Would this hurt my head unit? | Ford Escort Owners Association (FEOA)
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Would this hurt my head unit?

Discussion in 'ICE (In Car Entertainment)' started by Striker1211, May 6, 2007.

  1. Striker1211

    Striker1211 New Member

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    I'm thinking of running a switch to my cd player like this:

    [​IMG]

    I already have the line coming from the battery because i needed it for the battery wire on the head unit to keep my settings. I want this setup so i can flip the switch to on, turn my car off, and not have the cdplayer turn off. I go to fast food places a lot and turn my car off while i wait, mostly because i have a loud muffler and i dont want to be an ass to the people ordering. My cd player takes like 10 seconds to start playing again because its a mp3cd player and it has to index all the files. Would starting the car with the switch flipped hurt the head unit?
  2. mtlhead

    mtlhead Guest

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    no...but why dont u just turn off the head unit with the power button on the unit itself?

    edit: i dont think the switch is hooked up right though
  3. Striker1211

    Striker1211 New Member

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    I dont want to turn it off, i want it to stay on even when the key is not in the ignition, and i dont want it to turn off when the starter is engaged.
  4. mtlhead

    mtlhead Guest

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    ohh, my bad, i misread that then

    yea..it looks like it would work
  5. StealthStyle

    StealthStyle FEOA Member

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    It'll work, but you'll either need to flip the switch on and off every time you wanna use the radio, regardless of the ignition position, or just leave it set to on all the time. Your radio might drain the battery.

    BTW, certain headunits have the option of being turned on while the car is off. I know pretty much all of the Blaupunkt Skyline (7X) series can, and i'm sure some other manufacturers do as well.
  6. MadBrad

    MadBrad BYO Plastic cutlery

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    Putting 2 power sources together , I dunno, could blow something, not the radio. It's like taking the main feed out of your house power center, and the same from your neighbour's, and touching them together. Not sure what would happen.

    You could just power your radio's ign power wire from a source that is not controlled by the ign but on all the time, or wire in some kind of latching relay to do it the real safe way. You press a momentary button to engage it, shut down the car, then next time you start the car it resets so you don't accidentally leave the radio on later.
  7. jigsaw

    jigsaw New Member

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    ur schematics need a little more deatails... is the gray box supposed to be the HU? :?


    if so, the switch will not be doing anything where it is :lol:
  8. Striker1211

    Striker1211 New Member

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    Well if you connected two AC 120v lines together that would make it 240 and it would blow something, however DC is a lot less volatile. I thought that would work the way i had it, how could i fix it? I checked and the radio wont turn on with the car off, its just a jvc head unit nothing special. This is how i thought it would work: When the car was off the switch could be turned on to send power to the ignition, when the car was on the switch could be off since the ignition would then feed it, and even if the switch was on it would just be positive connecting to positive which i figured couldn't hurt anything, since it would just be in series. Help?

    Grey box is battery.
  9. wicked1706

    wicked1706 New Member

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    the only problem i see is you risk draining ur battery if you forget to turn it off. other then that, just make sure you dont short anything out and ul be fine!
  10. MadBrad

    MadBrad BYO Plastic cutlery

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    120 + 120 only adds up to 240 if they are from 2 different phases. It's not really adding up, it's 240 between them, and they would explode, I thought more about it. They don't have any overcurrent protection until they get to the panel in the house. If they are from the same phase it's like they aren't there. There are 3 phases in the transformer. 2 of them go to your house. It's 240 BETWEEN them, not added up.
    Anyway, Speaking of overcurrent protection, you would need some in that new wire of yours.
  11. MadBrad

    MadBrad BYO Plastic cutlery

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    That's why I suggested using a latching relay that resets itself and a momentary button to operate it.
  12. onequikscort

    onequikscort New Member

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    why dont you just turn the key to the accessory position. its not like you are waiting long.

    chris
  13. MadBrad

    MadBrad BYO Plastic cutlery

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    Does that power not get killed when the key is in "start"?
  14. onequikscort

    onequikscort New Member

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    yeah it does i didnt see the 10 second thing. i would say just deal with it, its a few minutes while you are in the drive thru,

    i mean it is such a mundane thing.
  15. jigsaw

    jigsaw New Member

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    has it ever occured to u to just leave the key in the "acc" position when turning ur car off :?:

    is the same as ur idea, except less of a hassle
  16. MadBrad

    MadBrad BYO Plastic cutlery

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    Are you in the habit of just reading the first post? It's been covered.
  17. Striker1211

    Striker1211 New Member

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    Yeah i know it's mundane but i like switches :p
  18. MadBrad

    MadBrad BYO Plastic cutlery

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    I would remove the fart can and get your torque back ,then you can leave the engine on at the drive through.
  19. Striker1211

    Striker1211 New Member

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    Fart can? There is a hole in my header pipe and right before the muffler on the long pipe.
  20. onequikscort

    onequikscort New Member

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    well why dont you fix that instead of just putting a switch in. i wouldnt want to drive around with holes in my exhaust

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