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strange electrical issue

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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njsg
Posts: 12
Joined: 22 December 2011
Year and Model: 1999 v70
Location: northern nj

strange electrical issue

Post by njsg »

Hello all, and thank you in advance for any replies:

I just purchased a 1999 v70. Its a great car. 163k miles on it, but in great shape. Has a new (2 week old) radiator and heater core, plus many other things have been repaired on it through its life. But there seems to be one issue that seems to have survived all the repairs and investigations:

The rear window wiper, does not work, and when one unlocks all the doors, the rear hatch does not unlock, it needs to be done manually with the key, and I am pretty sure the rear defroster doesn't work either. So its obvious that there is an electrical glitch somewhere going to the rear area of the vehicle. I don't mind this, as I can deal if it is not repairable, but it sure would be nice if I could get these things to a state of functionality, for convenience's sake. Is there a wiring panel somewhere in the rear of the car? The previous owner said nothing to me about it being a fuse, he did mention that fuse #6 sometimes blows (the fuse that controls the door locks), and that I would have to change it if I wanted all the locks to lock and unlock simultaneously, but he said that he was never able to figure out why the rear hatch area had problems. Any suggestions are welcome, and thanks again. :mrgreen:
-Sarah Grace

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BEJinFbk
Posts: 4067
Joined: 5 January 2008
Year and Model: '98 V70 R
Location: Fairbanks, Alaska
Has thanked: 93 times
Been thanked: 146 times

Post by BEJinFbk »

The first thing to check would be the wiring harness that runs through the hinge.
I suspect that you have several broken wires in that area due to tailgate movement.
'98 V70 R - Well Equipped for Life Up North... ;)

njsg
Posts: 12
Joined: 22 December 2011
Year and Model: 1999 v70
Location: northern nj

Post by njsg »

Thank you. How do I access that? Do I remove the panel on the inside of the hatch?
-Sarah Grace

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User avatar
BEJinFbk
Posts: 4067
Joined: 5 January 2008
Year and Model: '98 V70 R
Location: Fairbanks, Alaska
Has thanked: 93 times
Been thanked: 146 times

Post by BEJinFbk »

MVS provides wiring diagrams for many Volvos that include system wiring diagrams,
component locations, and harness routing charts that will show you where to look.
https://www.matthewsvolvosite.com/volvo-wiring-diagrams
Here's a direct link to yours:
https://www.matthewsvolvosite.com/downlo ... ersion.pdf
'98 V70 R - Well Equipped for Life Up North... ;)

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