[f5fstop]

That is why, I believe I have been suggesting a relay to prevent any problems with blowing fuses, or even worse, cooking the vehicle.
The current draw to activate a relay is minimal, the current draw for the cooler is not.
Not sure what else I can say; other than if you want to wire in a large current draw device safely in to the vehicle, a relay is required.
And it is not a bad idea to install an inline fuse for the power circuit to the cooler, right where you tap into at the relay.

Many of the off-road lights people are installing have a current draw of 7-9 amps, and they are using relays with fuses to control the circuit. Your cooler has a nominal draw of 3.5 amps; therefore, it could draw more.