Member Since: 12 Jul 2007
Location: North East Scotland
Posts: 87
Retrofit front windscreen heating?
Hi,
Due to bad flying stone damage which would mean MOT failure, yesterday I had the windscreen replaced on my base model, 7 seater, Disco 3 by Autoglass in Aberdeen. Despite telling them at the time of booking that it was the base model, I returned to the car and found that they had fitted the windscreen that has the heater elements in it.
So I was thinking was there any easy way to get this working. I do not know whether they wired it in. I assume that the circuitry/connectors are already in the loom, but where? What else is needed other than the dashboard switch? Is this something to even think about undertaking?
Any advice gratefully received as usual.
Cheers,
Rob2005 TDV6 base model 7-seater manual
16th Dec 2009 5:35 pm
PaulP
Member Since: 04 May 2007
Location: Barcelona
Posts: 4317
I had the a-pillar trim (right hand side on my LHD D3) off the other day (the one that covers the front row curtain airbags) and spotted two single-pole insulated spade connectors.....
I guess these are what is needed to physically connect the heated screen (can't think of anything else they would be used for)...
Can't help much with the rest to be honest, but I guess you'd need a new HVAC unit with the front heated screen button on it though....
Cheers,
Paul2006 Discovery 3 TDV6 SE AutoBuckingham Blue 2007 Golf GT DSG
16th Dec 2009 6:00 pm
tanters
Member Since: 24 Oct 2007
Location: Oireland
Posts: 4286
Rob, give Wex a pm, I think he had it done.A happy childhood ... is the worst possible preparation for life.
You now have two choises:
1 - get a timer relay and wiring everything none OEM
2 - The connectors are in the A-pillars, even on the basic spec, chances are the Autoglass biys already plugged them in. Now all you need is a HVAC unit with a heated windscreen button. These are expensive new, but hunt around breakers/ebay etc and you should be able to pick one up. I got a HSE one with Heated screen and Heated Seats button as well as the climate control dual-zone adjusters for £25 when I did ours some 3-4 years ago.LRs are a fond memory, apart from the maintenance.
16th Dec 2009 6:13 pm
wiggs
Member Since: 03 Sep 2006
Location: Manchester
Posts: 14372
And dont forget the 2 fues needed ...space already there for them ..if not already in placeG4 Gone ...but not forgotten
Can't remember the Fuse numbers, but they are in the Battery Fuse box and there's two of them 30Amp eachLRs are a fond memory, apart from the maintenance.
17th Dec 2009 7:47 am
Rob H
Member Since: 12 Jul 2007
Location: North East Scotland
Posts: 87
I looked into doing this mod on my 54 plate base spec last year but found that some of the wiring in the battery JB was not present. Yes, the thick wires to the screen connecters were there, but some of the feeds from the CJB to BJB missing unfortunately. Tricky to add them as they need to pass through the bulkhead, so I didn't bother.Previously:
2005 D3 2.7 TDV6 S
1984 90 2.25 Petrol CSW
1992 90 200TDi Hard Top
1995 Discovery ES 300TDi
2003 90 TD5 Truck Cab
17th Dec 2009 3:02 pm
absolut-land
Member Since: 13 Sep 2010
Location: savoie
Posts: 45
I'm agree with you, some of the wiring in the battery JB was not present. There are not the wires :
-1- between the two mini fuses (30A) and the screen connecters left and right (passenger side for an RHD) I found the plug.
-2- the wire between the hevac unit and the relay (electric diagram).
behind the hevac unit there is an Brown wire. If I put an voltmeter into this Brown wire en the negative terminal I have 0.5V I switch on the windscreen If I swith off I have 0V. Could you confirm me it is the good Brown wire.
Could you tell me too where is the connect to the Battery Junction box. The central Junction box there too many wires I'm lost.
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