Ford Focus (1998 - 2004) - 1999 1.8 Query about use of rear heated screen

Honest John Back Room » Technical matters
What is life like with your car? Let us know and win £500 in John Lewis vouchers | No thanks
View Threaded
Mon 9 Feb 2009 17:36
1999 1.8 Query about use of rear heated screen - jp147
Just a quick question about whether having the rear heated screen switched on whilst the engine is off as you can do with this car (for 10-15 minutes) can do any harm to the battery or does it depend on whether the alternator is working as it should ?
Reply | Report as offensive | Link
Mon 9 Feb 2009 17:47
1999 1.8 Query about use of rear heated screen - rtj70
It will run your battery flat.
Reply | Report as offensive | Link
Mon 9 Feb 2009 20:05
1999 1.8 Query about use of rear heated screen - Altea Ego
My heated rear window only works with the engine running.
Reply | Report as offensive | Link
Mon 9 Feb 2009 20:30
1999 1.8 Query about use of rear heated screen - yorkiebar
"It will run your battery flat. "

Generally agree but with the provision of may instead of will!

Best not to use any high power item unless the engine is running.
Reply | Report as offensive | Link
Mon 9 Feb 2009 22:13
1999 1.8 Query about use of rear heated screen - bathtub tom
IIRC my old '98 Focus switched off the HRW after about ten minutes.
Reply | Report as offensive | Link

Our honest used car pricing is a little bit different to all the others. You can get to our values through make or model - you don’t have to follow a prescribed route. Plus, it’s live, which means we can react to changes in the market quicker than any printed price guide.

Honest Used Car Prices

From which small car to buy at which price point to the best UK-built cars, our Top 10s have the lot. Click now for your shortlist.

Unsure of what to buy? Our Top 10s are here to help you....