Android head unit wiring help. Cant get it to work anymore :(

[ph0en1xtk]

Hello there everyone. I recently purchased a new head unit for my car, along with the metra harness and dash kit. I had the unit installed just fine for about 2 weeks, with no problems at all, but when i went to test my rear view camera that i bought separately, i think i shorted something out. Immediately after hooking it up, the screen on my HU just shows white and is unresponsive. Thinking i shorted out the harness, i unhooked everything and tried hooking the unit up directly to the battery by touching the wires to the 2 battery terminals. Doing that made it boot up like normal, with no problems at all. So thinking i was right in shorting the harness, i took the opportunity to order the beatsonic harness and dash kit (as i was having problems with the metra fitment) and much to my dismay, i had the exact same problem with this one as well, now the unit wont even boot on at all from the harness, but still works fine on the battery (again)

This led me to believe that something is shorted even further down the line, but to me this doesnt make sense, because reinstalling my stock head unit works perfectly fine.

Can someone shed some light on this, as im at my wits end now, and im trying to avoid taking it to an expensive audio installer just to troubleshoot.

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[colmc11]

I dont know very much about all this, but looks like I am the only one.

1. I would guess that your head unit is advanced enough to know the power it is getting, so it has gone into some sort of protected mode(?) to protect itself from damage. I guess this would be because somewhere it is getting to much power.

2. If you installed both accessories yourself you may have cut/connected/tapped into a wire you shouldn't have.

I would make sure both accessories have no common wires. If they do then disconnect the backup camera's wire and see if that helps. If not then check all connections. That always seems to solve something. Post what your results are and what you have done to troubleshoot.

Thanks

 

[ph0en1xtk]

well i tried again last night. disconnected the back up camera and all accessories. I unhooked the harness and taped off all the wires aside from the yellow, red and black wires, and connected only those to the harness and plugged in the HU, and got the same results

 

[colmc11]

The only other thing I can think of is does your head unit have any safety air bag/seatbelt/park restriction wires?(wires that prevent you from watching movies while you are driving) I would make sure those are good.

 

[CrossoverOre 10+ year member]

What kind of vehicle and what kind of deck? Can you still connect straight to the battery and have it work? If you have a dmm verify that you have power and ground at the plug for the aftermarket deck.

 

[ph0en1xtk]

I drive a Scion Fr-s and its a knockoff of the following unit:

Ca-Fi Infotainment | Android

If i touch the wires to the battery terminal, it works just fine.

 

[CrossoverOre 10+ year member]

double check the power at the harness.

 

[MEMPHISKANE]

First thing check the fuse panel for your Radio and accessory fuses.

 

[dbertoli]

Yeah I would check fuses.

 

[ph0en1xtk]

i checked all of the fuses, and though none of them looked to be blown, i replaced the radio and acc fuses, then i double checked all the connections between the harness and the head unit to make sure they were all getting a good connection, then i moved the ground wire to a different metal spot under the dash.

some part of this combination allowed the head unit to power up properly and work just fine for about half a day, and now its doing the same thing as before. im not sure what made it work in the first place, but its now back to white screen. testing against the battery terminals once more make it boot properly as before. Im not sure whats going on.

Are there any other things i could test?

 

[CrossoverOre 10+ year member]

what are the voltage levels at the deck plug when you have it installed with the white screen. You might just have to run new constant and acc wires.

 

[ph0en1xtk]

i put a DMM on the wires and both yellow and red get 14.

also suddenly the unit wont power on anymore when touching the battery terminals. it would previously, but not anymore.

Im beginning to think the problem is inside of the unit, since my old stock unit works perfectly fine in the car. Im gonna try to send it in to the vendor for service.