Head unit forgets settings

Steve M · 19 Jul 2009 at 14:01

Just bought an MG ZS 120+. I've connected my JVC stereo from my old Corsa and each time i turn the car off and on the stereo forgets it's settings (bass, treble ect). Also the radio doesn't work but worked fine in the factory fitted one i took out of it.

I've read that on the ISO block you need to change the red and yellow wires around (continious power supply) but there are no red and yellow wires coming from the car into the block? Is there an adapter or something i could get? It worked fine on my Corsa.

DannyW · 19 Jul 2009 at 14:16

its a problem with the permanent live

had this problem with my e36 just swapped the red n yellow around

Steve M · 19 Jul 2009 at 14:19

DannyW said:
its a problem with the permanent live

had this problem with my e36 just swapped the red n yellow around

Yes mate like i said though there is no red and yellow to swap round in the ISO block.

moss · 19 Jul 2009 at 14:27

Get a multimeter and look for the constant live and switched live. Use virtually any bear metal part of the car as an earth.

Janesy B · 19 Jul 2009 at 14:28

You'll need to find a wiring diagram and swap the equivalent to the red and yellow wires.

Steve M · 19 Jul 2009 at 14:30

This is a piccy i just took, can someone tell me which ones i need to switch? Also do they just pull out and slot back in?

moss · 19 Jul 2009 at 14:42

On the right hand connector, the black is likely to be your earth lead, the red/yellow and red/black are likely to be the lives and the blue/white is often an electric aerial switch. Don't take that as fact though, I don't want to be responsible for damaging your headunit

Steve M · 19 Jul 2009 at 14:50

I think it's White/Blue - Perm 12v, Yellow/Red - Switched Igntion, Red/Black - Night time illumination, Black - Earth. I cant get the wires out to switch them though!

Steve M · 19 Jul 2009 at 15:05

I've fixed it cheers everyone, just it was the fuse in the back of the stereo causing the issue. The radio still doesn't work though but i can live with that.

icyshore · 19 Jul 2009 at 15:15

Steve M said:
I've fixed it cheers everyone, just it was the fuse in the back of the stereo causing the issue. The radio still doesn't work though but i can live with that.

Have you plugged in the aerial, the corsa probably had a quick fit one that might need removed to allow the MG one to fit.