I just bought a new Pioneer DEH-P5900ib deck for my 93 Civic EX
I spliced everything to the harness I bought and connected all the harnesses correctly, when I went to turn it on there is absolutely no power coming to it. I checked for blown fuses, nothing there. I tried re-splicing the power wire between the factory harness and pioneer harness.

Only things I can think of right now:
1) The blue remote wire from the Pioneer is connected to an unmarked, yet blue wire from the Honda harness.
2) Head unit is fried
3) Some wires aren't/are connected that should/shouldn't be connected

Some suggestions on what might be wrong would help a TON.
I have already put my factory head unit back into the harness just to narrow the problem and it powered on fine. I think that I have a wire connection issue.

 

Well, one thing that I would ask you is
where did you buy, and what brand is your harness
Once I had a harness that said it was for the exact year, model, trim of the vehicle, however, it just wasn't correct
I bought a different wiring harness and everything worked just fine.

 

Bought everything at Best Buy. Employee pricing on all that is ridiculously cheap.
It's a Metra harness, and it fits fine...i don't know if it could be a wrong harness if it plugs in...

 

Well, the only reason I was mentioning about the harness is because that is the problem I ran into when the head unit that I was installing didn't work. I just didn't feel good about the harness (only because it was a strange brand). So after replacing it the head unit worked fine. It could very well have been some other problem solution thing completely. All i know is I switched and it worked.
Also, did you soder the wires together or just twist them together?
Heat shrink wrap?

 

Wait, did you connect the blue wire (Remote Turn On wire) to something coming out of the harness?
If so, why?
That connects to an amplifier.
It should just have a connection from the back of the headunit directly to the back of the amplifier.

 

Twist + electrical tape

The connections are fine...even if they weren't I KNOW the power connection is.

Should I splice the ground wires together or should I ground them? because I grounded them to bare metal.
All I can think of is that the head unit is fried somehow.

 

The ground, power, speaker, etc. wires should all just splice into the wiring harness.
I dont usually ground the wire from the head unit to a seperate grounding source.
By the way, sodering is the way to go, better connections.
But anyway, when you were installing the unit, did you have the negative terminal disconnected from the battery?
Just a precaution I always take.

 

[sm=smiley23.gif]
i kind of tried taking it off but gave up when the screw was rusted in there.

i really raped myself these past couple of days.

however, i can pop my factory stereo in and out with the negative terminal in and it works fine...

 

Well at least you know that there is power still going to those wires for the radio.
Maybe the head unit is fried, maybe you have a wrong wire connected/not connected.
Don't know what else to tell you, maybe take it back to the place you bought it and exchange it
See if that makes any difference

 

thinking exact same stuff.
luckily i work at best buy where i bought it so i just exchanged it while i was working.