Wiring help for tying into cargo light

I got a replacement bumper for my 2016 DC Sport that came with LED lights (2-39 watt, 2-48 watt although I may not use them all). I'd like to wire them into the cargo light that comes on when using the key fob to unlock the doors, so I can see behind the truck when walking up.

The LEDs didn't come with a relay. Would I need to add a relay or larger fuse?
The LEDs only have positive and neutral wires. What wire out of the cargo light switch would I have to tap into in order to have the LEDs come on with the cargo light?

Thanks for any help.

 

Thanks for all the help everyone!

 

No advice is better than bad advice!

 

@SwampThing18 If those wattages are correct, you have about 15A there [2(39) + 2(48)]/12, so yeah, you’ll need a relay. You mentioned these being in the rear bumper, so let’s assume about 20’ of wire, so if you wanted to keep it under 2% voltage drop, you’re looking at 8 gauge. If you don’t mind a little more voltage drop, you can get away with 12 gauge. Or compromise and go with 10 gauge.
All of the above comes with a really big disclaimer though. I am betting those wattages are an “equivalency” as opposed to actual draw. That is a good amperage for a 48” light bar, just to give you an idea. So if you can find the actual draw, you’d be better off.
Now, regardless of all that, I would definitely use a relay. You can tap off of the cargo switch (blue wire I think?) and feed pin 85 on a relay. Since this is ground switching, you will want to use a relay with a diode built in, or add one to avoid flyback voltage spikes. That’s nothing as hard as it sounds

 

Thanks!

 

Puppypunter, If you had a cargo light breakout T harness, could you run those lights off of the existing wiring without an added Relay?

 

If those wattages are actual draw vs equivalent brightness, I wouldn’t. I can’t say for sure obviously, but I would keep it under 1 amp, 2 tops. The cargo light and OEM bed lights in the 2020+ are pretty low draw, so I don’t think Toyota would have splurged making the wire way bigger than it would need to be.