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Old 11-02-2017, 11:38 AM   #1
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Charging House Batteries while driving.

I have a 2003 Holiday Rambler 34PDT Vacationer on a Ford chassis.
My alternator quit charging the house batteries on my way from Vernon, BC to Yuma AZ. Could anyone tell me where I can find the solenoid or the relay that connects the alternator to the house batteries.
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Old 11-02-2017, 11:44 AM   #2
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Hi ! Welcome to IRV2! We're sure glad you joined the gang!

Sorry I can't answer your question but wanted to say hello! Keep her between the ditches!

Good luck, happy trails, and God bless!
Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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Old 11-02-2017, 12:57 PM   #3
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Where to find on the coach, or where to buy a replacement?

Until you can get a replacement, you can jumper across the big terminals on the solenoid. Just disconnect the jumper cable after you park at our destination, so that you don't accidentally discharge the chassis battery.

You can also achieve the same thing by putting a battery jumper cable between the positive posts on house and chassis batteries, thus temporarily wiring them in parallel.
Gary Brinck
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC
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Old 11-02-2017, 02:10 PM   #4
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I would expect it to be in the Front Distribution Panel, the back box inside the compartment under the driver's left foot, accessed from outside the coach. I can't say for sure on your 2003. I downloaded your coach's owner's manual (link here), and it didn't give a drawing of the FDP. Some of the manuals do.

Here's a link to a photo of where it is on our HR's FDP. Trace the blue wires up and to the left and you'll end at the BIRD (Bi-directional Isolator Relay Delay) module, which controls the automatic activation features of the solenoid. The AUX BOOST or BATT BOOST switch on the dash controls the solenoid manually. You could have a faulty solenoid, BIRD or switch. Each of these is easy enough to test. In my case, when I bought the coach the BIRD module was broken. I replaced it. I've also bought a spare BIRD, and a spare solenoid.
2008 Holiday Rambler Admiral 30PDD (Ford F-53 chassis)
2009 Honda Fit Sport
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Old 11-02-2017, 05:48 PM   #5
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house batteries not charging while driving

Thank you everyone for your responses, very much appreciated. I have not been able to find the solenoid anywhere. There appears to be one mounted on the passenger side against the radiator. Only a mouse would have access. However, below the distribution panel mounted on the firewall is another row of relays (inside a black box. One of the relays (left hand side facing the box) did not test right. I inserted a different one, and voila, we have power going to the house batteries.
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Old 11-02-2017, 07:14 PM   #6
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Have someone hit the boost switch on and off, while you listen for it clunking.

It should be near the batteries, to minimize the cable lengths.

The boost switch is also the charging solenoid your looking for.
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batteries, charging, house batteries

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