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Starting issue

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Brian Miller:
Gentleman,  I’m trying to track down a start issue. Replaced starter a few months ago an we seemed to be good to go. Tried to head out on the
road and we got a no start situation again.
Pulled the solenoid in the battery bay checked continuity…. checked ok.
Pulled starter to bench test solenoid /starter. All checked ok. 
I can jump starter….
Any thoughts or ideas would be greatly appreciated.

Brian
2000 Beaver Patriot

David T. Richelderfer:
My only guess is from my experience.  If the transmission keypad is not reporting neutral with an "N" on the keypad, then the engine will not be allowed to start.  The transmission MUST report a neutral status to the engine brain before the starter will engage.  In my case, the problem was a blown fuse in the black clamshell box found just under the keypad.  There are two fuses in that box.

Joel Ashley:
I’m not familiar with your particular era of rig, but on at least some models like mine there is a “Ford” solenoid in the “electric” bay, streetside foremost and beneath the driver, that commonly carbons up resulting in immobilizing resistance.  It routes 12v via circuit breakers to basic chassis devices like you’d find on any highway vehicle.  If you have a 2000 Patriot legend for that bay or can find one in BAC’s Coach Assist, you could test all related circuits with the ignition key on and off.  Though less common, keyed ignitions can overheat or otherwise fail as well.

Joel

Example legend:

Eric Maclean Co-Admin:
Brian
The start signal from the ignition switch runs to the service bay where it is switched for front or rear start control that switch is known to have connection problems as it is exposed to road dirt and water at the rear of the service bay wall.
Or you wouldn't be the first one to leave that switch in the rear position causing a no crank condition at the key switch.
The start signal starts at the ignition switch ( these are older Chevrolet truck ignitions) and are known to develop intermittent problems at both the switch and the plug it plugs into .
It then goes to the Allison automatic transmission VIM box where it is controlled by a relay for neutral safety before it goes on to the rear of the coach
( it is to be noted that there are two 10 amp fuses inside the VIM module) without an N on the shift pad the neutral safety relay won't allow signal out to starter.
From the VIM module the start signal goes through a bulkhead connector ( large round connector ) located in or behind the front electrical bay cabinet below the drivers station ( that bay will collect water causing corrosion if there are any leaks in the front cap windshield area. ) check that connection as well for green connectors
From there the start signal travels to the rear service bay as explained above to the front rear selector switch ( known to go bad )
From the front rear selector switch it then goes to the primary solenoid mounted in the rear of the battery bay which controls the large solenoid on the starter.


The closest we can come to the right wiring diagram for a 2000 ( starter wiring ) Patriot is the 1996 Patriot wiring diagram  page 18 will show you the wiring diagram for the start signal.

Hope this helps
Eric

Fred Brooks:
   Brian,
  Here is a picture of the hidden "starter solenoid" which is behind the battery box out of normal view. It is really a "trigger solenoid that activates the true starter solenoid mounted on the starter itself. Fred

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