exactly what it sounds like, if i put on the front heated screen, my revs drop for a second then car idles fine again. is this based off some pulley i didnt know about or has some electrics somewhere gone wrong?

The front screen heater draws a very big electrical load, the fall in RPM is because the alternator suddenly has to provide this and causes a significant drag on the engine that takes a little time to respond.
It’s perfectly normal

fair enough nothings bust then ive gotta get the rear spoiler off and see why the rear one isnt working next.

mgrover wrote:

exactly what it sounds like, if i put on the front heated screen, my revs drop for a second then car idles fine again. is this based off some pulley i didnt know about or has some electrics somewhere gone wrong?

Begs the question as to why you're putting on the screen heating in this weather?  2010 TDV8 - current - my first RRS, loving it so far......
2005 Cayenne S - handling defied physics and what a sound, so sod the mpg!
1995 Disco TDI- surprisingly reliable, shame about the peeling dash & other trim
Lots of other non 4X4's in between times.........

I was just messing around curious :p

The heated windscreen draws 27.5A each side, so 55A in total.  2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

hmm from what ive noticed in the past the driver side seems not to work as well as the passenger so i wonder if its a seperate fuse which is knackered?

It’s probably wishful thinking.

To find out locate in windscreen connectors either side.

And then measure the voltage each side with it on.
Connector tabs are inside under A pillar
Compare left and right.

It’s probably a knackered screen though

Yeah my screen was the same only half worked well

Don't forget that the side airbag pack lives on the A-pillar behind the trim so just be a bit careful when accessing it all. Be really annoying to set that off!  2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

RRSTDV8 wrote:

The heated windscreen draws 27.5A each side, so 55A in total.

idi - info available in the workshop manual that is freely available to download. Took me 2 minutes to open the manual and check the wiring diagram.  2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Do you guys ever think might be handy to just have a massive faq post :p I feel bad spamming a million and one things everyday thats gone wrong :p today's is hesitation to drop down gears when putting foot down but not using kickdown

I think that would be a very long index of questions with no answers, taking into account not everybody can be bothered posting a reply when they get the issue fixed to maybe help others with the same or similar issue. I think it would be quicker to keep asking you questions.

Cheers
Col

There is a “Search” function on the tool bar below the forum banner so no need for an FAQ section 2020 Pangea Green 1st Edition D240 New Defender 110 is here and loving it
2018 Melting Silver Mini Countryman PHEV - soon to be replaced
2015MY Corris Grey SDv6 HSE Dynamic, the best car I have ever owned, totally reliable only a cou0le of rattles in 3 years, now no longer in my care
Also in my garage is a 1996 TDi300 Defender 90 County HT made into a fake CSW