Chassis Electrical Gremlin

[LakeBob]

I've been experiencing an intermittent issue and now its a fulll time issue.  Most of the systems controlled by the switch panel by the door are not working. In addition, my dash video screen and radio are in this same circuit and not working.

Seems to me I've read something about this in my many hours of reading posts on this and other forums.   I believe these systems are all on the chassis battery system? I've searched the wiring diagrams for hours and I've been unable to locate any fuses or relays for this circuit. 

I focused on the porch light circuit, as it operates by switch and door operation.  

I bypassed the solenoid in the rear run box, thinking this may have been the issue.  

Any help is greatly appreciated.  Would really like to get my porch light operational during this trip. 

 

Thanks!!!

 

 

and know 

[myrontruex]

I suspect the solenoid in the rear run box is not the right one. Look for a large one below the driver in the outside compartment.

Post a picture of the one in the rear. 

I am not familiar with your yr and model. 

[Frank McElroy]

You have a chassis multiplex coach.  Look at the attached wiring diagrams and make sure all the connections between expansion switch models are good along the daisy chain from the master module.

 

 

38080796_A Eaton Sw Wiring.pdf 38090529 Eaton Switches Ca.pdf

[LakeBob]

20 hours ago, Frank McElroy said:

You have a chassis multiplex coach.  Look at the attached wiring diagrams and make sure all the connections between expansion switch models are good along the daisy chain from the master module.

 

 

38080796_A Eaton Sw Wiring.pdf 132.33 kB · 2 downloads 38090529 Eaton Switches Ca.pdf 127.64 kB · 0 downloads

Thanks Frank. Can you please clarify what you mean my "expansion switch models"?

I'm having trouble finding the master module for this circuit. 

Thanks!!

20 hours ago, myrontruex said:

I suspect the solenoid in the rear run box is not the right one. Look for a large one below the driver in the outside compartment.

Post a picture of the one in the rear. 

I am not familiar with your yr and model. 

Thanks Myron.  My coach only has one solenoid in the rear run box (aside from the BigBoy) , no solenoids in the front run box. 

 

[Frank McElroy]

Bob, open the Two PDF files I posted and then blow them up so you can see the names on the switch modules.  You have two daisy chains.  Each one starts with a master module.  Then the other modules called expansion modules connect one after another via a data cable.  These are all identified in those two files.  The names on your switches will match the wiring schematics I posted.

All the switch modules send a digital signal along the multiplex data lines back to the CCM module in the FRB (front run bay).