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V70 1999 sunroof, windows, mirrows electrical problem Topic is solved

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LH707DE
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V70 1999 sunroof, windows, mirrows electrical problem

Post by LH707DE » Mon Oct 21, 2019 10:52 am

Hi everyone,
I got a problem with my lovely 1999 V70 2.5.

About 10 to 15 seconds after turning the ignition on, all my electrical
windows, the sunroof and the electrical mirrow adjustment do not work any
more.
When I lock the car from outside and re-open it after about one minute,
all the parts named above work normal for about 10-15 seconds before they
quit again.
Can anyone please help me with some ideas, a wiring diagram or does
anyone have experienced such a problem before?

Best regards Heiko



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abscate
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Re: V70 1999 sunroof, windows, mirrows electrical problem

Post by abscate » Mon Oct 21, 2019 8:04 pm

The heavy current drawing windows and roof have circuit breakers in the fuse box. They are small silver rectangular boxes. See if they are clicking when the stuff stops working
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LH707DE


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Re: V70 1999 sunroof, windows, mirrows electrical problem

Post by BEJinFbk » Tue Oct 22, 2019 12:34 am

As pointed out above, those all share an automatically resetting, thermally
tripped circuit breaker. ( Volvo calls it an Automatic Fuse. You'll need to remove
the four torx screws on the top of the fuse box cover near the windshield to remove
it and access the circuit breakers and relays in that particular fuse box.
You're looking for 11C37 ( Fuse box "C", position 37 - "Automatic Fuse").

When there's problem, it will cycle on and off as it heats up and cools down.
The highest point of failure in that group is the power window master switch.
Its very likely that you need a new master switch.
98 S-V 70 Power window diagram.pdf
00 S-V 70 Power Windows Components.pdf
98 S-V70 Fuse Locations and Legends.pdf
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LH707DE


'98 V70 R - Well Equipped for Life Up North... ;)

LH707DE
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Re: V70 1999 sunroof, windows, mirrows electrical problem

Post by LH707DE » Wed Oct 23, 2019 5:13 am

Thanks for your fast answer!
I think an overload is not the cause of the problem. All, the windows, the sunroof and the mirrors do not work after 10-15 seconds, without operating them at the same time.
But I´ll have a look at the thermally breaker.
I'm looking for a component, which has influence on all three functions...
Can you be so kind and send me the schematics for the sun roof and the mirrors too?

Many thank's
Heiko



LH707DE
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LH707DE

Re: V70 1999 sunroof, windows, mirrows electrical problem  Topic is solved

Post by LH707DE » Wed Oct 23, 2019 9:30 am

Hi again,
I'm just back from the garage and... everything works fine!!!
The thermal breaker tripped short after I turned the key.
After I removed and reinstalled the breaker, it would not trip anymore. But I got a strong electrical smell from the back and found one of the aft window control switches stuck in the up position...
So the problem ist fixed :-)

Thank you very much for your help!!!
best regards
Heiko



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