Coach Batts overcharging

[GARY MINKER]

Most shunts are ten millivolts (.1V) at rated current. The wiring to the meter is likely messed up or the meteris bad. Shunts are just calibrated shorts that actually have a use. gary 85pt40 --- On Mon, 11/22/10, freewill2008 wrote: From: freewill2008 Subject: [WanderlodgeForum] Re: Coach Batts overcharging To: WanderlodgeForum@yahoogroups.com Date: Monday, November 22, 2010, 12:47 PM 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 > > > >