Foretravel Owners' Forum

Foretravel Motorhome Forums => Foretravel Tech Talk => Topic started by: jayncat on May 04, 2014, 11:49:51 pm

Title: Battery Isolator Question
Post by: jayncat on May 04, 2014, 11:49:51 pm
I have a 97 U295. Wanting to install a Trik - L- Start (up to 5 amps) or it's big brother the Amp - L -Start (up to 15 amps) to keep starting batteries charged. My isolator is located in the very rear compartment driver's side, right next to engine.
Facing the isolator, there is one cable attached on the left post, one cable attached on the center post, and 4 cables attached on the right post.

Which one of these go to the house batteries, and which one goes to the chassis batteries?

Thanks for your help.
Title: Re: Battery Isolator Question
Post by: bbeane on May 05, 2014, 05:54:37 am
Mine is located under the bed on the drivers side of the coach, pass side terminal is starting batt, center is alternator in, drivers side is house batteries. One wire on each terminal. If had to guess the one with 4 cables is the engine side, most likely all those cables go varrious connections on the
engine side.
Title: Re: Battery Isolator Question
Post by: Dave Cobb on May 05, 2014, 09:28:35 am
The easy way to know is to test the voltage at the lugs on the isolator.  Start by testing your engine batteries voltage.  Then test the voltage at the isolator, the matching voltage will be the engine's and will the lower of the two voltages on the isolator.  The higher voltage on the isolator will be the house batteries being charged if you are plugged into shore power.
Title: Re: Battery Isolator Question
Post by: RRadio on May 05, 2014, 09:59:30 am
If that charger has a desulfator you should connect it directly to the battery terminals, not the isolator... just saying.
Title: Re: Battery Isolator Question
Post by: wa_desert_rat on May 05, 2014, 11:46:07 am
If that charger has a desulfator you should connect it directly to the battery terminals, not the isolator... just saying.
It doesn't have a desulfator. Those are very low-power chargers. In fact they won't actually "charge" any batteries similar to those we use in our RVs. The ones I'm familiar with say that the battery bank has to be fully charged before you connect the "maintainer". They simply replace power lost through internal resistances and parasitic loads (things you can't turn off that still use a little bit of power).

Craig