Which Side of Roadmaster Diode Goes to RV and to the Towed Vehicle

Question

Question:

The instruction page isnt available online at the moment, so I was hoping you could tell me which side of the diode goes toward the motorhome, and which side of the diode goes toward the towed vehicle? Thank You.

asked by: John

0

Expert Reply:

The IN side of the Roadmaster Diode part # RM-690 goes to the motorhome side of the wiring and the OUT side goes to the vehicle being towed.

expert reply by: Jameson C

0

Answer 1

Does your trailer have solar panels? We've heard of this issue and and it appears there is a tech bulletin out about how the solar panel kits on trailers make the truck have this issue and disconnecting helps. The tech bulletin is 23-NA-113 and…

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Answer 2

If you want the loading lights on the trailer to function with both the switch and batteries as well as off of the reverse light circuit from a 7-Way trailer connector you can certainly make that happen. But instead of the reverse light circuit wired…

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Answer 3

We have diodes like the part #RM-790 that you could use to isolate the charge circuit from your trailer wiring so that it could charge the battery when needed but would prevent the solar panel power from backfeeding onto the trailer wiring circuit…

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Answer 4

Diodes like the part #RM-790 only allow current to flow in one direction. Usually a diode is a small cylindrical shaped component (not in this case) which has two leads on it, the anode and the cathode. When the anode side of the diode is facing…

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Answer 5

The GloLight Uni-Lite LED Clearance or Side Marker Light with Grommet - Turn - Round - Amber Lens #MCL121AK9PVG will work as both a clearance light as well as a turn signal. The Uni-Lite LED Clearance and Side Marker Light w Grommet - Submersible - 2…

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Answer 6

Installation of the #RM-790 will take care of that problem you're having. I would wire it on the trailer side at the battery rather than mess with the wiring on your 2024 Sierra 2500. The other solution is to follow the GM note and add a…

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Answer 7

If all you want is to prevent the 12 volt power supply of your trailer battery wiring from backfeeding onto your vehicle wiring or vice versa what you need is a one-way diode like part #RM-690. This only allows current to flow in one direction so…

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Answer 8

The diode part #RM-790 that you referenced does exactly what you are looking to do. It takes two power sources and can combine them onto one wire and prevents backfeeding from either circuit. So for what you need this would work well.

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Answer 9

You do not need to have a diode between the two 12 volt batteries on your trailer and tow vehicle but it is not a bad idea either. The Roadmaster Single Park Light Diode part #RM-690 will work perfectly for this. The factory 12 volt pin on most 7-way…

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Answer 10

Yes, you will want to use a single function diode, like part #RM-690. You will need to wire it in between the breakaway battery and the trailer battery to stop the backfeeding from the battery to the breakaway system.

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Answer 11

While unlikely, it is certainly possible that the trailer battery could backfeed to your vehicle's battery when hooked up under the scenario you described. To make sure this doesn't happen all you need to do is add a single diode like the…

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Answer 12

You do not want to pull any fuses in the 2019 Chevy Equinox when you flat tow and you do want to keep the battery connected. In the past there has been issues with extreme wobble when flat towing an Equinox because of pulling the fuse for the body…

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