natwx10 Posted April 30, 2014 Report Share Posted April 30, 2014 Alright guys.Looking for a little bit of help, fitting an after market stereo and having a bit of trouble.The stereo comes on as soon as it's plugged in (all the lights on it are on but you can't actually turn it on to use it).When you turn the ignition on it then turns on fully but when you take the key back out the light all stay on (i've tried leaving it 5 minutes or so but they do not go off!)I've tested the stereo in another car and it doesn't do this.Here's a picture of the wiring diagram on the top of the stereo:And here's the wires on the power plug:Can anyone tell me which i need to switch around?Thanks. Quote Link to comment Share on other sites More sharing options...
stator Posted April 30, 2014 Report Share Posted April 30, 2014 Usually you have to switch the Red and Yellow wires but the colours can vary greatly. If that's a standard ISO connector, and it doesn't look like it is, it would be the black/red/orange cable and the thick red cable you need to swap, but that doesn't look right to me at all, so I wouldn't do that. Quote Link to comment Share on other sites More sharing options...
Skezza Posted April 30, 2014 Report Share Posted April 30, 2014 Nat, buy a pc2-69-4 wiring harness. Fit, enjoy. They're a few quid off eBay. Quote Link to comment Share on other sites More sharing options...
natwx10 Posted May 1, 2014 Author Report Share Posted May 1, 2014 Nat, buy a pc2-69-4 wiring harness. Fit, enjoy. They're a few quid off eBay.One of these?I've tested with this harness, it does the same thing :/If the rule of swapping red and yellow stands though, that would mean i'd need to swtich the thick red and red/brown right? Quote Link to comment Share on other sites More sharing options...
Skezza Posted May 1, 2014 Report Share Posted May 1, 2014 I can't tell from that photo. The harness I mentioned is VW specific and is literally plug and play in a Lupo. I bought one four or five years ago on my previous Lupo and I still use it today. Quote Link to comment Share on other sites More sharing options...
stator Posted May 1, 2014 Report Share Posted May 1, 2014 Do you have a Digital Volt Meter? If so you could check the connectors to make sure they are correct. So swap A4 and A7 from your diagram if they are both showing +12v Quote Link to comment Share on other sites More sharing options...
Skezza Posted May 2, 2014 Report Share Posted May 2, 2014 I personally wouldn't touch the OEM harness.if you're going to mess about, get some bullets and look at the red and yellow on the aftermarket loom, possibly orange to. I have a feeling the reason you're getting the disco light effect is because the illumi wire is getting a constant live. That said it might be just the red and yellow, just doesn't make sense to me it being only that. Still, please don't butcher the OEM harness. Quote Link to comment Share on other sites More sharing options...
arosaSDI Posted May 2, 2014 Report Share Posted May 2, 2014 some of the looms didn't have a switching live, my mk1 arosa never had but my gti does. Get your multi meter out and check. As others have said don't cut the loom Quote Link to comment Share on other sites More sharing options...
Sp33dy Posted May 2, 2014 Report Share Posted May 2, 2014 had similar thing with my mk1 arosa, standard wiring loom looked bit bodged but ended up running a new switched live in Quote Link to comment Share on other sites More sharing options...
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