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Old 06-07-2024, 06:05 PM   #1
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Seneca 37RB Controller Location?

Where is the control unit that the Vega touch and phone communicate with located?
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Old 06-07-2024, 06:22 PM   #2
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Background to control unit suspicion.

I typed in a more detailed explanation with my question, but it didnít post. Here goes: Arriving after a 5 hour trip to the campground, I found both A/C units unresponsive, bedroom slide and an assortment of lights also unresponsive. Dinette slide works, water pump and several lights too. Both touch panel and iPhone behave the same. I suspect a connector may have worked itself loose. I hope this stuff isnít located under the bed!? The panel the mattress rests on cannot be lifted with the slide retracted. Given the location of the breaker panel on the bedís side, unfortunately it seems a likely spot. Before I remove the hinges of the mattress panel, Iím reaching out for advice. Much appreciated!
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Old 06-07-2024, 08:45 PM   #3
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On my 2022 37L it is, in fact, under the bed
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Old 06-07-2024, 09:17 PM   #4
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On my 2022 37L it is, in fact, under the bed
Thanks for the quick reply! I’ll wait until we get home tomorrow to look.
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Old 06-13-2024, 01:04 PM   #5
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Seneca 37RB Firefly problem solved.

After arduous email and phone research with Jayco and Firefly, I was able to start troubleshooting. The wiring diagrams from Jayco didnít prove very helpful. Colors donít match, for example, and connectors are not correct either. The Firefly diagrams were very helpful however, and by taking the layout of the Jayco diagrams, the symptoms pointed to the Roof Harness, which starts its journey by going into the basement under the bed. Every device that wasnít working was on this harness. Oh boyÖ I noticed that all the grounds were bussed back to one point, which was 10 ft shorter than the home run to the Firefly. Looking underneath the chassis, I found four clusters of grounds in the very back of the passenger side of the coach. The self tapping screw on one had sheared off, possibly helped by corrosion. Whew, no wall removal, etc. needed! Time to reassemble the bedroom.
So, if you encounter a similar case of several functions not working, start back there instead of looking under the bed.
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Old 06-13-2024, 01:38 PM   #6
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Ground issues are very common on these things because how cheaply they terminate the ends and are often the cause of many electrical problems. I also had some issues that lead to a broken screw letting 5 grounds just hanging there. I have found all the ground termination points and fixed them by adding a Blue Sea Bus Bar and adding heat seated terminals on each wire and attaching to the bus bar and also grounding the bus bar on each end. I have found and fixed the grounds in the center rear, the ones up under the rear cap on the passenger side and a cluster up under and behind the entry steps.
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Old 06-13-2024, 10:10 PM   #7
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Ground issues are very common on these things because how cheaply they terminate the ends and are often the cause of many electrical problems. I also had some issues that lead to a broken screw letting 5 grounds just hanging there. I have found all the ground termination points and fixed them by adding a Blue Sea Bus Bar and adding heat seated terminals on each wire and attaching to the bus bar and also grounding the bus bar on each end. I have found and fixed the grounds in the center rear, the ones up under the rear cap on the passenger side and a cluster up under and behind the entry steps.
That’s beautiful! It will be a project to copy your idea when things quiet down here. Although self tapping screws may make very good contact ( for a while), the relationship between torque and how much resulting pressure the screw head will manage is not very controllable. Thanks for mentioning the locations you found.
In a perfect world, they could have brought most of the ground wires all the way back under the bed to a bar similar to a breaker panel, then used a robust single braid to the chassis. Single point grounding. Too much work to implement after the fact, but I love your hardware.
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Old 06-14-2024, 12:03 PM   #8
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I Agree with Bosse. A good single ground return point would be good practice. I was amazed that there was no return point under the bed when I upgraded my Water Pump supply. I added a Blue Sea ground buss under the bed.

Rusty, Your project execution and workmanship is excellent on all of your MANY upgrades! Was this a problem that you corrected and made bulletproof, or something you noticed and fixed before it bit you?
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Old 06-14-2024, 12:50 PM   #9
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I Rusty, Your project execution and workmanship is excellent on all of your MANY upgrades! Was this a problem that you corrected and made bulletproof, or something you noticed and fixed before it bit you?
I discovered this on bout our 3rd trip out when I discovered the batteries were not charging g when running the generator and in troubleshooting, discovered that the converter panel had no ground. Finally found the messy, corroded mass ground up under the back where a screw holding
4-5 ground wires. As soon as we got home, I upgraded it to the Bus Bar. This was one situation where I was glad that z Jayco leaves excess wire as all of them needed trimming back quite a bit to get rid of corrosion under the insulation. From what I have been told, this can happen when a coach is transported in the winter and the salted roads back East rust and corrode this area pretty bad if the dealer taking delivery does not properly clean.
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Old 06-15-2024, 06:12 AM   #10
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Work position convenience?

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I This was one situation where I was glad that z Jayco leaves excess wire as all of them needed trimming back quite a bit to get rid of corrosion under the insulation. From what I have been told, this can happen when a coach is transported in the winter and the salted roads back East rust and corrode this area pretty bad if the dealer taking delivery does not properly clean.
Did you have to perform most of this from a creeper, or were said excess wires long enough to allow a dignified position?
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Old 06-15-2024, 08:28 AM   #11
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Did you have to perform most of this from a creeper, or were said excess wires long enough to allow a dignified position?
For the large rear cluster, I parked where my driveway slopes down so I was able to sit up under the back end and do the work. For the other two smaller ones, I had to do it on my bad on a creeper.
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Old 06-20-2024, 08:29 AM   #12
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For the large rear cluster, I parked where my driveway slopes down so I was able to sit up under the back end and do the work. For the other two smaller ones, I had to do it on my bad on a creeper.
Good idea! I will try at the entrance to our barn, hoping itíll work. It is definitely worth the effort to minimize this obvious problem issue. Thanks!
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