Pioneer Deh-1300mp Wiring

Pioneer car stereo wire harness the same?

Here is my situation: I have a a Pioneer DEH-1600 already installed in my 99 accord which my dad paid to have it installed at pepboys. I recently just purchased a Pioneer DEH-1300mp to replace my old one because I wanted an aux input. The problem is that I know little to nothing about wiring. I can take things apart and install things but I have never tried wiring. The stereo I purchased came with a wire harness as well and I was wondering if I have to completely rewire the harness or if I could just unhook the old stereo and plug the new one in. Especially since the two pioneer stereos are the same model line, I would think that they would use the same wire harness. But unfortunately I do not know. Any help would be greatly appreciated.

Compare the wire colors in the plugs since those are standardized. Generally if it is the one that has a fuse, usually 10 amp, below the connector on the back of the head unit they are all the same. My Sanyo, Sony Aiwa (Sony in drag) and JVC all use the same harness and connector pinout and as such swap out in a matter of seconds.

I have an older Pioneer that has a different connector (it looks like computer ATX motherboard power connectors) and I found out the hard way that a Clarion with the same connector did NOT use the same pinout. Some of the speaker and power wires were swapped between the 2.

Yours should be the same but check them to be sure.