Got call from mechanic - said there are a ton of codes coming up - alternator is ok but the new battery purchased 10 months ago is bad - he also said altnator is putting out 15.8 which is probably what fried battery - he thinks its definately the computer but is fearful that all the modules are going to be shot now too - now we are talking a big ticket repair - do I repair it and take the risk this problem is fixed or just get rid of it. He also said the jeep started fine the next morning - yet it died the night before and had to be towed......still looking for advise on the matter
mine pushed 15+ for about a year and a half (and stupid me thought it was normal because they are AGMs which like 15.3 charge rate). fortunately I had a dual battery so the overcharge was absorbed some across two rather than one (I think that and being AGM is what saved me). We changed the alt - same - reflashed the computer and it has been at 14.2 max (usually around 13.5 but will go to 14.2 for a short time after a heavy draw like winch) for a year and a half now. And I don't know your tech from Adam - but as many guys I have seen just take out the old battery and connect the new - without cleaning the metal ring and lug to a shiny surface - make SURE he is not just "checking" them (looks tight feels tight must be good) but actually servicing (take them apart and CLEAN them with a wire brush) - both lugs and terminals.
A bad ground can cause the alternator to think the battery is not charged (well because it ISN"T - its semi insulated from BEING a bad ground) and thus run max amps/voltage. The computer then is exposed to the excess voltage.
J Wm Bishop EA, ASADE
The wagon should, of course, be as light as possible, but strength should not be sacrificed to lightness, for on any but the regularly traveled roads, the wagon will get many a
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