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Your mechanic was most likely monitoring the current draw from the battery with an ammeter. Do you know what the reading was on the meter?
 

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Holy cow! Are you sure the mechanic is on the level! :roll: I hope he/she didn't disconnect the battery while the engine was running or attempt to start the engine with the ammeter connected in series with the battery cable! Never ever disconnect the battery with the engine running as that can cause some real havoc with the electrical system and electronics. Check for excessive current draw with everything Off and doors closed, doors locked, etc.. Disconnect the negative (-) terminal on the battery and connect an ammeter in series between the negative cable and the negative battery terminal and see how much load is being placed on the battery. .5 amps (500 milliamps) sounds a bit on the high side to me. Maybe 200-300 milliamps at most.
:D
 
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