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Bulb failure warning light on at start up goes off when brake pressed

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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marwood82
Posts: 10
Joined: 15 November 2016
Year and Model: 1997 V70
Location: germany

Re: Bulb failure warning light on at start up goes off when brake pressed

Post by marwood82 »

erikv11 wrote: 30 Mar 2017, 00:45 Guten tag!

Get a voltmeter in series on the positive cable, then start pulling fuses one by one - have you tried that yet?
yup. many times and with different meters. what i cannot figure out is that the current draw is well within limits.

to cause the kind of drain im seeing (a drop of around 0.2 - 0.25V per day) i'd need a current draw of around 30-50 times what the meter is reading.

marwood82
Posts: 10
Joined: 15 November 2016
Year and Model: 1997 V70
Location: germany

Post by marwood82 »

ive also tried a new battery, unplugging things inside etc

the only thing ive got is if pull fuse 7 from the main box it stops.
and fuse 7 powers the secondary box.

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abscate
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Post by abscate »

So now you head to the secondary box and repeat, leaving fuse 7 in place
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misha
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Post by misha »

Does the car have aftermarket alarm system?
'97 850 2.5 20v / fully equipped / Motronic 4.4 from the factory / upgraded with S,V,C,XC70 instrument cluster / polar white wagon
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

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