wipers and alarm going off by themselves

macafee2 · 18th February 2024, 10:14

The windscreen wipers have started up and the car alarm has gone off on my 2005 CDT.
I have checked the plenum and that is fine.
For now I have disconnected the battery. The car has not moved for a week or two but there was heavy rain last night.

Any pointers on where to look please?

thanks

macafee2

SD1too · 18th February 2024, 11:28

The BCU is common to both Ian.

Simon

macafee2 · 18th February 2024, 13:12

Quote:

Originally Posted by SD1too

The BCU is common to both Ian.

Simon

Thanks Simon, I hope I don't have to strip this much down to get to it
https://www.the75andztclub.co.uk/for...d.php?t=291790

and I sure as heck could not programme
https://www.the75andztclub.co.uk/for...d.php?t=244447

How will I know before I change it, if the BCU is the problem? Will a T4 session tell me?

macafee2

Rick-sta · 18th February 2024, 13:26

Do you have the highline sat nav with the drives in the boot? If so check they are not wet. Had this on one of mine before where the drives were wet and the wipers wouldn't turn off and the car wouldn't lock/unlock.

macafee2 · 18th February 2024, 15:21

Quote:

Originally Posted by Rick-sta

Do you have the highline sat nav with the drives in the boot? If so check they are not wet. Had this on one of mine before where the drives were wet and the wipers wouldn't turn off and the car wouldn't lock/unlock.

Hi Rick, no, no sat nav.

macafee2

Briodyjl01 · 18th February 2024, 16:44

Check that water hasn’t got into the door wiring plugs. I had it on one of mine and it was setting the wipers off randomly

macafee2 · 18th February 2024, 17:05

Quote:

Originally Posted by Briodyjl01

Check that water hasn’t got into the door wiring plugs. I had it on one of mine and it was setting the wipers off randomly

thank you

macafee2

SD1too · 18th February 2024, 17:31

Quote:

Originally Posted by macafee2

How will I know before I change it, if the BCU is the problem? Will a T4 session tell me?

Hi Ian,

What I was getting at (in an oblique way) is that it could be a K-bus problem.

Simon

sworks · 18th February 2024, 17:56

When I had this happen it was the bonnet switch. I’d driven down the M6 in torrential rain and this started about 2 hours after parking up.

macafee2 · 19th February 2024, 10:57

Quote:

Originally Posted by SD1too

Hi Ian,

What I was getting at (in an oblique way) is that it could be a K-bus problem.

Simon

Hi Simon,
I have no idea what K-bus is.

macafee2

18th February 2024, 10:14	#1
macafee2 This is my second home Rover 75 Saloon & Tourer Join Date: Sep 2012 Location: Lincoln Posts: 14,928 Thanks: 1,630 Thanked 3,032 Times in 2,181 Posts	wipers and alarm going off by themselves The windscreen wipers have started up and the car alarm has gone off on my 2005 CDT. I have checked the plenum and that is fine. For now I have disconnected the battery. The car has not moved for a week or two but there was heavy rain last night. Any pointers on where to look please? thanks macafee2

18th February 2024, 11:28	#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: 20,380 Thanks: 1,587 Thanked 3,749 Times in 3,181 Posts	The BCU is common to both Ian. Simon __________________ "Whatever is rightly done, however humble, is noble." Sir Henry Royce.

18th February 2024, 13:26	#4
Rick-sta This is my second home MG ZT 2.0 CDTI+ in Typhoon, MG TF 135 in Typhoon & Rover 75 Connoisseur CDTI SE in Pearl Black Join Date: Oct 2012 Location: Norfolk Posts: 7,534 Thanks: 2,718 Thanked 2,827 Times in 1,462 Posts	Do you have the highline sat nav with the drives in the boot? If so check they are not wet. Had this on one of mine before where the drives were wet and the wipers wouldn't turn off and the car wouldn't lock/unlock. __________________ How to retrofit Cruise Control on a diesel with no OEM wiring in place: Link How to retrofit heated electric memory seats with no OEM wiring in place: Link How to operate FBH and ATC via text Link How to restore cloudy projector headlights Link

18th February 2024, 16:44	#6
Briodyjl01 Gets stuck in Rover 75 Tourer, Rover 75 Saloon Join Date: May 2018 Location: Castleford Posts: 974 Thanks: 237 Thanked 185 Times in 113 Posts	Check that water hasn’t got into the door wiring plugs. I had it on one of mine and it was setting the wipers off randomly __________________ Too many Rovers to count ……

18th February 2024, 17:56	#9
sworks Been absent for a while… Rover 75 Tourer, Classic mini Cooper S, Abarth 595 competizione, MG TF and a Hyundai Tucson PHEV Join Date: Feb 2007 Location: Cumbria Posts: 13,065 Thanks: 1,033 Thanked 1,686 Times in 1,040 Posts	When I had this happen it was the bonnet switch. I’d driven down the M6 in torrential rain and this started about 2 hours after parking up. __________________ ................................................. 'Marmite' Possibly one of the most famous 75 tourers produced! left the production line as the last of only Three Rover 75 tourers produced in Trophy Yellow. 48 hours later Longbridge closed. The last sold ordered 75 Tourer. Paid for by the Phoenix Four and handed over by John Towers to the Warwickshire Northampton Air ambulance service as a Rapid Response vehicle