Stuck on “turn key to off position”

[jilewis843]

I have a 2008 Mustang with a Pioneer 4200-NEX. I have 2 problems, 1. The red light flashes(twice) even though I’ve made sure all the connections are secure. 2. If I start my vehicle it starts the setup, doesn’t detect a vin number, chooses platform 1 and the switches to “turn key to off position.” Turning the key does nothing, radio will stay on in the off position, even if I open the driver’s door.

[Dara DeGrand]

On the t-harness, there are 3 plugs that could connect to the car (the big rectangular one, the medium sized one, and the small one). Of those connectors, are all three plugged in? Is the OBD2 connector plugged into the car?

[jilewis843]

Yes, everything is plugged in.

[jilewis843]

So I unhooked everything and redid it all. Now at least it beeps when I turn the car off. That’s new, but it’s still stuck on that screen, still flashes a red light twice and I don’t know where else to go.

Radio works without it hooked up as it should, so it’s got to be with communication somewhere.

[jilewis843]

Also, there was no pink wire from the radio for speed detection, do I need to run that wire to somewhere in the car or is it not need to operate? Other than that, the foot brake isn’t hooked up either. If those need to be run into spots in the car, I can find those and hook up if needed.

[Dara DeGrand]

What you're reporting doesn't make sense. If you're getting 2 red blinks, that means the maestro isn't communicating with the radio. However, if you're getting the menus for platform selection, it shouldn't be flashing red.

[jilewis843]

Once hooked up, it does flash red(twice) every few seconds. If I turn the ignition on, it pops up to start setup on the HU. Once I click start, it doesn’t detect a VIN and just says Mustang platform 1, click next and it says turn key to off position. I turn the key to the off position and at that point it does nothing. Radio stays on, beeps every few seconds, but doesn’t change. Screen slightly flickers(but only in setup) if that means anything, but that is exactly what happens. I’ve reset it, reflashed it, re-hooked everything up and it stays the same.

[Chris LaRoche]

What harness/version number are you using? There's a label on the harness itself. One side will have QC pass and a date, the other has the model and version number. What is that?

Also, what all is connected to the radio's red wire?

[jilewis843]

Ads-hrn(sr) FOR01 VER1.60
QC passed 2020/09/28

The red blinking stops once platform selection starts, it just stays stuck on turn key off. The red wire is hooked to the red wire on the harness and an aftermarket camera.

I disconnected the camera wires and it’s now moving forward, and platform selection is complete. Any suggestions on where to plug in the camera? It has a red and brown wire.

[jilewis843]

I have unhooked anything that wasn’t part of the harness. Everything works except camera view(while not in reverse) it works fine in reverse. Had the backup camera installed by a shop, they ran those wires, camera has always only worked while in reverse, so I have no clue what those wires were for.

But everything is working now, gauges and all.

[Chris LaRoche]

Ah, it's possible that red wire in the cam was connected in the rear to reverse lights, causing the car to backfeed voltage and keeping the radio on. Either way, glad it's working!