|
850 / S70 & V70 '96-'99 / C70 '97-'05 General Forum for the 850 and P80-platform 70-series models |
Information |
|
V70 Estate Rear screen demist..Views : 437 Replies : 4Users Viewing This Thread : |
|
Thread Tools | Display Modes |
Nov 17th, 2021, 23:00 | #1 |
V70 TDi CD
Last Online: Sep 28th, 2023 23:47
Join Date: Apr 2008
Location: FALMOUTH..CORNWALL
|
V70 Estate Rear screen demist..
Hi Guys, just wondering if any of you have had the rear screen - heated window fail on a V70 Estate.
My heated mirrors still seem to be working, but zilch demist at the rear screen. I've checked the continuity of the screen matrix and that seems ok, however the power I'm getting back there is about 11.5 volts. Surely this is wrong isn't it. Is there some sort of relay or resistor that could cause this. My fault I should have sorted it during the summer when it wasn't needed. As always.. any pointers in the right direction will be gratefully received.. Dave..
__________________
My old Turquoise 850 TDi GLT & my present Garnet Red V70 TDi CD My 1998 V70 TDi CD : http://www.volvoforums.org.uk/album.php?albumid=654 |
Nov 17th, 2021, 23:19 | #2 |
VOC Member since 1986
Last Online: Today 00:24
Join Date: Jan 2007
Location: Leicestershire
|
I don't know if this will be of any assistance, 'tdidave', but, before I bought it, my 2000 V70 apparently had a similar issue which also affected the RWW operation. There is a bill in the history file for repairing the wiring in the vicinity of the tailgate and evidence on the car bears testimony to the fact that work has indeed been done in that area. Could failed wiring possibly be at the root of your current problems?
Regards, John.
__________________
Time flies like an arrow, fruit flies like a banana ..... |
Nov 17th, 2021, 23:35 | #3 | |
V70 TDi CD
Last Online: Sep 28th, 2023 23:47
Join Date: Apr 2008
Location: FALMOUTH..CORNWALL
|
Quote:
Thanks John.. my first suspect area was the where the wiring loops from the body to the tailgate. I felt sure I'd find my problem there, but when I did do a bit of investigating the wiring supplying power to the tailgate inside the car was only delivering about 11 volts or there abouts, and this seems suspect to me. Maybe not enough to power the heated window. Dave..
__________________
My old Turquoise 850 TDi GLT & my present Garnet Red V70 TDi CD My 1998 V70 TDi CD : http://www.volvoforums.org.uk/album.php?albumid=654 |
|
Nov 18th, 2021, 15:53 | #4 |
Junior Member
Last Online: Aug 11th, 2023 19:23
Join Date: Oct 2013
Location: noway
|
can you measure resistance across the back window from the connector in the tailgate?
the same relay switches the mirrors and window heater but they are on different pins. you should get roughly battery voltage across the heating element
__________________
V70 2000 P80 old style, green and white. |
The Following User Says Thank You to pff For This Useful Post: |
Nov 25th, 2021, 12:21 | #5 | |
V70 TDi CD
Last Online: Sep 28th, 2023 23:47
Join Date: Apr 2008
Location: FALMOUTH..CORNWALL
|
Quote:
Thanks very much for that advice pff.. I've been otherwise pre-occupied the past few days, but when I get a free minute I'm going to chase this problem further including your recommendations.. Dave..
__________________
My old Turquoise 850 TDi GLT & my present Garnet Red V70 TDi CD My 1998 V70 TDi CD : http://www.volvoforums.org.uk/album.php?albumid=654 |
|
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
|
|