This may have been covered previously but I can’t find the answer. I would like to install a battery isolating switch on my 2013 Plus 4. The battery is located near the rear axle and the switch will go on the rear bulkhead between the seats. The reason for the installation is partly for a crude security measure against theft and mostly to isolate the battery when working on the car.
My question concerns the lack of power to the alarm and to the ECU when the battery is isolated. Clearly the alarm wouldn’t work and the ECU may lose its “learnt” mode. Is it therefore sensible to bypass the switch with a flyer wire with a fuse of small capacity to retain some power to the alarm and ECU but any attempt to start the car would blow the fuse?
Any advise would be much appreciated.
Bob.
I have an isolator switch connected to my battery terminal, but my battery is under the bonnet so easily accessible. Not needed really from a security perspective as that's what the immobiliser is for. As others have said, the ecu relearn pretty quickly, and I haven't noticed a difference when mine has been switched off. I don't have a clock to be concerned about and not fussed about retuning radio stations in, as I just press the search button and up pops radio 2 straight away.
