How do you get to the infinity amp in 2004 Dodge Ram?

There's no "Infinity Amp" in a standard 2004 Dodge Ram. Dodge Rams from that year typically came with various factory sound systems, some with premium options, but not specifically one branded "Infinity Amp". Infinity was a brand that Chrysler (Dodge's parent company) *sometimes* partnered with, but not consistently as a standard amp designation across their truck line.

If you're referring to an aftermarket amplifier installed in your 2004 Dodge Ram that someone is calling the "Infinity Amp," you'll need to:

1. Look for visual clues: Check behind the radio, under the seats (especially the rear seats), or even in the side panels of the truck. Amplifiers are typically fairly large rectangular boxes. The Infinity logo might be on the amplifier itself.

2. Follow the wiring: If you've located the amplifier (or think you know where it's generally located), trace the speaker wire harnesses. These will run from the amplifier to the speakers. Following them backwards will eventually lead you to the amp's location.

3. Consult your wiring diagrams: If you have a wiring diagram for your specific Dodge Ram's sound system (either the original factory diagram, or a diagram for any aftermarket installations), this will give you the most accurate information about the amplifier's location. These diagrams can often be found online or in repair manuals.

Without knowing more about the specific sound system in your truck, it's impossible to give a more precise location.