Join Date: Jun 2010
Location: Pac NW
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DO NOT DISCONNECT 12V!!!!!!!!!!!!!!!!!!!
Please. yes, you will see posts "had it done many times". Also, you will see few that had MAJOR headache after they disconnected 12V. It is powering all crucial electronics in the vehicle and I counted 17 or more computers in my Camry Hybrid. It is your car, your call - but I am highly opposed to 12V diconnect and, when I did mine replacement, had back up 12V connected.
Your call. Not worth money, on my books.
Yes, you should be able to turn key into position II, or Aux. III is Start system. I clal it System, as Start does not necessarily turn engine on.
Look, trickle charger is literally few bucks. Clean battery terminals - with back up power, small 12V and alligator clamps will do fine - grease them with dielectric grease and connect all back solid. Place trickle charger on and do your best to drive her as often as you can. At least, pout on jackstands, so tires do not develop flat spots. Always remember, the ONLY way you can charge 12V is either trickle charger, or running ICE=charging hybrid battery=charging 12V. When hybrid battery runs critical low, it will stop charging 12V=dead 12V=non responsive vehicle at start up.