Car alarm keeps going off~~

EaglEye · 18th June 2021, 14:03

Hi All~~

Am in need of bit of help..
My Rover 75 sounds the alarm when the car is locked, but nothing's hit it.. I don't think it's because of low battery, as I keep it topped up.

I was wondering if the T4 might be able to shed some light on why it's happening??

If so, is anyone with a T4 free this weekend as I'm going away next weekend, and I don't want to have to leave it unlocked~~
😣😖😣😖

Am based in the South East but willing to travel within reason~

Thank you in advance!!

steve-45 · 18th June 2021, 14:29

If you lock it with the key it should not activate the alarm function

stevestrat · 18th June 2021, 14:35

Quote:

Originally Posted by steve-45

If you lock it with the key it should not activate the alarm function

Alarm still functions for bonnet, boot and doors.

From the driver's manual:
With the key:
1. Insert the key and turn the door lock towards the rear of
the car:
• all doors locked (not superlocked)
• perimetric alarm activated (protects the doors, bonnet and boot)
• NO INTERIOR SPACE PROTECTION

EaglEye · 18th June 2021, 14:50

I've heard it might be because of the Bonnet switch~~
So am going to replace it and see what happens~~

RollandSmoke · 18th June 2021, 14:59

Quote:

Originally Posted by EaglEye

I've heard it might be because of the Bonnet switch~~
So am going to replace it and see what happens~~

Had the same issue with mine and removing the bonnet switch cured it but I haven't replaced it as yet. I would try just disconnecting it first, see if that works, before removing anything.

trikey · 18th June 2021, 19:25

You can always disconnect the horn (inside the plenum near the pollen filter) until you find the cause.

Ian G · 18th June 2021, 19:52

As some have said most likely culprit is damp or corrosion in the bonnet switch
Had it on redfive. Just a clean sorted it.
Cheers Ian

Dallas · 18th June 2021, 20:16

As above, water may have gotten into the bonnet switch with all the rain we had last night.

Otherwise it could be water ingress into the EWS unit, its above the accelerator pedal behind the kick panel next to the sunroof drain hole, that's if you have a sunroof.

MarkS · 19th June 2021, 20:01

Doesn't the instrument panel indicate the source of the alarm, when the car is unlocked ?

It could be phantom wiper operation. That will activate the alarm.

dave lincs · 20th June 2021, 16:48

Unplug the bonnet switch and see if that's cures it

18th June 2021, 14:03	#1
EaglEye Newbie Rover 75 Saloon Join Date: Feb 2021 Location: Wokingham Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	Car alarm keeps going off~~ Hi All~~ Am in need of bit of help.. My Rover 75 sounds the alarm when the car is locked, but nothing's hit it.. I don't think it's because of low battery, as I keep it topped up. I was wondering if the T4 might be able to shed some light on why it's happening?? If so, is anyone with a T4 free this weekend as I'm going away next weekend, and I don't want to have to leave it unlocked~~ 😣😖😣😖 Am based in the South East but willing to travel within reason~ Thank you in advance!!

18th June 2021, 19:25	#6
trikey Premium Trader Rover 75 Join Date: Nov 2010 Location: Devon Posts: 33,767 Thanks: 8,837 Thanked 14,831 Times in 8,030 Posts	You can always disconnect the horn (inside the plenum near the pollen filter) until you find the cause. __________________ Lest we forget..

18th June 2021, 14:29	#2
steve-45 This is my second home Rover 75 Saloon CDTi Join Date: Oct 2015 Location: Belvedere Posts: 4,076 Thanks: 108 Thanked 1,089 Times in 774 Posts	If you lock it with the key it should not activate the alarm function

18th June 2021, 14:50	#4
EaglEye Newbie Rover 75 Saloon Join Date: Feb 2021 Location: Wokingham Posts: 4 Thanks: 0 Thanked 0 Times in 0 Posts	I've heard it might be because of the Bonnet switch~~ So am going to replace it and see what happens~~

18th June 2021, 19:52	#7
Ian G This is my second home Small Join Date: Feb 2010 Location: Land of the Eel Posts: 6,315 Thanks: 2,328 Thanked 2,991 Times in 1,431 Posts	As some have said most likely culprit is damp or corrosion in the bonnet switch Had it on redfive. Just a clean sorted it. Cheers Ian

18th June 2021, 20:16	#8
Dallas This is my second home 1979 Capri 1.6L, 1982 Capri 1.6L, 2016 Dacia Stepway Join Date: Jun 2009 Location: Dorset Posts: 8,595 Thanks: 3,496 Thanked 3,397 Times in 2,218 Posts	As above, water may have gotten into the bonnet switch with all the rain we had last night. Otherwise it could be water ingress into the EWS unit, its above the accelerator pedal behind the kick panel next to the sunroof drain hole, that's if you have a sunroof.

19th June 2021, 20:01	#9
MarkS Gets stuck in Rover 75 Diesel Tourer, called Perseverance Join Date: Nov 2011 Location: Bournemouth Posts: 664 Thanks: 189 Thanked 157 Times in 108 Posts	Doesn't the instrument panel indicate the source of the alarm, when the car is unlocked ? It could be phantom wiper operation. That will activate the alarm.

20th June 2021, 16:48	#10
dave lincs Posted a thing or two Rover 75 Saloon Join Date: Mar 2014 Location: Louth Posts: 1,413 Thanks: 380 Thanked 986 Times in 476 Posts	Unplug the bonnet switch and see if that's cures it