Posted by dhermesc on November 06, 2017 at 08:10:22 from (24.248.193.103):
Son's 1996 F150 drained the battery in a couple hours on Thursday. We put a trickle charger on it Thursday night and the battery hadn't charged enough overnight to start on Friday morning. After I removed the charger the battery would only make the starter grind a couple times, then the battery was completely dead within 20 minutes (interior lights wouldn't even come on).
I removed the battery and charged it on the bench overnight on the same trickle charger. The next morning I had it load tested to make sure it wasn't shorted out internally - it was fine and tested above its rating. Brought it home and installed it - there was spark jumping from the post to the cable (way to much draw) - hooked it up and the trucked started and ran. Surprisingly when I removed the cable the truck kept running - I thought it needed the battery to run even with a working alternator.
To track down the draw do you set the multimeter on "amps" and hook it between the battery and cable and check the draw (I am assuming about 3 amps right now) and start pulling fuses to see which circuit is causing the excessive current draw?
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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