Good morning everyone,

I have been trying to wire up my new Pioneer AVH 3300NEX without much success. At first I wired up everything as I did in my previous headunit installs on other cars. The headunit was powering on with no sound and it would not keep memory once the car is turned off. I also noticed that I had to plug in the blue wire to get the Amp in my limited to power up. Got some sound but it is very thin and super low at max volume. It is not listenable. Something is wrong. Then I also noticed after reading the sticky threads that I should wire up the power red and memory yellow differently. Do I need to interchange the the wires in the plug of the harness or do I hook up the red with the yellow and the yellow with the red? I tried the latter and now my headunit does not even power up. I did not hook up the small wires for the speakers as I am using the 4 volt pre-amp rca outputs.

​Please help me. I have been clueless about my problems with the install for the last few days. When I put the stock headunit back on everything works as it should.

Thank you kindly,
Alex

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It sounds like you are on track for proper installation, could it be in the hu settings? I also used the rca plugs and had good volume, but I direct wired it and the volume increased and kept its clarity

 

I looked into the settings and it did not allow me to change anything.

 

Do I need this for my installation?

 

I do not believe that is the answer if you are using the original amplifier. That OEM amp was designed to be driven with speaker leads.

The three cars I've helped get going had OEM amps in them, and I just wired speaker outputs to the amps and they worked well.






HERE is how I do it:

• Buy a generic harness for the new head (if it does not come with "flying leads" already).
• Set the head and harness up on a table.
• Get the manual for the head out.
• Download and print the diagram from the service manual for the wiring from existing head to amp.
• NOW, draw a new diagram of what color goes to what color. Pay attention to ALL wiring, battery lead, ground, ignition lead, amp-enable lead, speaker leads, etc.
• DO NOT proceed to the last bullet until you have figured out all connections.
• Sit in the car with the diagram and make your connections.

 

Okay so should I unplug the rca speaker plugs and use the small speaker wires even if my headunit has 4v pre amp rca outputs?

 

I would. Now, the 4v RCA outputs SHOULD work, but don't tie the "Ground" or commons together. Take no shortcuts here.

 

I never do shortcuts. To me using the small wires is the shortcut lol. I am very meticulous.