Before removing the battery.

KLM · 23rd February 2019, 12:16

Before disconnecting the battery my handbook refers me to disarm the alarm.
How is this done.

Is there a switch somewhere ?
Sorry for the dumb ass question.

Kev.

Dorset Bob · 23rd February 2019, 14:22

I have removed my battery loads of times without disarming the alarm.
In fact, taking the battery out automatically disarms it.

I would imagine it would only be an issue if the car has a battery backup alarm sounder, which was an optional extra.

suzublu · 23rd February 2019, 14:40

Funny this should crop up, just put my battery back on after a month or so on trickle charge

Never touched the alarm or anything

Yorkshire GOC · 23rd February 2019, 15:40

Quote:

Originally Posted by Dorset Bob

I have removed my battery loads of times without disarming the alarm.
In fact, taking the battery out automatically disarms it.

I would imagine it would only be an issue if the car has a battery backup alarm sounder, which was an optional extra.

Same here

bl52krz · 23rd February 2019, 15:53

All That it means is that do not take the battery off/ disconnect with the alarm set.i.e activated. No secret switches or anything else involved.

chris75 · 23rd February 2019, 15:54

I suspect that just opening your car with the fob , rather than unlocking with the key , disables the alarm

This is as opposed to someone stealing your battery , who will probably not have a fob !

T-Cut · 23rd February 2019, 17:57

The Handbook is ambiguous IMO. It makes no reference to the which version of the alarm system may be fitted and makes no comment on how to do it. Indeed, how could you access the bonnet release lever without the alarm being off?

TC

p2roverman · 23rd February 2019, 19:45

I sometimes find the alarm sounds when I refit a battery to an otherwise dead 75. A quick turn on/off of the ignition silences it.
But to answer the question, you can remover the battery without upsetting any of the electronics, in my experience.

KLM · 23rd February 2019, 20:10

Quote:

Originally Posted by T-Cut

The Handbook is ambiguous IMO. It makes no reference to the which version of the alarm system may be fitted and makes no comment on how to do it. Indeed, how could you access the bonnet release lever without the alarm being off?
TC

OK, this is how I messed up.

I opened up my car using my key FOB, unlocked the bonnet, removed the battery cover, checked batt charge level and decided to give the batt an overnight charge.
Disconnected the poss terminal from the batt and connected the charger for a 24 hr plus low rate charge leaving the battery in situ.
Half closed the bonnet on the charger, covered the car over with the car cover and plugged in to my outside power source.
Next day lifted the half closed bonnet, shut off elec power supply and removed the charger. As soon as I reconnected the + terminal to the battery
The horn blew the fear of God out of me.

Then it stopped.
Referred to the handbook.

_
and read "disarm the alarm before removing the battery".
Still not sure why I got a blast off the horn.

P.S. should I have disconnected the neg terminal too.
Kev.

slovcan · 23rd February 2019, 20:35

Quote:

Originally Posted by KLM

OK, this is how I messed up.

I opened up my car using my key FOB, unlocked the bonnet, removed the battery cover, checked batt charge level and decided to give the batt an overnight charge.
Disconnected the poss terminal from the batt and connected the charger for a 24 hr plus low rate charge leaving the battery in situ.
Half closed the bonnet on the charger, covered the car over with the car cover and plugged in to my outside power source.
Next day lifted the half closed bonnet, shut off elec power supply and removed the charger. As soon as I reconnected the + terminal to the battery
The horn blew the fear of God out of me.

Then it stopped.
Referred to the handbook.

_
and read "disarm the alarm before removing the battery".
Still not sure why I got a blast off the horn.

P.S. should I have disconnected the neg terminal too.
Kev.

The negative should always be the first disconnected and last re-connected. To disconnect the battery and still leave it in the car, just disconnect the negative terminal and make sure it can't accidentally touch the negative battery post while it is off.

I said always, but positive ground (earth) systems are opposite. Not many of those or 6 volt left, though.

Cheers,
Glenn

23rd February 2019, 12:16	#1
KLM Posted a thing or two Rover 75 Club CDT Join Date: Oct 2008 Location: North West Posts: 1,289 Thanks: 691 Thanked 394 Times in 240 Posts	Before removing the battery. Before disconnecting the battery my handbook refers me to disarm the alarm. How is this done. Is there a switch somewhere ? Sorry for the dumb ass question. Kev.

23rd February 2019, 14:22	#2
Dorset Bob Senior Citizen Rover 75 2.5 Connoisseur SE,Chrysler 300C,124 Spider, Daytona 955i,Honda XL250 & Royal Enfield 650GT Join Date: Feb 2008 Location: The Kingdom of Wessex Posts: 6,976 Thanks: 2,391 Thanked 2,685 Times in 1,686 Posts	I have removed my battery loads of times without disarming the alarm. In fact, taking the battery out automatically disarms it. I would imagine it would only be an issue if the car has a battery backup alarm sounder, which was an optional extra. __________________ Let the good times roll............

23rd February 2019, 15:53	#5
bl52krz This is my second home Rover 75 cdt club + Rover 2.5 KV6 Conni SE Join Date: May 2008 Location: Birmingham Posts: 11,387 Thanks: 6,587 Thanked 2,262 Times in 1,729 Posts	All That it means is that do not take the battery off/ disconnect with the alarm set.i.e activated. No secret switches or anything else involved. __________________ Great Barr, Birmingham.

23rd February 2019, 15:54	#6
chris75 same car since 2005 2001 Rover 75 2.0 v6 Connoisseur Saloon Join Date: Nov 2006 Location: Ellesmere Port , Cheshire Posts: 3,811 Thanks: 379 Thanked 549 Times in 466 Posts	I suspect that just opening your car with the fob , rather than unlocking with the key , disables the alarm This is as opposed to someone stealing your battery , who will probably not have a fob ! __________________ Who said it was simples ?

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23rd February 2019, 14:40	#3
suzublu This is my second home rover 75 1.8 vvc club se wedgwood blue Join Date: Aug 2009 Location: Seaton Carew Posts: 26,911 Thanks: 65 Thanked 7,142 Times in 4,642 Posts	Funny this should crop up, just put my battery back on after a month or so on trickle charge Never touched the alarm or anything

23rd February 2019, 17:57	#7
T-Cut This is my second home Rover75 and Mreg Corsa. Join Date: Nov 2006 Location: Sumweer onat mote o'dust (Sagin) Posts: 21,751 Thanks: 341 Thanked 3,660 Times in 2,924 Posts	The Handbook is ambiguous IMO. It makes no reference to the which version of the alarm system may be fitted and makes no comment on how to do it. Indeed, how could you access the bonnet release lever without the alarm being off? TC

23rd February 2019, 19:45	#8
p2roverman Gets stuck in Rover 75 Connie Tourer & Connie SE Saloon & Club SE Tourer Join Date: Sep 2014 Location: Leeds Posts: 974 Thanks: 199 Thanked 71 Times in 59 Posts	I sometimes find the alarm sounds when I refit a battery to an otherwise dead 75. A quick turn on/off of the ignition silences it. But to answer the question, you can remover the battery without upsetting any of the electronics, in my experience.