12 thoughts on “Why Does the Car Stereo Have Power But Doesn’t Turn On?

  1. Vitor says:

    Hi David, i have bought a new radio and a set of sound speakers to install on my mercedes w123 but the problem is that the radio turns on but i get no sound i had checked the speakers wires radio wires everything but i cant understand why?And by the way the radio came with lots of wires to connect to others speakers but i didnt used some of them,do i have to remove the unused wires ?

    • ThCB33R says:

      ISO to ISO amplifier integration interface !

      in your Mercedes the standard sound system is controled by
      your bcm (body control module) when you turn on your radio
      it gives a signal to your bmc the bcm turns on your amplifier somewhere hidden in your car(purple wire .also called pci bus or iso j1850 , whene you replace the radio for a aftermatket radio ,the amplifier will not turn on because the bcm gets no signal and so you have no sound ,
      simple solution is to figur out where your amp is located and just
      bypass the wires (youtube “bypassing a factory amp”)

      there are also boxes you can put between your originale wirering harnas and the box tricks your bcm to switch on the amp
      just google ” ISO to ISO amplifier integration interface (Bose and harman/kardon) “

  2. Jeremy says:

    I hooked new head unit up in my car it had power and turned on then it shut off and will not power back on a multimeter for the battery Excel was good so and there was nobody fuses what could possibly be the problem because the head unit is brand new please give me some answers

  3. neil cobbold says:

    hi great read . i bought a haulingan hl 8788 and everything worx but the screen any help wojld b much apprieciated fitted to a2002 e46 touring with 17pin round plug at dash

  4. Robin says:

    Hello. Today my radio sound stopped working but only for radio stations. I can use my Bluetooth and get sound and also sound with XM radio. It came on once while I was driving and then again when I got back in the car but only for a minute.

  5. Todd says:

    David,

    I have recently installed a media receiver with Bluetooth in my daughters 2005 Ford Escape xlt. The I naught the wiring adapter at auto zone that was supposedly for this make and model car it had 12 wires. The wiring harness for the aftermarket stereo had a 15 wire harness. I matched all colored wires and connected them. The 3 wires that had nothing to connect to were orange reverse, blue/black power antenna and orange/black dimmer.

    The unit appeared to work properly until it go dark out and the headlights turned on. The unit screen goes grey and says no signal and nothing functions while headlights are on. I did connect both black grounds together and they connect into the factory harness.

    Model of aftermarket radio is a Dual. Model number XVM296BT
    Do you have any idea what I did wrong?

    Thanks,
    Todd
    .

  6. Matthew deese says:

    I have 12 years experience in electronic devices.AMPS,CAR AUDIO,COMPUTERS.ETC.THE ONE THING I EXPERIENCE IS ALL EQUIPMENT IS DIFFERENT.BUT ALWAYS HAVE THE SAME OUTCOME.WHAT IT’S DESIGNED TO DO IT WILL DO.AS LONG AS IT’S BEEN PROPERLY INSTALLED.

  7. Karma Wangchuk says:

    Hello sir,
    I had bought panasound PN-6330BT/6330GPS 9months ago and now it is not working. It gives the power light but it is not functional. Screen is not turning on and cant’t play any thing. What could be the problem?

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