Jon61 Posted December 7, 2016 Report Share Posted December 7, 2016 1 hour ago, IanM said: Where do you mean "upstream" is it not a case of hardwiring to the battery terminals and plugging your Ctek into the lead? If you have a 981 you may be interested to download the '981 Service Information Technik Introduction document' (see post #3 of mine above in this thread, and the linked thread for where to find the download) - Section 9 in that document describes how the battery sensing works (and a lot more about the complex systems on the more recent cars). Link to comment Share on other sites More sharing options...
IanM Posted December 12, 2016 Report Share Posted December 12, 2016 On 07/12/2016 at 9:51 PM, jollop said: By upstream I mean on the car side of the counter, not the battery side. The electronics are normally in the battery negative lead, just beside the battery negative clamp. If you connect directly to the battery terminals and your car has one of these systems then the charge won't be counted. Best to connect the charger negative lead to a nearby metal point on the car body. Thanks for your advice Link to comment Share on other sites More sharing options...
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