Diode Recommendation to Prevent Trailer Battery From Backfeeding onto Vehicle Wiring

Question

Question:

Im not sure if this is the correct item for what I want to do. I want to install a battery in my cargo trailer to power the interior lights. My plan is to locate and cut the constant 12 volt from my vehicle and attach it to one side of the solenoid. Then attach the other wire to the other side of the solenoid. Them I will attach the positive from my new trailer battery to the third side of the solenoid. Does this sound correct? I dont want the trailer battery to back feed my vehicle.

asked by: John R

0

Expert Reply:

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 you'd just need to install it inline with your trailer wiring matching the in and outside to your setup and you'd be good.

expert reply by: Jameson C

0

Answer 1

We do offer the replacement LED monitor light you are looking for with the Replacement LED Monitor Light part #SM99612 for the Demco SBS DUO part #SM99251.

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Answer 2

If you wanted to prevent the 12 volt trailer wiring circuit from backfeeding when connected to your trailer's battery you'd have to use a diode like the part #RM-690. This will only allow the current to flow in one direction.

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Answer 3

Since the Front Runner crossbars have a channel/t-slot on top of them the Rhino Rack adaper part #RR43105 that you referenced would be the correct adapter to allow a Rhino Rack Pioneer Platform to them.

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Answer 4

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Answer 5

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

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Answer 6

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Answer 7

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Answer 8

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Answer 9

I believe you almost solved the problem when you swapped the wiring, but in reality you needed to use 10 gauge wire like part #10-1-1 (sold by the foot). You are experiencing a voltage drop due to the long distance of wire that's not thick…

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Answer 10

For the brake circuit of your trailer you will want to run 10 gauge wire like our part #10-1-1 which is sold by the foot and is standard copper primary wire. We use it all the time here on trailers and it works great. For bonded 14 gauge wire that…

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Answer 11

The reason you would not want to install a 30 amp fuse or circuit breaker in a 4 brake magnet application, when installing a Prodigy P2 brake controller, #90885, is that the extra amperage required to break the circuit could cause an issue with the…

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Answer 12

It sounds like you have a charge line ran from the RV's battery to the trailer's battery. If this is the case then yes, you will need a current limiter (circuit breaker) in between the two in order to prevent any spikes that could in turn…

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Diode Recommendation to Prevent Trailer Battery From Backfeeding onto Vehicle Wiring

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