2001 Dodge Ram Off Road

I'm not an expert, but I have installed a couple of car stereo's that worked when I was done. But recently I attempted to install 3 different radio's in my truck that end up with no sound at all. Everything else seems to function properly, but no sound. The radio's all came out of other cars, and I got to listen to them, but when installed in my truck, they have nno sound. I purchased the premade harness adapter from the store and followed all the instructions, but no result.  So if anyone knows where the secret button is that I cant seem to find, please let me know. Im not sure of the different systems for my model of truck, but the factory unit was just a tape deck, and the only other thing is my truck has the tweeters in the window pillars.

Thanks for any help with this one.

Make sure that the aftermarket radio's blue, or if present blue/white, wire is hooked up  to the blue wire of the wiring harness adapter.

Does this have an infinity sound system in it?

Ahhhh, the pesky blue wire, I thought it want used. Apparently it is.

Thank you very much, you have saved me a ton of stress.

Pesky blue wire=remote turn on lead=turns on factory amplifier

-Cy