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Engine Discussion of preventative/corrective maintenance and other technical issues regarding your coach's engine.

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  #11  
Old 01-02-2012
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Transmission in neutral?
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  #12  
Old 01-02-2012
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First day back at work I'm beat. It's amazing how a little surgery and 2 months sitting on your Butt can get you out of the rythm of the job, Just looked at the posts I'll try a squezz it in between the last 2 months of stuff that's built up here in the shop,

"Transmission in neutral? " YES

"I attached the ignition switch schematic for my coach' I'm cross ref'n. with my drawings
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  #13  
Old 01-03-2012
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You might try disconnecting the battery cables for about 1 minute and then reconnecting. It will allow the ecm to do a reset and also reestablish the battery connections in case you have a faulty connection.

Of course, also check the ground.
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  #14  
Old 01-05-2012
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Got the new breakers yesterday. Too bad I did not look at them before leaving the parts house. They are the correct amperage, but the mounting tabs are roted around 90 degrees from the original set up, I do not want to reinvent the wheel. So back to the parts house for an exchange. Had to find a good parts man now a daze. I had the original to use as a model and still got the wrong breaker style.
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  #15  
Old 01-08-2012
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Update

I have checked the front ignition switch , It appears to be good and functional. There is 13.20 +or- volts to switch. Same for the rear ignition switch.

The three auto reset breakers also appear to be functional the have power to both studs and the engine compartment lights are working,they are connected to the 20 amp breaker in this set of three.

The voltage to chassis is good 13.25+or-

The large 75 amp relays up front K36 & 37 are good.

Just for the heck of it I replaced the 4 relays in the Grey box in the engine compartment.

A/T is on

Electronic Master is on.

I still have a dead dashboard and nothing to the motor, I don't hear any noises whatsoever when turning the ignition, completely dead.

All other system working. headlights, dash gages light up from dimmer, radio, etc

ANY IDEAS ????

I am not that good when it comes to electronics and electrical systems and I'm running out of stuff to check. If I'm correct and I'm under no illusion that I've covered everything could I be looking at a DDEC problem? That's just a guess and speculation on my part.

I do have a spare DDEC IV
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  #16  
Old 01-08-2012
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Kurt
I would think that if the DDEC was bad the engine would crank over, it just wouldn't start. Hopefully someone else will confirm that.
I would suspect the transmission interlock. It will not let the engine crank if it thinks the transmission is not in neutral. Do you get the low air warning buzzer when you turn the key? If you get the buzzer, and it just will not crank, then I would suspect the neutral interlock, maybe the transmission keypad.
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  #17  
Old 01-08-2012
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Quote:
Originally Posted by susanmarycamilleri View Post
Kurt
I would think that if the DDEC was bad the engine would crank over, it just wouldn't start. Hopefully someone else will confirm that.
I would suspect the transmission interlock. It will not let the engine crank if it thinks the transmission is not in neutral. Do you get the low air warning buzzer when you turn the key? If you get the buzzer, and it just will not crank, then I would suspect the neutral interlock, maybe the transmission keypad.
No low air buzzer. No buzzers for any systems.
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  #18  
Old 01-08-2012
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Hi Kurt,

You might try turning “off” the A/T switch to see if your symptoms change. If the symptoms don't change, you might have a problem with the 12 volt master solenoid that the A/T switch is supposed to pick up.
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  #19  
Old 01-08-2012
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Quote:
Originally Posted by Dieselbird01 View Post
Hi Kurt,

You might try turning “off” the A/T switch to see if your symptoms change. If the symptoms don't change, you might have a problem with the 12 volt master solenoid that the A/T switch is supposed to pick up.
Hi John,

I've tried that several times It seems to function properly. The systems shut down and start back up with the exception of all the buzzers, dash gage function and of course no engine start. Could it just effect those systems or would everything go out? Like I said I'm not an electrical engineer
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  #20  
Old 01-08-2012
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Kurt
I have tried to find the electrical diagram for your year on the forum and have been unable to find it. I am sure I read somewhere that you had posted all these. Do you know where they are?
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