Community Forums

Florida Fun · 11-18-2016, 08:19 PM

Hello, I am new to this forum and hope someone may be able to assist. I have acquired a 1999 National Tropical 3650 and have an issue with the battery disconnect switch. The coach batteries have and hold charge however the switch will not connect my 12volt draws. Any help would be greatly appreciated. My ceiling lights will not work, the slide will not energize etc.

Rook · 11-18-2016, 09:24 PM

Assuming you have a DVM or VOM and know how to use it, looking at the diagram attached, open file, (right click, rotate 90 degrees), the Battery Disconnect Relay switches 12VDC between JP3 and JP2. Check for 12VDC on JP3, if good, operate disconnect sw and see if you have 12VDC on JP2, if no, then the relay is not functioning. Could be a bad relay (on back side of board) or not getting energizing voltage from switch/relay at the disconnect panel. Verifying test, connect a short from JP3 to JP2, coach draws should work. On my coach, 12VDC Distribution Board is located last rear bay, passenger side. Rook

12v,120v power system all models.pdf

Florida Fun · 11-19-2016, 03:43 PM

Thanks, I believe it may be the switch itself. I have it removed and am trying to locate another. The reason being is the light above will not activate at all yet I get power to my steps and step light. No interior lights, no slide room control it is in the same panel as the disconnect switch.

chboone · 11-19-2016, 10:07 PM

I have the same problem with my switch. If I play with it, it will finally engage the disconnect. I pulled the switch out and got the P/N 150611E and manufacturers name Eaton. Searched on line found some suppliers but most would not sell just one. Found the switch at Newark Element 14 $3.69 each with $12.50 for shipping. Trying find it or a subitute local.

1506-11E - EATON - Rocker Switch, Non Illuminated, SPDT, (On)-Off-(On), Black, Panel, 15 A | Newark element14

Florida Fun · 11-20-2016, 06:29 PM

Thank you. I got the wiring diagram from another member and some pointers. This seems to be a common issue. I will try to find one local but they are like looking for a needle in a hay stack. I appreciate the link.
Scott

Florida Fun · 11-20-2016, 07:04 PM

My 12VDC Distribution Board is located in the Bay next to the entry step. Batteries are holding charge and converter sounds like it is working. I will replace switch first then work back from there.

Scott

Florida Fun · 11-23-2016, 06:51 PM

Quote:

Originally Posted by Rook

Assuming you have a DVM or VOM and know how to use it, looking at the diagram attached, open file, (right click, rotate 90 degrees), the Battery Disconnect Relay switches 12VDC between JP3 and JP2. Check for 12VDC on JP3, if good, operate disconnect sw and see if you have 12VDC on JP2, if no, then the relay is not functioning. Could be a bad relay (on back side of board) or not getting energizing voltage from switch/relay at the disconnect panel. Verifying test, connect a short from JP3 to JP2, coach draws should work. On my coach, 12VDC Distribution Board is located last rear bay, passenger side. Rook

Attachment 144711

Rook, I replaced the switch and had no change. I took a wire and shorted jp2 and jp3. Interior 12V draws activated. I had ceiling lights etc. does this point toward the relay being faulty?

Scott

Rook · 11-24-2016, 08:15 AM

Scott....It may be a bad Disconnect Relay, or maybe not! The Disconnect relay get's its 12 volt energizing signal from the panel switch that you replaced.......but, I think it is not a direct connection to that switch, I believe the panel switch energizes a smaller relay, or an electronic switch (on my coach) on the Board and that then turns on the the Disconnect Relay. If that's correct, then the smaller relay or electronic switch on the Board could be where the trouble is. You can check to see if the Disconnect Relay is getting the enerziing voltage by measuring across the two energizing terminals on the relay. Using a mirror, look under the bottom of the board, lower center right side, backside, and you will see a large black thing with two lugs with nuts connecting a grey wire and a red wire. That's the 12 volt energizing terminals. If you get the energizing volts, then the Disconnect Relay is bad. Rook

Florida Fun · 11-24-2016, 10:58 AM

You're awesome!! Thank you and have a Happy Thanksgiving. I will keep you posted.

Scott

Florida Fun · 11-29-2016, 04:21 PM

Quote:

Originally Posted by Rook

Scott....It may be a bad Disconnect Relay, or maybe not! The Disconnect relay get's its 12 volt energizing signal from the panel switch that you replaced.......but, I think it is not a direct connection to that switch, I believe the panel switch energizes a smaller relay, or an electronic switch (on my coach) on the Board and that then turns on the the Disconnect Relay. If that's correct, then the smaller relay or electronic switch on the Board could be where the trouble is. You can check to see if the Disconnect Relay is getting the enerziing voltage by measuring across the two energizing terminals on the relay. Using a mirror, look under the bottom of the board, lower center right side, backside, and you will see a large black thing with two lugs with nuts connecting a grey wire and a red wire. That's the 12 volt energizing terminals. If you get the energizing volts, then the Disconnect Relay is bad. Rook

Rook, I replaced the switch with no change. Relay test is next. If I jump jp2 and jp3 to pull the slide in and raise the jacks will that cause an issue for other 12 volt draws?

Scott

Rook · 11-29-2016, 05:00 PM

NO.....Shorting between JP3 and JP2 with a heavy gauge jumper, 10 gauge stranded copper or larger, is no threat to anything.....that's what the high current Disconnect Relay does. You could even operate that way temporarily, for a while, until you find the trouble and install a "fix". All the protective fuses are still in play. Rook

Florida Fun · 11-29-2016, 06:30 PM

Thank you for you insight, knowledge and assistance!! I choose to dance...

Florida Fun · 12-04-2016, 07:59 PM

I jumped JP3 and JP2, energized the jacks. They performed as they should. 5500 Onan Genset turned over well, started and ran for a short time then stalled. The slide motor energized but blew a 20 amp slo blo buss fuse when bringing the slide in. It took 2 fuses to bring the slide all the way in. Not sure what is drawing the extra current to cause the overload? Dometic side by side refer appears to cool, takes a bit for it to get cold. I think the day went better than I expected.

chboone · 12-04-2016, 09:53 PM

Did you have the engine running or shore line plugged in when operating the slide? As the battery voltage goes down the amp draw goes up. Next time run the engine or generator or shore line plugged in to keep the battery voltage up. Generator or shore line will only help if your converter/charger is working. RV refrigerators take time to get to full cooling capacity. My side X side takes about 12 hrs to be cold enough to load it with cold food.