Suzanne Posted February 26, 2016 Share Posted February 26, 2016 I have an 06 RX 400H. I bought the truck in 2011 and since then have purchased 2 batteries for it. I do use the auto light feature and I have auto start could these two things be draining my battery while the car is off? Or could it be the smaller battery that needs replacing? Quote Link to comment Share on other sites More sharing options...
zieke Posted February 26, 2016 Share Posted February 26, 2016 Suzanne, I would hazard a guess that there is and has been a grounding problem w/ your vehicle. I think 2 batteries in 5 yrs. is one too many, so it is probably time to take it to a good mechanic to find the problem. Good luck! Quote Link to comment Share on other sites More sharing options...
RX400h Posted February 27, 2016 Share Posted February 27, 2016 The auto headlight feature should NOT drain the battery. If you are referring to "Remote start", then there is a chance that it was wired incorrectly. An auto electric shop should be able to isolate the problem, quickly. Quote Link to comment Share on other sites More sharing options...
sadclown Posted March 4, 2016 Share Posted March 4, 2016 It is possible that you just need your battery leads and connectors cleaned and tightened. Quote Link to comment Share on other sites More sharing options...
jamesm182 Posted March 4, 2016 Share Posted March 4, 2016 Definitely worth getting the battery tested anyway though as you never know! Quote Link to comment Share on other sites More sharing options...
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