DeweyClawson
Enon Valley, PA
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Joined: 09/22/2007
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I have a Winnebago Ultimate Advantage w/ the Cummins ISC. It won't start.
Turn the key and the lights on the dash come on but the starter does nothing. I can start it by jumping direct from the batt to the starter so I know the starter and then bendix are OK.
Is there a starter solenoid and if so does anyone know where it might be.????
There are 2 solenoids that look like starter solenoids located in the electronics bin forward of the left front wheel. Don't know what they do but I think one is the gen starter solenoid. I would have thought the starter solenoid would be in the back close to the batts and the eng.
The fool learns from his own mistakes.
It is the wise man who learns from the mistakes of others.
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rvrepairnut
bc
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Joined: 11/11/2011
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DeweyClawson wrote:I have a Winnebago Ultimate Advantage w/ the Cummins ISC. It won't start.
Turn the key and the lights on the dash come on but the starter does nothing. I can start it by jumping direct from the batt to the starter so I know the starter and then bendix are OK.
Is there a starter solenoid and if so does anyone know where it might be.????
There are 2 solenoids that look like starter solenoids located in the electronics bin forward of the left front wheel. Don't know what they do but I think one is the gen starter solenoid. I would have thought the starter solenoid would be in the back close to the batts and the eng.
The actuall starter solinoid is attached to the starter where u jumped the battery to.IF in fact u can run a jumper cable to the battery and then start by using ignition switch then for sure there must be a secondary relay somewhere.I personally always thought the battry cables went direct to the starter on a cummins set up
other than the disconnect switch but if that was off u would not have the dash liting up
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wolfe10
Texas
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Is the transmission shift pad illuminated when this happens?
Does the dash HVAC fan work?
Brett Wolfe
1993 Foretravel 36' U-240
Cat 3116, Allison 3060
FMCA Forum: www.community.fmca.com/index
Caterpillar RV Engine Owner's Club: www.catrvclub.org
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PyrateSilly
Home
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We had a similar problem. Ours were the battery connectors. They were loose and had gotten dirty. We replaced and made sure all connections were cleaned tighted down. Good to go.
Try the simple, cheap and easy things first, you may be surprised.
Thom, Gascap and Christine having fun in a 1993 Monaco Crown Royale 40ft 300hp RV.
Our blogged repairs and travels
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DeweyClawson
Enon Valley, PA
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wolfe10 wrote:Is the transmission shift pad illuminated when this happens?
Does the dash HVAC fan work? The shift pad does NOT light up. The fan works.
The batteries are about a year old, plugged into shore power with a Magnum inverter/100 amp 3 stage smart charger. 13.2V. Removed batts and checked all connections re-installed same and no diff. Tried to start with batt disconnect sw both on and off. no diff.
This PM I will crawl under it again and see if I can find starter solenoid. Someone told me that the Cummins ISC starter solenoid is part of the starter?????
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wolfe10
Texas
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I suggest you call Winnebago and troubleshoot with them, as they installed the wiring and set up the start inter-lock system.
#1 thing is to tell them that the Allison shift pad does not have power. I don't know how your dash HVAC fan is wired (powered). On most, the key must be on for the fan to function. So let me ask a slightly different question. Do all other functions that only work with the key in the on position work? If not, the IGNITION SOLENOID (not starter solenoid) or the ignition switch that turns the ignition solenoid on/off is suspect.
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bluwtr49
Green Valley, AZ
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This may not be applicable but I found on ours that there are several interlocks the prevent the engine from starting. One in paricular put me in a momentary panic was that if the slides are out the engine won't start.
Dick
2000 40" DP Beaver Patriot Thunder Cat C-12 425 HP, 1550 Tq
1997 Jeep GC Limited ---toad
2008 Toyota Tundra Crew Max Limited TRD (Retired)
2009 Cougar 268 RLS ~8700 lbs road wt (Retrired)
2006 Jeep Liberty Turbo Diesel.....TV in Training
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John339
Clyde Ca. USA
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My buddy's rv won't start if the slide outs are out.
The slide out behind the driver seat will not come in if the driver's seat is set back.
He has to slide the driver's seat forward and then bring in the slide and then he can start the engine.
John and Cindy and Misty Rain and Senor Paco(Chihuahuas)
1994 Coachmen Catalina 300 MB RD
in sunny Clyde, Calif. KE6IDM
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DeweyClawson
Enon Valley, PA
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wolfe10 wrote:I suggest you call Winnebago and troubleshoot with them, as they installed the wiring and set up the start inter-lock system.
#1 thing is to tell them that the Allison shift pad does not have power. I don't know how your dash HVAC fan is wired (powered). On most, the key must be on for the fan to function. So let me ask a slightly different question. Do all other functions that only work with the key in the on position work? If not, the IGNITION SOLENOID (not starter solenoid) or the ignition switch that turns the ignition solenoid on/off is suspect.
As far as I can tell, all other functions that work with the key, work. Winnebago referred me to Spartan. Spartan asked me if the key pad lit up. I only knew the answer because Brett asked. Apparently that means the transmission neutral signal is not being sent to the ecm preventing the start.
ie: blown 10 amp fuse. Spartan does not know where the fuse is located. They say it is in the back somewhere. I can't find it. Also there is a 10 amp ECM fuse in the same place. No joy.
I have run the engine with the slides out.
I'll let you know if/when I find it.
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wolfe10
Texas
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Actually I believe (confirm with Allison) if there are no lights on the Allison shift pad, it is not getting 12 VDC power-- there are TWO 12 VDC positive feeds to the Allison-- the one for memory that his hot all the time and the one that only has power when the ignition is on. It is this second one that you need to trace/check. Were the shift pad lit up, but not starting, then it could be a transmission neutral signal issue.
But, you can talk this through with the Allison techs: Allison help line 800 252 5283
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