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Battery Boost Not Working
01-31-2011, 09:54 AM
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#1
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Member
Workhorse Chassis Owner
Join Date: Dec 2006
Location: Arizona
Posts: 76
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Went out to start RV, no luck, battery was dead. Tried to use the battery boost, pushed it in and turned the key nothing. House batteries where charged so I don't think that was a problem. Is there a fuse that I can check, or something else? I put a battery charger on the battery and RV started.
I have a Trail-lite 34' class A 2006.
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01-31-2011, 10:29 AM
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#2
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Senior Member
Tiffin Owners Club
Join Date: Jan 2009
Location: Orange Beach, AL
Posts: 723
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Have you tried the Boost feature since you recharged the battery, remember it takes some battery power to activate the Boost.
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Battery boost switch
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01-31-2011, 10:48 AM
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#3
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Junior Member
Winnebago Owners Club
Join Date: Aug 2004
Location: Wichita,KS
Posts: 26
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Cati, I had trouble with my switch and discovered that one of the leads had come off fo the switch. Scuffy
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01-31-2011, 10:03 PM
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#4
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iRV2 Marketing
Winnebago Owners Club Workhorse Chassis Owner Coastal Campers Carolina Campers
Join Date: Jan 2000
Location: Conway, SC
Posts: 20,567
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Quote:
Originally Posted by Cacti
Went out to start RV, no luck, battery was dead. Tried to use the battery boost, pushed it in and turned the key nothing. House batteries where charged so I don't think that was a problem. Is there a fuse that I can check, or something else? I put a battery charger on the battery and RV started. I have a Trail-lite 34' class A 2006.
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I had a bad solenoid that when replaced, it restored the operation of the battery boost circuit. 
__________________
03 Adventurer 38G, Workhorse W22
F&R Track Bars, Safety+ , Ultrapower, Allison UP Grade Brake, S&B CAI, Taylor Extremes, SGII-X Gauge
TST 507, Blue Ox, SMI, Koni FSD, CrossFire
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02-01-2011, 09:02 AM
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#5
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Senior Member
Workhorse Chassis Owner
Join Date: Jun 2003
Location: Full Timer - Sioux Falls, SD
Posts: 1,935
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The boost solenoid is activated by the house batteries but if the chassis battery was completely discharged it might have been necessary to keep the switch pressed a minute or so as mentioned above.
It is easy to check the solenoid. While plugged into shore power measure the chassis battery voltage and then remeasure it while the AUX switch is pressed.
You should see an increase from 12.6 (if the chassis battery is fully charged and the engine hasn't been running for a day or more) to about 13.2 to 13.8 volts.
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Clay WA5NMR - Fulltiming- 2004 Winnebago Sightseer 35N Workhorse chassis. Honda Accord toad.
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02-01-2011, 09:09 AM
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#6
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Senior Member
Join Date: Feb 2011
Location: Oregon
Posts: 141
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The emergency start feature energizes the battery isolator enabling the chassis/coach batteries to connect. If your using a solenoid isolator they tend to get stuck as they age - sometimes a quick rap on the solenoid will resolve the issue.
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02-01-2011, 10:06 AM
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#7
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iRV2 Marketing
Winnebago Owners Club Workhorse Chassis Owner Coastal Campers Carolina Campers
Join Date: Jan 2000
Location: Conway, SC
Posts: 20,567
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Quote:
Originally Posted by ksg5000
... sometimes a quick rap on the solenoid will resolve the issue ...
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So what you're saying is sometimes you do need a BIGGER hammer! 
__________________
03 Adventurer 38G, Workhorse W22
F&R Track Bars, Safety+ , Ultrapower, Allison UP Grade Brake, S&B CAI, Taylor Extremes, SGII-X Gauge
TST 507, Blue Ox, SMI, Koni FSD, CrossFire
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Battery Boost Not Working
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02-01-2011, 12:59 PM
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#8
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Member
Workhorse Chassis Owner
Join Date: Dec 2006
Location: Arizona
Posts: 76
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Thanks for all the helpful replys. I think I'll go with the bigger hammer!!!!!
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02-26-2011, 01:27 PM
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#9
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Senior Member
Workhorse Chassis Owner
Join Date: Oct 2010
Location: Tehachapi, Ca
Posts: 469
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See my post on Newmar forum, Quick fixes & Mods, re BiRD. Just went through this problem, several issues.
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PKMesser
2005 KSCA 3778 on 04 W22
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02-26-2011, 07:35 PM
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#10
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Senior Member
Workhorse Chassis Owner
Join Date: Feb 2003
Location: Everywhere,USA
Posts: 1,037
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Full-Timers
in a
2003 Rexhall Aerbus 3550BSL
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02-26-2011, 09:34 PM
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#11
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Senior Member
Join Date: Oct 2010
Posts: 628
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There is a fuse for the boost switch. On our coach the antenna booster shares the fuse with the battery boost switch. If the fuse is ok it could be your solenoid between battery banks. Most likely your alternator is not charging your house batteries while driving down the road if your booster is not working.
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2008 Holiday Rambler Vacationer 340 Cummins
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02-27-2011, 09:16 AM
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#12
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iRV2 Marketing
Winnebago Owners Club Workhorse Chassis Owner Coastal Campers Carolina Campers
Join Date: Jan 2000
Location: Conway, SC
Posts: 20,567
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Quote:
Originally Posted by Full-Timers
Big Hammer!
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Thank FT! A picture is worth a thousand words.
__________________
03 Adventurer 38G, Workhorse W22
F&R Track Bars, Safety+ , Ultrapower, Allison UP Grade Brake, S&B CAI, Taylor Extremes, SGII-X Gauge
TST 507, Blue Ox, SMI, Koni FSD, CrossFire
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02-27-2011, 09:22 AM
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#13
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Senior Member
Fleetwood Owners Club Ford Super Duty Owner
Join Date: Feb 2011
Location: Mexifornia
Posts: 718
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Quote:
Originally Posted by DriVer
Thank FT! A picture is worth a thousand words.
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Or to Quote Stacey David from the Gearz show on cable tv.
It's time to use the "BFH"!
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Remember "Without Trucker's......America Stops" Buy American Made Only.
Why do we have to press 1 to speak English in America.
"Semper Fi"
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02-27-2011, 09:54 AM
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#14
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Senior Member
Join Date: Nov 2005
Location: Home location, Matlock, WA
Posts: 196
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Quote:
Originally Posted by Cacti
Went out to start RV, no luck, battery was dead. Tried to use the battery boost, pushed it in and turned the key nothing. House batteries where charged so I don't think that was a problem. Is there a fuse that I can check, or something else? I put a battery charger on the battery and RV started.
I have a Trail-lite 34' class A 2006.
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Yes, there is a fuse on my MH. It is 3 amp and is located behind the black relay that is located to the left of center on the circuit board that controls the houshold circuits. Yours may be different.
Bob, wa7hra
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2003 Dolphin 5342, W-22 Chassis, 22.5" Tires w/a spare, Monroe Shocks. Ultrapower ECM Upgrade.
2004 Toyota RAV4 toad, 2wd, 5 speed. US Gear toad brake.
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