Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 12, 2025 ...

Battery/Boost?

June 17, 2017, 12:20:40 pm

Went to change coach batteries removed them and noticed that inverter still was on. Thought boost solenoid was closed checked switch it was off. Check continuity at solenoid open/none any thoughts. Have chassis battery voltage at coach battery terminals. Could it be isolator?  Many Thanks Joey G

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Re: Battery/Boost?

Reply #1 – June 17, 2017, 01:02:06 pm

 
Does sound like shorted diode in isolator

Jim

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Re: Battery/Boost?

Reply #2 – June 17, 2017, 01:12:20 pm

Remove your start battery cable from the isolater lug and if it changes, you have your answer.

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Re: Battery/Boost?

Reply #3 – June 17, 2017, 04:39:20 pm

Bad isolator any tips on replacement.

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Re: Battery/Boost?

Reply #4 – June 17, 2017, 04:44:25 pm

yes, search "isolator" and you will learn a lot.
JohnH

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Re: Battery/Boost?

Reply #5 – June 17, 2017, 04:56:17 pm

I would look to get exactly the same. After all, it's lasted 21 years.

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Reply #6 – June 17, 2017, 05:13:41 pm

Would like the same one anyone know brand or at least amps.

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Re: Battery/Boost?

Reply #7 – June 17, 2017, 05:15:50 pm

It would be helpful if you could snap a photo of your old isolator and post it.  Then your question will be quickly answered.

Photos below of the original 190A 4-post isolator in our '93 U280.  Knowing Foretravel, yours is probably different.

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Re: Battery/Boost?

Reply #8 – June 17, 2017, 06:14:06 pm

Cant get to coach right now. Looks same except 3 terminals.

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Re: Battery/Boost?

Reply #9 – June 17, 2017, 07:26:24 pm

Look online at O'rielly's site and punch in 200 amp - 3 posts. They have them as does everyone, or will bring it in next day for you.
JohnH

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