Heated rear screen

john adam · 30th June 2024, 01:40

Hello, the heated rear screen on our 2.5 v6 has decided to stop working. The switch lights up but nothing at the screen.
What is the most likely cause? Looking at the wiring diagram there seems to me a number of fuses associated with the screen. If it is a fuse which one could it be.
All other systems work fine.
Look forward to the ever useful feedback, thanks.

SD1too · 30th June 2024, 07:37

Hello John,

For a 1999 car, fuse link 7 (40 amps) in the engine compartment fusebox feeds the HRW relay and elements.

Ensure that your battery is fully charged since the manual says that certain equipment can be disabled if it is not. As the HRW is a very high current consumer, it's a probable candidate.

Simon

john adam · 30th June 2024, 23:13

Thanks Simon, if that link is the problem are they available? Will check when the rain stops!
Our car is a late 2005 model, does that make a difference?

SD1too · 1st July 2024, 07:50

Quote:

Originally Posted by john adam

Our car is a late 2005 model, does that make a difference?

Ahh, thank you for that important information. Your profile mentions only a 1999 model.

Do you have both or have you sold the earlier car? I did see the list of five cars in your signature but it's unclear whether you currently own all of them or it's a historic list of past vehicles.

Anyway, there are major fuse box differences between 1999 and 2005 cars but in this particular case it's still fuse link 7 for the HRW element. However I'll be very surprised if it's blown and you'll be able to tell visually.

Beware that this part of the circuit is permanently live so if removing anything, disconnect the battery first (after waiting for the sat. nav. disc drive to shut down first).

You might also check for a poor connection at the screen.

Simon

john adam · 1st July 2024, 09:39

Simon I hate to admit that I still have all those cars. Thanks for your very useful comments.
If it is not the fuse then perhaps it could be the filter adjacent to the rear screen.

SD1too · 1st July 2024, 10:27

Well it's a very desirable collection of Rovers, particularly the P5B coupé.

Your best fault-finding tools are curiosity, observation and a multimeter to trace the 12v supply.

Simon

30th June 2024, 01:40	#1
john adam Avid contributor 1999 Rover 75 2.5 Connoisseur saloon Join Date: May 2007 Location: Carterton, NZ Posts: 109 Thanks: 18 Thanked 3 Times in 3 Posts	Heated rear screen Hello, the heated rear screen on our 2.5 v6 has decided to stop working. The switch lights up but nothing at the screen. What is the most likely cause? Looking at the wiring diagram there seems to me a number of fuses associated with the screen. If it is a fuse which one could it be. All other systems work fine. Look forward to the ever useful feedback, thanks. __________________ 1999 Rover 75 Connoisseur 2005 Rover 75 Connoisseur SE 1970 Rover 2000TC 1973 Rover P5B Coupe 1962 Rover P4 - 100

30th June 2024, 07:37	#2
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,673 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Hello John, For a 1999 car, fuse link 7 (40 amps) in the engine compartment fusebox feeds the HRW relay and elements. Ensure that your battery is fully charged since the manual says that certain equipment can be disabled if it is not. As the HRW is a very high current consumer, it's a probable candidate. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

30th June 2024, 23:13	#3
john adam Avid contributor 1999 Rover 75 2.5 Connoisseur saloon Join Date: May 2007 Location: Carterton, NZ Posts: 109 Thanks: 18 Thanked 3 Times in 3 Posts	Thanks Simon, if that link is the problem are they available? Will check when the rain stops! Our car is a late 2005 model, does that make a difference? __________________ 1999 Rover 75 Connoisseur 2005 Rover 75 Connoisseur SE 1970 Rover 2000TC 1973 Rover P5B Coupe 1962 Rover P4 - 100

1st July 2024, 09:39	#5
john adam Avid contributor 1999 Rover 75 2.5 Connoisseur saloon Join Date: May 2007 Location: Carterton, NZ Posts: 109 Thanks: 18 Thanked 3 Times in 3 Posts	Simon I hate to admit that I still have all those cars. Thanks for your very useful comments. If it is not the fuse then perhaps it could be the filter adjacent to the rear screen. __________________ 1999 Rover 75 Connoisseur 2005 Rover 75 Connoisseur SE 1970 Rover 2000TC 1973 Rover P5B Coupe 1962 Rover P4 - 100

1st July 2024, 10:27	#6
SD1too Doesn't do things by halves Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007 Location: Former Middlesex Posts: 20,673 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	Well it's a very desirable collection of Rovers, particularly the P5B coupé. Your best fault-finding tools are curiosity, observation and a multimeter to trace the 12v supply. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.