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Boost switch operation

Could someone tell me an easy to verify that the boost switch and system are operating correctly?
Thanks.
Jerry & Nanci
1999 U270 34'WTFI
2011 Malibu
A smart man knows what to say, a wise man knows when to say it.

Re: Boost switch operation

Reply #1 –
I will stick my neck out and try an answer. If you test the start battery voltage (from lugs on it) and record the volts, then turn on the coach battery charger then go back to the start ones and recheck the volts shown you should get an increase from the first reading, if the Boost switch is on. I gather it all depends on state of charge of start batteries but would think there would be a momentary rise even if they are full. This is  of course as long as connections are good and Isolator is ok.
The experts can correct this statement if incorrect,or, a better way to test!!
John H
Coachless, now use aircraft. 2003 Ford Travelair TC280 class C. Super shape. Just for 1 yr .
1994 Ford E350 ClassC,total renovation inside and out. Now sold.
2000 U295  36' Cummins 350 c/w Banks Stinger, Resonator upgrade,Solar, LED lites.Residential fridge with slide out pantry. Build 5674. Sold
ex 92 GV 022C ored Cummins. Sold
ex 95 GV240 cat 3116. Sold
2017 Mini cooper s & 2016 land Rover LR2 HSE  LUX.
jhaygarth@aol.com    SKP #130098
treat everyone as you would like to be.

Re: Boost switch operation

Reply #2 –
Quote from: Green99 –
Could someone tell me an easy to verify that the boost switch and system are operating correctly?
Thanks.

On shore power turn the ignition to "on" (but don't start the engine) and note the start battery voltage displayed on your instrument panel. Hit the boost switch and check it again after a few hours. If the voltage has gone up then the boost switch is working.

Craig
1993 U225 36' Unihome GV with PACBRAKE exhaust retarder, Banks Stinger and Solar Panels.
Toad: 1999 Jeep Wrangler 2-door soft-top.

"No one has ever had to evacuate a city because the solar panels broke."

Re: Boost switch operation

Reply #3 –
I Assume that by shore power I would get the same results with the generator running.  Am I correct?
Also I assume that I would turn the switch on to check voltage than turn the switch off leaving the gen running for an Hour?  then go back and check the voltage again?

Thanks again.
Jerry & Nanci
1999 U270 34'WTFI
2011 Malibu
A smart man knows what to say, a wise man knows when to say it.

Re: Boost switch operation

Reply #4 –
Quote from: Green99 –
I Assume that by shore power I would get the same results with the generator running.  Am I correct?
Also I assume that I would turn the switch on to check voltage than turn the switch off leaving the gen running for an Hour?  then go back and check the voltage again?

Thanks again.
Yes...I usually run the genset, after measuring the VDC at the start batteries and the coach batteries, turn the BOOST switch "on" and remeasure VDC at the start batteries with the genset running.  W/O the genset running, the start battery voltage should read between 12.2 & 12.8 VDC (no engine running either).  With genset running and no engine running, the start batteries should read the same as the coach batteries or approx. 13.8 to 14.1 VDC.

Hope this helps...This is what I do each time I start the coach after being in storage.  I disconnect all batteries while in storage.

Peter
Peter & Beth Martin
No Forrest? What have you done?
MC# 15890 until Dec 2016; FMCA #F329677
Cincinnati, OH