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General => Car audio => Topic started by: Pete Taylor on 13 January 2007, 10:11

Title: Head unit losing memory
Post by: Pete Taylor on 13 January 2007, 10:11

I've just installed a sony bluetooth head unit into my mk3 golf gti i've just got, but every time i switch the ignition off the memory is lost from the head unit. Everything else seems fine. Apart from a couple of dodgey bits of taped up wiring, I found a connector in there too but wasn't sure what it was for. Seems it's from the back of the air con switch!! I'm really not that great with wiring so any help would be appreciated!

Title: Re: Head unit losing memory
Post by: Pete Taylor on 13 January 2007, 12:06

I read on another post that swapping over the red and yellow wires does the trick, i'm guessing these wires are on the connector i got with the head unit that's inbetween the standard vw iso block and head unit? I'm at work today so I can't go mess around with it!

Title: Re: Head unit losing memory
Post by: Ozz on 13 January 2007, 12:08

Hi mate, the red wire is your permanent live, the yellow is your switched live (12v when the ignition key is turned). Swapping them over is supposed to work but I have always wired both red and yellow wires from the radio into the red wire from the car, so that you can use the radio without the ignition turned on.  :smiley:

Title: Re: Head unit losing memory
Post by: Pete Taylor on 13 January 2007, 13:29

Sounds good but i'd be a bit worried about the battery dying! I've got some rear door handles off a 5 door to put on the front to get rid of the locks because of them pesky kids having a go at it, if the battery dies i'll be scrambling through the boot!

Title: Re: Head unit losing memory
Post by: tommk3cab on 13 January 2007, 17:54

as long as you take the face plate with you you shouldnt have a problem, assuming you have one.

Title: Re: Head unit losing memory
Post by: Pete Taylor on 13 January 2007, 17:56

Good point..

Title: Re: Head unit losing memory
Post by: Chidub on 17 January 2007, 20:57

I had the same problem on mine. As said above I joined the switched live and the permanent live to the main 12v from the car and now just pop off the face plate when I park up. However, I had the same problem on a friends fiesta and turned out the switched live and the permanent live were the wrong way round. It might be worth testing with a volt meter as you switch the ignition on and off to check they are all joined in the right places.

Title: Re: Head unit losing memory
Post by: Bluefox on 21 January 2007, 21:33

Easiest fix is to switch the wires around if you loose memory, as mentioned... it's so simple it's not even worth getting the miltimeter out...
Incidentially, I've always wired up my stereo's in such a way that they're always on unless I take the face plate off. Originally, to persuade the mrs to remove her face plate... but more recently to remind me. I've been known to remove the mp3 player and go shopping, leaving the stereo playing nothing happily :rolleyes:

Title: Re: Head unit losing memory
Post by: tommk3cab on 22 January 2007, 21:55

oh my stereo is never playing nothing trust me!

Title: Re: Head unit losing memory
Post by: billy_vw on 22 January 2007, 22:08

just swap the wires round and hey presto :wink:

Title: Re: Head unit losing memory
Post by: yabbie on 24 January 2007, 21:05

its losing the setting cause when you take you keys out there is no constant 12v feed too the stereo at least this was my problem i took the main live from the lighter and wired that to the stereo and i dont have any problems now ive got a mk3 gti so the thin brown and red is the switched and like i said take the lighter live for the stereo hope it helps.