GLT 243k (bought for $250 currently non running)
'96 854R 173K (bought for $900)

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Re: Sunroof stopped working

Post by jimmy57 » Wed Aug 28, 2019 1:22 pm

Have you checked fuses? WHen the battery gets low and some motor items are operated their current draw will be twice or more of normal and can blow a fuse. That car doesn't have any "fancy" electronics involved in its accessories. There is no reset for an 850 if the battery is disconnected. 97 year model with Guard Alarm II with those slender remotes is about as complex as that car gets.



Mstrshkbrnnn
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Re: Sunroof stopped working

Post by Mstrshkbrnnn » Thu Aug 29, 2019 10:54 am

I checked the fuse box, and there isn't a sunroof fuse


'94 854 NA 287k (bought for $400)
'98 s70 GLT 243k (bought for $250 currently non running)
'96 854R 173K (bought for $900)

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Clemens

Re: Sunroof stopped working

Post by Clemens » Thu Aug 29, 2019 1:50 pm

there has to be a fuse. it might be hidden in a different circuit, though. according to this link it should be fuse 35:

http://www.volvotips.com/index.php/850- ... ce-manual/


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Re: Sunroof stopped working

Post by BEJinFbk » Thu Aug 29, 2019 3:27 pm

There are two points of protection for the sunroof.
The “control” fuse in location 35 that also supplies
dash and ashtray illumination and one of the leads
on the accessory connector. Do your dash lights work?

Is anything connected to the accessory connector under
the dash, next to the steering column. If you have a hinky
stereo installation, anything’s possible.

There’s also a silver circuit breaker in location 37.
It’s a thermal circuit breaker that auto resets and
handles the big motor load power for your sunroof.
It hides under the fuse box cover and also provides
power to your windows. Since at least some of your
windows work, it’s probably passing power.

Another link in the chain on the way to that breaker is
accessory overload relay 2/60. These PDFs should help.
.
4B50089C-2F53-45C7-A148-DD572A6DA34A.png
B42F6329-D271-4BAC-A377-5E290E95F89C.png
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Mstrshkbrnnn
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Re: Sunroof stopped working

Post by Mstrshkbrnnn » Fri Aug 30, 2019 10:06 am

BEJinFbk wrote:
Thu Aug 29, 2019 3:27 pm
Do your dash lights work?


4B50089C-2F53-45C7-A148-DD572A6DA34A.png

B42F6329-D271-4BAC-A377-5E290E95F89C.png
No, they don't work. I'll double check that fuse when i get off work today.


'94 854 NA 287k (bought for $400)
'98 s70 GLT 243k (bought for $250 currently non running)
'96 854R 173K (bought for $900)

Mstrshkbrnnn
Posts: 32
Joined: Wed Jul 10, 2019 12:13 am
Year and Model: 94 850
Location: Seattle
Has thanked: 3 times
Been thanked: 1 time
United States of America
Mstrshkbrnnn

Re: Sunroof stopped working

Post by Mstrshkbrnnn » Fri Aug 30, 2019 10:32 am

BEJinFbk wrote:
Thu Aug 29, 2019 3:27 pm
Is anything connected to the accessory connector under
the dash, next to the steering column. If you have a hinky
stereo installation, anything’s possible.
What exactly do you mean by accessory connector? I'm not familiar with this part. I bought the car like three weeks ago now, but the previous owner had an aftermarket head unit installed, and the job looks like it was not done professionally, if that's what you mean.


'94 854 NA 287k (bought for $400)
'98 s70 GLT 243k (bought for $250 currently non running)
'96 854R 173K (bought for $900)

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