Making headunit work without engine running

[gavin18787]

Hi just after a little advise really as ive just fitted my new headunit as i wanted one I could use with an Ipod. Its a pioneer P4900IB. Its all running fine and dandy but dosent work unless i have the engine running //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

I got round this problem with my old headunit (a JVC) by changing the position of the fuse on the back of the unit. However this unit only has one position for the fuse to go into.

I have also tried swapping the yellow and red wires over as show in the pic but this has not helped either.

Any help would be very much apriciated //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

Gavin

Click to read more...

 

[budget76 10+ year member]

My guess is whatever you tapped into for your remote wire isn't live when the ignition's on, but only when the car is running. Search for a different remote wire.

If it's the same as before, and worked before, ****ed if i know

 

[youngfu 10+ year member]

connect remot wire on the hu to the car's constant 12V wire

 

[AcidicDreams 10+ year member]

Here is the deal,

The yellow wire should have power all the time, directly from the battery if possible (I don't really bother, I just use the stock wiring)

The red wire should have power any time the key is not in the OFF position, which includes the accessory position where the electrical system is on without the engine running. btw: I'm talking about the red wire labeled acc

so use a multimeter to find a wire that has power when the keys are on acc or when the engine is running and it'll fix your problem

 

[AcidicDreams 10+ year member]

connect remot wire on the hu to the car's constant 12V wire

That would be stupid, then the deck would be on all the time and drain the battery unless you wanted to manually turn on/off the deck....

 

[youngfu 10+ year member]

You're right. I misunderstood OP's question

 

[Fear Of Theive 10+ year member]

You see the Blue and white stripped wire? IT should say system remote or something along that line..the other remote you have just like splice em all together and u got it (what i did) That should do it.

 

[gavin18787]

Ah cheers for all the help //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Previously it wasnt ideal as the headunit was always on and you had to manuely switch it off.

I will try and find which wire goes live when the key is in the acessory position, however i have a feeling none of them do as my last corsa didnt have this problem and the ISO just connected straight up and it all worked. May have to go for the permanent live thingy again

 

[sdmtnbiker420 10+ year member]

whoa, corsa, thats crazy. We dont have Opel here in the USA.

 

[gavin18787]

Right ive been having a fiddle today and am still none the wiser //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif

Connected up all of the remote wires as suggested and im still not getting anything unless the ignition is fully one.

Also out of interest I joined the yellow and red wires to see if i could get it constantly live and manually switch it on and off on the headunit (not ideal i know but better) This worked but when ever the headunit was on so were all the dash lights and fan etc so thats not any good either //content.invisioncic.com/y282845/emoticons/confused.gif.e820e0216602db4765798ac39d28caa9.gif

So im now thinking it is the accesory position on the ignition that is faulty. What is the best way to test it?

Cheers for all the help so far //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Gavin

 

[PSturmer 10+ year member]

just go to one of your cigaret lighters and take that power supply cuz i know thats constant power. thats what i have my ipod adapter connected to