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Discussion Starter #1
Does any one know what the Max Electrical load on the reverse/backup light circuit on the trailer plug harness is of a 2010 Titan?

I want to install 4 24watt LED flood lamps on my travel trailer and 2 in the back of the truck. This would add up to a little less than 10amps. Can this circuit handle this?

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It is a 10 Amp Fuse. I would add a Relay. I am using a single 48 W LED right now, but will increase it to 2 very soon. You wrote you want to use a total of 6 lamps. 6 x 24 Watts = 144 Watts / 12 Volt Nominal = 12 Amps. Even dividing by 12.8 = 11.25 Amp, still not less than 10. You are best served by the typical 30/40 Amp Relay that cost about $5-10 with a harness.
 

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I have two 10" LED light bars under my rear bumper. They are turned on through a relay that receives a signal from the backup lights but is powered by a (14 gauge?) wire run from the battery.

As was recommended above, use a relay. Don't forget to put in a fuse too.
 

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Discussion Starter #4
Thanks for your replies guys.

So what if I put 4 18w led flood lights on the trailer off the trailer plug. 18w*4/12=6A. Or even 4 24w lights would still only be 18w*4/12=8A. Then ran 2 LED flood lights on the rear bumper of the truck directly off the battery and controlled by a relay off the trailer harness?

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