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Mk 4 Headunit help.
Posted: Mon Apr 18, 2005 5:15 pm
by urz
(I searched for this and couldn't really find what i was looking for)
When ever i take the keys out of the ignition the headunit forgets all the presets and spits the cd when i put the key in the ignition. It is obviously not wired correctly, does any know how to over come this?
Thanks.
Posted: Mon Apr 18, 2005 5:48 pm
by ste mk1lx
if it's an aftermarket head unit you need an adaptor loom available from Halfords and other motoring store's HTH
Posted: Mon Apr 18, 2005 6:09 pm
by carmadaaron
yes, u need an ISO connector from halfords £13.49

Posted: Tue Apr 19, 2005 5:37 pm
by urz
Thanks. I just brought one but one end of the iso doesn't fit into the cd player (sony). Do i need another lead that comes from the cd player and fits into the iso?
Posted: Tue Apr 19, 2005 6:41 pm
by carmadaaron
it should fit on, as it is ISO...
remember its male-female plug.... not male-male
hope u know what i mean
Posted: Tue Apr 19, 2005 8:02 pm
by GroovyCarrot
I believe all you need to do is switch over the 12v permanent and the 12v ignition wires. It's what I had to do in mine, I think it's just a VW thing that they have to be awkward and reverse a bit of their wiring.
http://www.installdr.com/Harnesses/VW-Wiring.pdf
^ Radio wiring diagram, very, very useful. You want to swap over wires L and O.
Posted: Wed Apr 20, 2005 9:09 pm
by cruisin_chris
also needed this, dnt really wana pay for adapter that just swaps the wires when i can do it myself now, thanks for guide groovycarrot,
