Bit of background info before the questions I have.... I am hooking up a P4300dvd and have connected a 4 channel amp and a Mono amp. When I turn accessory power on, the head unit does not turn on but the amplifiers do.

2 questions:

1. I did not fully reassemble the dash i.e. the top plug behind the oil pressure/voltage/info gauges is unplugged. Would this cause a problem with the grounding of the CD player? I grounded straight into the harness, not an external ground.

2. If a headunit doesn't turn on why would amps turn on?

 

Assuming the amps aren't powered through the head unit? When I installed my KenWood when I plugged everything in it wouldn't turn on. Took it out double checked the wires and everything was fine, not sure if coincidence but this time I plugged it all in and made sure the Antenna was plugged in and it worked perfectly.

 

i would check the grounding, Ground it to the body is better than directly to the harness... That might be the problem, otherwise good luck!

 

^^ This as well, just double check everything and check fuses.

 

Yeah, like others said check the ground. I have mine grounded on it's own(not through the harness) and it works fine.

 

That is what I was thinking as well, didnt want to discon it from the harness until I heard back.

The other thing that makes me a bit nervous is I am only connecting to one factory plug, compared to the 3 that connected to my bose headunit. I would imagine that the remaining plugs were for the bose setup?

The only wiring that I connected were accessory, power, ground, and illumination. Seems right in my head as I don't have a power antenna, eventually doing the DVD bypass so I didn't splice into the ebrake (terminated the connection for now - bc I really have no need for DVD), and all speaker connections are via RCAs.

 

Fixed. I regrounded it to the bolts by the shifter, but no luck. I reinstalled everything including the top plug by the gauges and it worked perfectly. Guessing that harness up top has somethign to do with the center console power.

 

Same headunit I have love it. So easy to use with the touchscreen

 

i have the same unit, love it

it is weird that ur amps are turning on, cause their getting the signal to turn on (the blue wire) from the headunit having power.