it has now yellow wire. I will try using the SOURCE button to turn it on and see what happens.
On a hunch, i'm going to guess it was a small typo.
"It has NO yellow wire" ...was probably intended.
Hooked it up today as per your instructions. No luck
swap out the fuse and try again, I've seen fuses that look alright be bad fuses.
Well, after trying and trying again and again with the older Pioneer deck, I gave up and trying to install it. So I decided to wait and get a different radio. On a routine trip to Goodwill this weekend, I stumbled upon an older Kenwood AM/FM cassette deck for 9.99. I still had the box and wires and bought it since it was so cheap. I am happy to report that as of now I am blasting tunes from the radio in my Rabbit.

The deck itself was and older design much like the factory radio. But obviously it had much newer tuning capabilities and a digital display. So I just wanted to thank you guys for dealing with me over the past week or so.
No worries... glad to hear you got 'er running.
I'm a huge music fan as well... can't drive without tunes, right?!
just so you guys know, pioneer radios DO have a big yellow wire. steady current from the battery. i have 5 different pioneer decks in vehicles and laying in my shop. they all have a big yellow constant power wire. they have to have it to function, it powers the memory, and is the main power supply for the deck. to get a pioneer to function, you gotta have the yellow hooked to the batt +, the black hooked to a ground, and the red hooked to the switched power from the key. if someone wants to tell me again that pioneers have no yellow wire, i will gladly supply you with pictures

ive installed more pioneer stereos than i will ever be able to count. and they all had to have the yellow wire hooked up. kinda like beating a dead horse here, but there are yellow wires on every semi-modern pioneer made within about the last 12 years..
There was no yellow wire on MY pioneer radio.
Ok, so for the record here's the Pioneer wiring color code:
Orange: constant 12v+
Red: switched 12v+
Black: ground
Green: left front +
Green/black: left front -
Gray: right front +
Gray/black: right front -
Green/red: left rear +
Black/green: left rear -
Gray/red: right rear +
Black/gray: right rear -
Blue: control output for amp or power antenna
The web site I got this from (can't find it again now, of course!) said that there are two versions of Pioneer wiring codes... and the DEH-42 is wired using old skool version. I can believe it...it is a cassette deck, after all.... one step away from 8-track!
that was the only other option, the deck was ancient. usually the orange wire hooks to the dash lights, and the yellow is the memory wire. so, i guess we are both right..