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Cat C9 will not start

Yahoo Message Number: 104880
Tried to start our coach this morning. It tried to crank but quit very quickly. Our battery is only 1 month old. It is reading 12.7 volts with a multimeter. Using a boost from the house batteries does not help.
My question is should I have more than 12.7 V? This is a wet cell battery. Coach is in our driveway so I have time to figure it out.

Tom

2005 Inspire 51177

Re: Cat C9 will not start

Reply #1 –
Yahoo Message Number: 104881
Best advice.....Call "Batteries Plus". They make house calls. May be your inverter. You should be seeing 13.4 or better not 12.75.
D Jean
CC81072

Re: Cat C9 will not start

Reply #2 –
Yahoo Message Number: 104882
He didn't say if plugged but he is trying to start it.

If not plugged in 12.4-12.5 is fully charged.

Check ground connections at battery and engine.

Ray 
---

Re: Cat C9 will not start

Reply #3 –
Yahoo Message Number: 104884
Has it been plugged in to power? Your coach has one 8D battery so if you have a meter check the voltage, clean the + & - check the ground. If it is low then your echo charger may be bad, mine went out so I installed the Magnum Combiner works great. I also installed this in the power port up front so when I walk in I can see what my voltage is before I start.
Floyd 2006 Inspire 51744

Amazon.com: INNOVA 3721 Battery and Charging System Monitor: Automotive
As an Amazon Associate Country Coach Owners Forum earns from qualifying purchases.

Re: Cat C9 will not start

Reply #4 –
Yahoo Message Number: 104885
Yes to checking battery terminals and grounds. If that does not get it going, also check the power feeds to the starter it self, and clean if needed.

Agree that that reading, I assume an 'at rest' chassis battery, should give you ample power to crank your C9 awake.

If as you are checking things, you feel you have any question on the chassis is seeing a charge. Plug in, turn on your charger. Once your house batteries are in float mode, take a reading on the chassis battery. You should see a higher, maybe 13.1V + or - .4V, reading. That would confirm it is getting a charge...

Best of luck to you, and please let us know what you find out!

Smitty

04 Allure 31017
04 Allure Sold to a nice new owner! Now enjoying a 07 Magna Rembrandt 45' ISX600 #6775
"We're ONDROAD for THEJRNY!" (Toad and Coach license plates, say Hi if you see us!)

Re: Cat C9 will not start

Reply #5 –
Yahoo Message Number: 104889
Tom, 12.7 volts is very good for an at rest battery. I had this same problem the morning after replacing two 8D starters on my coach. Even the boost would not help. A thorough cleaning of the battery connections solved the problem.

Good luck

George in Birmingham
'03 Magna 6298
George in Birmingham
2003 Magna 6298

Re: Cat C9 will not start

Reply #6 –
Yahoo Message Number: 104892
Thanks to the group,

Although my terminals appeared to be clean, I took them apart recleaned and tighten the bolts. Engine fired right up.
Always, always, always check battery terminals first. I actually knew that, but didn't do it.

Tom

2005 Inspire
51177

Re: Cat C9 will not start

Reply #7 –
Yahoo Message Number: 104901
Tom

I would wonder why your boost switch did not get you started? My boost was wired incorrectly at the factory as I found out the hard way when the engine start battery went downhill.

Dan 2006 Allure 31348 C-9       
Dan

Re: Cat C9 will not start

Reply #8 –
Yahoo Message Number: 104921
I think it is normal that the boost won't help when chassis battery connections a bad. The boost will connect the house batt to the chassis batt using the same bad connection as the starter. The result is still a bad connection from the now boosted chassis batt.

George in Birmingham
'03 Magna 6298
George in Birmingham
2003 Magna 6298

Re: Cat C9 will not start

Reply #9 –
Yahoo Message Number: 104924
Poor battery connection (dirty terminals) can also lower voltage which can result in locking the Allison transmission in gear. Learned that the hard way, and am now very attentive to keeping terminals clean.

Michael
Inspire 360
51748
 

Re: Cat C9 will not start

Reply #10 –
Yahoo Message Number: 104928
Being relatively new to the CC world, I've found that 90% of my problems have been electrical. Keep those terminal ends, connections and battery posts clean and tight and your trips will be fun.

Jerry & Brenda Azzara
99 Intrigue Chef's Delite
#10702