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09-30-2013, 08:28 AM
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#1
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Winnebago Owner
Join Date: Oct 2009
Location: Marathon, Florida
Posts: 222
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Solenoid question
The battery boost switch seems to have no affect and it also looks like the house batteries do not charge from the alternator. This sounds like the aux start solenoid? If so before I open up the panel in the electric bay is there a part number and/or can I get one that will work just as good from an auto parts store? Did a few searches here and I'm still a little confused.
I plan to tear into it anyway but any advance help is appreciated.
__________________
Mark & Nancy
2004 Winnebago Vectra 40KD
Shep dog, R.I.P. Kenzie dog Toad 2015 Jeep Wrangler Willys Wheeler
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09-30-2013, 10:12 AM
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#2
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Winnebago Master
Join Date: Dec 2005
Location: Buxton, North Dakota
Posts: 1,037
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Yes, you can get one from an auto parts store. just make sure it is continuous duty and preferably rated for 200 amps. There are three connector and 4 connector versions depending on whether or not there is a separate ground lug or if it is grounded through the solenoid frame.
__________________
2003 Winnebago Adventurer 38G F53/ V10 605 watts of Solar
1999 Winnebago Brave 35C Handicap Equipped
F53/V10
1999 Jeep Cherokee & 1991 Jeep Wrangler Renegade
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09-30-2013, 10:43 AM
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#3
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Winnebago Master
Join Date: Jun 2003
Location: Palisade CO
Posts: 895
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Trombetta makes the solenoid Winnebago uses. They have a much better series called the Bear series that is much more durable. When I replaced mine I bought one and then discovered I just didn't have the space for it - it is larger than the old one.
I had a heck of a time doing the replacement with the one that fits. It was very hard to get into the space and I could only use one hand at a time.
In any case a number of people have used a Bear replacement and I have not heard of any that have failed.
SEE HERE
Trombetta only sells through distributors. The one I used gave me very good service.
MurCal
41343 12th Street West
Palmdale, CA 93551
Phone:800-321-8386
Fax:661-947-7570
__________________
Clay WA5NMR - Ex Snowbird - 1 year, Ex Full timer for 11 years - 2004 Winnebago Sightseer 35N Workhorse chassis. Honda Accord toad.
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09-30-2013, 01:09 PM
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#4
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Winnebago Master
Join Date: Aug 2005
Location: Nashua, NH
Posts: 1,825
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Here's an old thread with a bunch of good info: Yet another solenoid bites the dust! . It's a bit long, but has pictures and is worth reading. I ended up replacing the solenoid with the silver contact version and adding some resistors in series to drop the activation voltage a bit--It's still happy today.
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Chris Beierl
2005 Winnebago Vectra 36RD
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09-30-2013, 01:10 PM
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#5
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Winnebago Owner
Join Date: Jan 2012
Location: Kentville, NS
Posts: 134
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You should be able to take the original one apart and clean the contacts inside. It will work like new again.
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Binnie, Wanda & Yasper (Labradoodle)
1999 Winnebago Chieftain 35U F53 Chassis V10
Towing 2014 Jeep Wrangler Sahara
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09-30-2013, 01:33 PM
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#6
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Winnebago Camper
Join Date: Jun 2011
Location: Amite, La.
Posts: 33
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Sometimes these soleniods Get stuck from not switching , it works sometimes to tap on top lightly to activate .
Hope this helps,
James
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09-30-2013, 02:05 PM
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#7
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Winnebago Master
Join Date: Dec 2009
Location: Out there, somewhere
Posts: 1,743
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Quote:
Originally Posted by HD4Mark
The battery boost switch seems to have no affect and it also looks like the house batteries do not charge from the alternator. This sounds like the aux start solenoid? If so before I open up the panel in the electric bay is there a part number and/or can I get one that will work just as good from an auto parts store? Did a few searches here and I'm still a little confused.
I plan to tear into it anyway but any advance help is appreciated.
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HD4Mark,
Well Sir, sometimes the battery boost solenoid is used for charging the house batteries from the alternator and sometimes it's not. Before I'd go tearing into anything, I'd confirm if yours does or not. And, from the ones I've seen and worked with, those solenoids are about 3 times the size of the ones you'll find in the average auto parts store. They carry a serious amount more amperage. You've been given some good answers but, some thorough investigation of the system is needed prior to just replacing parts as a guess.
Now, you didn't say what kind of rig, engine, chassis, etc. you have so, I'll have to surmise that it's the one in your avatar, correct? And, if it's the 40 KD model and, on a Freightliner Chassis, I'll also assume your solenoids for both battery disconnect and auxiliary start, are both inside the left rear, just behind the duals compartment, correct? I could be way off here, just guessing. I too would like to know the outcome of what you find is the problem since our rigs are somewhat close in design and equipped.
Scott
__________________
2004 ITASCA HORIZON 36GD, 2011 GMC Sierra 1500 4x4 Toad '08 GL 1800 Gold Wing
Retired-29.5 yrs, SDFD, Ham - KI6OND
Me, Karla and the Sophie character, (mini Schnauzer)
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09-30-2013, 03:22 PM
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#8
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Winnebago Master
Join Date: Aug 2005
Location: Nashua, NH
Posts: 1,825
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As described in the long thread I linked in above the basic problem is that the contactor that Trombetta sell to Winnebago is designed as a strictly 12 Volt continuous duty unit and when operated in a coach winds up with 13.8 to 14.4 volts across the coil the whole time the engine is running. This causes it to draw too much current and severely overheat.
Switching to the silver contact version of that contactor/solenoid and adding a couple of diodes or resisters in series with the activator power lead (which will reduce the voltage across the coil by a few volts) seems to solve the problem. Details are all in the above linked thread.
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Chris Beierl
2005 Winnebago Vectra 36RD
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10-01-2013, 05:48 AM
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#9
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Winnebago Owner
Join Date: Oct 2009
Location: Marathon, Florida
Posts: 222
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Thanks guys for some great info and lots to read up on. This will be my next project as I am in the middle of replacing the coolant temperature sender on our Onan Quiet Diesel 7500. Not an easy task I am finding.
I will bring this thread up as soon as I get going on it
__________________
Mark & Nancy
2004 Winnebago Vectra 40KD
Shep dog, R.I.P. Kenzie dog Toad 2015 Jeep Wrangler Willys Wheeler
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10-01-2013, 06:03 AM
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#10
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Winnebago Owner
Join Date: Oct 2012
Location: Land O Lakes, FL
Posts: 111
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Quote:
Originally Posted by HD4Mark
Thanks guys for some great info and lots to read up on. This will be my next project as I am in the middle of replacing the coolant temperature sender on our Onan Quiet Diesel 7500. Not an easy task I am finding.
I will bring this thread up as soon as I get going on it
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Except for a fuse, the only thing in the Boost circuit is the Isolator Solenoid and the switch. On some RVs, the same Solenoid is used to charge batteries thru a BIRD circuit.
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2005 Newmar Essex 4502, 2013 Caddy SRX
1997 HR Endeavor 37, CAT, 1996 Geo Tracker
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10-04-2013, 08:57 AM
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#11
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Winnebago Owner
Join Date: Jun 2007
Posts: 109
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Quote:
Originally Posted by cbeierl
As described in the long thread I linked in above the basic problem is that the contactor that Trombetta sell to Winnebago is designed as a strictly 12 Volt continuous duty unit and when operated in a coach winds up with 13.8 to 14.4 volts across the coil the whole time the engine is running. This causes it to draw too much current and severely overheat.
Switching to the silver contact version of that contactor/solenoid and adding a couple of diodes or resisters in series with the activator power lead (which will reduce the voltage across the coil by a few volts) seems to solve the problem. Details are all in the above linked thread.
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What he said!! Chris has been there, so have I. There is a wealth of info in the referenced thread.
As mentioned, it is not the contacts; it's the relay coil itself. Too much voltage.
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NoMoreAZ
2006 Itasca Horizon 40KD, 2004 Honda CR-V
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10-04-2013, 09:57 AM
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#12
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Winnebago Master
Join Date: Jun 2003
Location: Palisade CO
Posts: 895
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In my case the contacts failed, not the coil. I could hear it activate but the contacts didn't make.
__________________
Clay WA5NMR - Ex Snowbird - 1 year, Ex Full timer for 11 years - 2004 Winnebago Sightseer 35N Workhorse chassis. Honda Accord toad.
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