right havin a slight problem tryin to fit a stereo in ma mk3 polo j reg

pioneer headunit out of ma mates x reg bora wont work in mine tried switching the wires round and still nothing tried it n ma dads mk2 golf n it worked

any help would be grateful

Edited 2 December, 201213 yr by big nev

might need to join the yellow to the red.

Tried that still nothing :(

it might be your ignition live fuze there are two fuses that will cause your head unit to not work one is a 5 amp and the other is 7.5amp.

is there power getting to the ISO plug?

Fuse intact?

Have you tried it with the key in the ignition or in the ON position? (polo's dont have an ACC position)

I know the stock radio in mine used to turn off when the key was removed

Where r this fuses u speak of ? The one on the bc of the head unit is

Fine :( n I've tried it wi ignition on and wi just the key in

The fuse is under the bonnet on the passenger side of the engine bay, behind a clear plastic cover. If your cigarette lighter also doesn't work, that's a good sign that you've blown the fuse. If you have a haynes manual or the car's original instruction manual, it will tell you what fuse it is. There's only 16 and you can see 8 of them so I normally just take the others out one by one and inspect them.

fuse in fusebox? should be a 30amp.

Cigaretes socket works will chech fuses when I get home

There's power at the Iso connector so don't know what else todo

My mk3 has no ignition feed, I just had to connect both the red and yellow to the constant live from the ISO connector.