How to Fix a Car Head Unit That Won't Turn On

If your car head unit does not power on successfully, you can try the following solutions to fix the problem:

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  1. Check that the 12 volt and memory wire are connected together. This is a common mistake that can cause issues to make the car head unit fail to power on.
  2. Examine your Android 4.4 car head unit plug carefully, do you see in cuts in the wiring? Does the plug look damaged? If you do see any damaged in both aspects, then replace the plug.
  3. Turn on your car ignition. Some car head units only turn on, when you turn on the ignition and start your car.
  4. Check the fuse in the head units fuse holder. If its blown replace it and you hopefully fixed it.
  5. Get a voltmeter and check the voltage on the red color wire, the wire that supplies 12 volts to the stereo. If it slows a reading of 12 volts, then it indicates you have got a good power source and its not the problem.
  6. You could have a bad ground connection. Check if the ground wire is touching the car’s mental. If there is any rust on the ground terminal, get a screwdriver and scratch it off.
Source: http://moneyexpertsteam.blogspot.jp


【Customer Review for Pumpkin】LM-C0676 Toyota Universal 6.2" Android 4.4 Double Din Car Stereo

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By HalfPint

Well, with all the help and advice I got brave enough to see what happened…It’s installed and all seems good. I have accessed the menu and set the steering wheel control OK and installed the GPS in the compass cluster. Was a little worried about that I’d break the dash panel, it put up more resistance than I expected, but I didn’t.

The mapping works great (though haven’t been anywhere yet, but locked on to the location really fast).

The OE brackets line up perfectly. And the unit fits the hole perfectly. It powers up with the Toyota logo straight off. It looks OE which is great.

I plugged three of the five connections out of the OE head into the back as shown earlier. The others don’t seem to connect, one is to the Aux and we know that doesn’t work, not sure about the other but it all functions withe the exception of the iPod. I didn’t connect any of the RCA’s or other wires at this stage.

I plugged the iPod lead and the USB lead supplied direct into the unit (LM-C0676), but not sure whether the slots are different. Anyway, the iPod is connected (powered and shows on iPod screen), but not communicating with the head unit.

Now I just need to  learn how to use Android.

So here’s the installation process:

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For more stunning plug and play car stereos, please visit:


【Customer Review for Pumpkin】KD-C0224 Universal 6.95" Android 4.4 Double Din Car Stereo

This thing is amazing. There is so much more you can do. There are some minor issues that can be resolved with a little perseverance.
By M.Duus
0224

Pros:

  • WiFi Tethering: This unit connects up fine to my cellphone and tethers perfectly, everytime, without fail.
  • Bluetooth: While the head unit is connected to cellphone’s WiFi tether, it’s also able to connect to both my cellphone’s Bluetooth for audio and cell, as well as my Bluetooth OBDII unit which I use with the provided torque app.
  • Play Store: All apps work and I have not had any issues at all.
  • Radio: Signal in my part of the USA is fantastic. Sound is strong, and very little “hiss” for weaker stations.
  • DVD Player: Mine worked when tested, but I don’t use it, so I can’t comment extensively.
  • USB: I connected a 64 bit USB thumb drive and it has not given any issues.
  • 3G Dongle: I haven’t used this, but from reading at XDA forums, there are some issues with powering the device. A powered USB hub fixes this issue.
  • GPS: iGo app is not my favorite, so I simply downloaded Waze, and changed the setting in the GPS settings of Android to use the Waze app when Navigation button is pressed. You can do this with any GPS app, such as Google maps, which worked perfectly well with the satellite view as well.

Cons:

  • Tuner: Looses presets occasionally. Not sure why yet. It’s not a big issue for me.
  • Random: When I use certain apps, and don’t close them before I turn off the car, they force close when the head unit restarts. Not a big deal, but something to be aware of.
  • Fitment: Unit is about 1/4″ wider than USA standard double din head unit. You’ll need to trim the bezel on your car to fit. If you don’t want to do this, then this unit is not good for you.

In Summary

I have waited a long time for a head unit that could do everything I wanted it to do without issues. This unit does them all, with only very minor issues. All of which I feel will be resolved with future firmware and ROM releases. The manufacturers are constantly releasing updates and fixes, and are very hands on in the development and support. I highly recommend it !
For more highly recommended car head unit, please visit: autopumpkin.com