The 75 and ZT Owners Club Forums - View Single Post - Voltage drop test for parasitic battery drain

Mike Noc · 18th March 2021, 07:44

As mentioned you can check the current drain without disturbing the various ECUs - Harry on here had a good method.

I followed French Mike's suggestion of using a second battery wired in parallel (with the Ammeter in series with the second battery) so that once the ECUs have gone to sleep the Ammeter can be switched on, the car battery terminal disconnected and the second battery would provide the power.

18th March 2021, 07:44	#10
Mike Noc This is my second home Rover 75 CDT Manual Connoisseur SE, Rover 75 CDT Automatic Connoisseur SE & a Freelander Td4. Join Date: Jul 2009 Location: Hampshire Posts: 11,550 Thanks: 3,470 Thanked 3,119 Times in 2,247 Posts	As mentioned you can check the current drain without disturbing the various ECUs - Harry on here had a good method. I followed French Mike's suggestion of using a second battery wired in parallel (with the Ammeter in series with the second battery) so that once the ECUs have gone to sleep the Ammeter can be switched on, the car battery terminal disconnected and the second battery would provide the power. Last edited by Mike Noc; 18th March 2021 at 07:50..