Problem fixed!.

[YOanthony]

Hey all! Got a DEH-P4050UB which I had put into a 96 Accord about a year ago (pretty much strip some wiring at the end of the harness and wires coming out the car, got some info of what goes where, and then stuck it together with electrical tape - I was young) so anyway. I chose to take it all out, get a universal female harness from work and a new Pioneer harness, strip some wire at the end of the universal female, solder that to the cars wires and then it would be cleaner and easier to take out if ever needed.

SO. That brings us to today. I took out the head unit, but as I did I wrote down which coloured wires from the Pioneer harness go to which wires in the car, and I then I began to solder each wire to it's corresponding wire. All went well, and I had no wires remaining (except for one - the power antenna which I didn't solder as I don't use the antenna, and as I set the car to ACC the antenna goes up and I hated it. -.o ) but when I plugged it into the head unit, it didn't come on. :s So then I put the old harness in and connected the ACC, battery, ILL and earth wires from the old harness to the car wires and it still didn't come on. Any ideas guys? (I know it's hard to know without pics or seeing it person) - but could it possibly be something like a fuse? I didn't get time to check the under dash fuse, but the fuse on the back of the head unit was fine.

I should also mention, yesterday the head unit worked fine, and had been working for the 4 years that I've had it (since new) :P so I don't think it's the head unit.

EDIT: I should again also mention that I put a multimeter on the wires to check how many volts were coming through and no wires were giving me any volts except the battery wire (coded yellow) which was only giving me 4.3V

EDIT EDIT: under dash fuse is NOT blown. And I don't think there is any power coming through the battery wire (yellow) now. -.o fml.

[Drifter995]

There may be a short somewhere in the wiring line...
iirc, you should have 12v in the battery wire, and 12v in the accessory wire when acc is on...
You my have wired up the illumination wire to the acc wire or to the power wire... have you tried turning it on with the lights on?

Could be many things, but try those things.. If you can get a test light or multimeter, check the wires for 12v. check for power first, then turn on acc and look for the acc wire, then turn on the lights and find that.. check the manual to make sure you have the right wires from the headunit going to the right wires on the car.

[tiksie]

AFAIK in some Honda's, the interior light fuse is connected through the headunit wiring, so check to see if that fuse is gone. Forgot the amperage, probably a 15A.

Check the fuse behind the headunit aswell.


EDIT: Seems you have checked fuses already. Did you check the interior light/cigarette lighter fuse ?

4.3V sounds like a flat battery voltage :/ put the multimeter on your battery terminals and see what volts you're getting.

[YOanthony]

Thanks for everyone who replied, but I found the cause of the problem. I had a blown fuse in the engine bay box, and I also hooked up a button to run my LEDs and I made that run off the cigarette lighter power / earth. But it was still blowing fuses, so I earthed it straight to the chassis and everything is a-okay now!

[Drifter995]

ah, all good then.