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Discussion Starter #1 (Edited)
I’m installing a Pioneer AVH-24400NEX head unit. Got it from Crutchfield along with their wiring harness. Got most everything working except the steering wheel controls. Thought I had that figured out after disconnecting/reconnecting the maestro magic box connections and then the steering wheel buttons worked !
Then I crammed the mess back into the dash and of course - nothing on the steering wheel worked. Pulled it all out again and disconnected/ reconnected the 4 pin thingy that I was told was the culprit, but no joy. Still nothing on the steering wheel works.. was told I should re flash the unit, but haven’t done that yet. I doubt it will do any good. This crap is so frustrating. Car audio installation pros should be granted sainthood...lol. I'm pulling my hair out.
BTW...When the steering wheel buttons are pushed , the green light on the maestro blinks, so I guess the signal gets to the box, but not to the head unit.
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Discussion Starter #3
Yes. I think all the soldered connections looked secure and shrink wrapped.
However, that is a logical place to look at. I’ll call the idatalink people and confirm that it’s just the 4 pin connector that bears closer inspection.
 

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Discussion Starter #4
SOLVED !

After spending 20 min on the phone with Mr. Maestro, it appears the problem is the microphone jack for the equalizer microphone. If that jack has a plug in it, the competing one next to it from the Maestro unit gets confused. So by unplugging that mike jack, the problem went away. However I guess that means that I need to figure out the equalizer settings before I put the head unit back in the dash.

This is a weird conflict/ problem. I wonder if it is unique to this specific head unit...
 

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Discussion Starter #5
I subsequently was told by Crutchfield that the equalizer mike was in the wrong jack. That the equalizer mike plug needs to go in the same hole used by the maestro unit. So only one or the other can be used at any given time. What a lousy design. I think some other head units may have a jack in the front, but not this one. So when I add a sub later on, I’ll need to open up the dash, pull the head unit just to plug in the equalizer mike.
 

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Wow, really!? Most of the NEX units actually have the calibration mic jack behind the motorized screen.

I just checked page 100 of the User Manual and sure enough, it says to connect it to the rear. That's... uh, a major design flaw right there.
 
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