Make sure you label the switch for your wife. I've gotten 2 really nasty calls from my wife when she has taken the truck and couldn't get it started to drive home.
I use mine as a poor mans power boost. Making a left at a light or accelerating uphill, merging etc... I turn off the field wires (and A/C if its running). I have a small solar panel on the dash so on the way to the airport I turn off the alternator and then recharge the battery while truck sits at the airport for a couple of days.
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