Coach Batts overcharging

[Ron Thompson]

A shunt is necessary because the sensitive meter movement could not handle the full current flow from the current source. If you have a full scale meter movement then two things could be happening. Either the shunt has been compromised somehow or your power source has suddenly increased in output or your regulator is malfunctioning. It should be fairly easy to determine where the problem is. It is doubful that the shunt is bad unless it is a resistor of low power rating. If it is a metal shunt then most likely it is ok. JUst a thought. My own opinion after listening to the banter going back and forth that your 'Regulator is malfunctioning. Ron Thompson -Waller, Tx. 1995 WLWB 42' (cockyfox@...) --- On Mon, 11/22/10, freewill2008 wrote: From: freewill2008 Subject: [WanderlodgeForum] Re: Coach Batts overcharging To: WanderlodgeForum@yahoogroups.com Date: Monday, November 22, 2010, 11:47 AM Gary - That is exactly what I would think, but I have a bum shunt that gives bad readings at the meter and does not pass current reliably. Hard to visually inspect this one and I have not removed it to find out. Possibly there has been physical damage at one of the end terminals. For now it is bypassed. Agree 300% about the meter! Bob Griesel '84 FC31 WLII --- In WanderlodgeForum@yahoogroups.com, GARY MINKER wrote: > > The likelyhood of a milled copper and brass shunt failing are near a negative number unless you run 300% current through it and melt the solder joints. The wire crimps, and hardware are more likely problems. If you need to measure DC in a line or branch, get one of these less than $100 DC clamp on ammeters. They tell you the current and the direction of flow. Don't leave home without one. > gary > 85pt40 > > --- On Sat, 11/20/10, freewill2008 wrote: > > From: freewill2008 > Subject: [WanderlodgeForum] Re: Coach Batts overcharging > To: WanderlodgeForum@yahoogroups.com > Date: Saturday, November 20, 2010, 1:14 PM > > > > > > > >  > > > > > > > > > > Fred - In that case the instruments could be giving you a faulty reading. The ammeter uses a shunt which could have failed. That might lead to a faulty voltage reading as well. > > > > Another possiblity is a relay (solenoid) failure that is causing the charging system to max out, although I would expect that to show up on both house and engine systems. This leads to the controls mentioned in the other reply, so that is a good place to start. In any case check the shunt on that house ammeter so you know the reading is accurate. > > > > Good luck with it. > > > > Bob Griesel '84 FC31 WLII WA > > > > --- In WanderlodgeForum@yahoogroups.com, "Fred Hulse" wrote: > > > > > > Hi Bob > > > I have only one 300 amp alternator and have tested the regulator with another it's ok > > > Thanks. > > > Fred & Jeanne Hulse > > > Morristown,Arizona > > > 97 WLWB41 > > > >