GolfGTIforum.co.uk
Model specific boards => Golf mk2 => Topic started by: new(ish)dubber on 12 October 2010, 22:06
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Up until now i've quite enjoyed not having a radio, but the time time has come to sort it out.
The previous owner said his head unit worked fine but i've tryed 3 i've got lying about and none of them work, i haven't really got any of the necessary tools for diagnosing electrical problems but as far as i can work out there's a problem with the live. Is there any common wiring issues i should check out before i go digging behind the dash ?
and btw i have checked the fuse haha
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Get your self a multi meter b4 doing owt else.... £2.81 on Ebay... http://cgi.ebay.co.uk/DIGITAL-MULTIMETER-MULTI-TESTER-CIRCUIT-TESTER-/280551804672?pt=UK_BOI_Electrical_Test_Measurement_Equipment_ET&hash=item415230cf00
Radio is very simple to wire - Live & Earth and then it should power up!!
Speaker wires & Ariel
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theres something to do with the live and memory wire or something like that. Like you have to put them together or something.
Thats probably no help but someone might know what im on about and clear it up :p
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vws have the live and accessory live wires back to front compared to the industry standard, plus the mk2s didnt even have an accessory live until right at the end of production.
check your head unit loom, most new ones tend to have bullet connectors on the red and yellow wires which you can swap round to make it work on a vw plug. the other thing to note is that for some strange reason the industry standard wire color for the permanent live is yellow, and the accessory live is red. whereas vw use red for the permanent live and red/brown for the key-in-ign live (if fitted)
some stereos have a double connector on the yellow wire so you can connect both the live and ign live wires together to power the unit up, just means it wont switch off when you take the key out. can always add your own accessory live, where is your hazard switch, dash or column?
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vws have the live and accessory live wires back to front compared to the industry standard, plus the mk2s didnt even have an accessory live until right at the end of production.
check your head unit loom, most new ones tend to have bullet connectors on the red and yellow wires which you can swap round to make it work on a vw plug. the other thing to note is that for some strange reason the industry standard wire color for the permanent live is yellow, and the accessory live is red. whereas vw use red for the permanent live and red/brown for the key-in-ign live (if fitted)
some stereos have a double connector on the yellow wire so you can connect both the live and ign live wires together to power the unit up, just means it wont switch off when you take the key out. can always add your own accessory live, where is your hazard switch, dash or column?
see :p
Thats what I was on about ;)
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Still need a tester to check that there is power in the 1st inst....
Before ripping the wiring out the dash!!
Stevie Wonder Wiring School Strikes again!!
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vws have the live and accessory live wires back to front compared to the industry standard, plus the mk2s didnt even have an accessory live until right at the end of production.
So could my 1990 (hazards on the column) have an accessory live? It has factory ISO plugs.
If not is it possible to connect one that dosn't require the ignition lights to be on?
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i couldn't find a an earth so i ran a new wire through for that, i've got no power coming through ign. live or constant live, what's the best thing too do next ?
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no 90 isnt late enough, talking late 91/92 models.
you can add the key-in-ign live easily though, find a mk3 or passat or something in the scrappy and look at the ign switch pin S or SU for the brown/red wire. follow this back to a square 1 pin plug, chop that then remove the wire from the ign switch using a thin screwdriver to release the locking tab. then simply pop it back into your switch in the right spot, splice the wire to the right pin on your stereo plug :)
if you need the pin for the stereo plug you could steal that from the donor car as well, or chop the yel/white or blue/grey wire off your mk2 plug, then pop it out and move it to the ign live spot once you splice it on the end of the brown/red wire. the pins in the stereo plug are the same as loads of the plugs in the bay and fusebox on the later cars too, so endless places you can pinch one from :)
blue/white is lights on feed, and yel/white is speedo signal, neither of which are required on modern stereos.
if you're as anal as i am, you could strip the entire red/brown wire out of the donor car without cutting it then fit it to your car, but you have to have a fair bit of wiring OCD for that :grin:
on the passat/mk3 the wire runs to plug H1 pin 7 before going off to the stereo, so that pin will need popping out too. (see my fusebox faq for more info on fusebox pins)
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I found that when I fitted my Head Unit properly i.e. with a switched and non switched live, that it stopped the battery going flat in a couple of days - this also happened with the same model head unit when I fitted it to my Audi....
I tapped into one of the switches on the dash to get the switched live as all this does is turn on & turn off the headunit when you take the key out of the ignition.... Very useful just like the lights on buzzer, to help avoid the flat battery in the morning syndrome!!
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Sorted it in the end. Managed to find the accesory live floating around in the back of the dash somewhere, ran another nice thick earth straight to the battery and all is well. God knows what was going on with the wiring before, the constant live was split into 2 behind the column and then went into both lives on the back of the loom
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Sorted it in the end. Managed to find the accesory live floating around in the back of the dash somewhere, ran another nice thick earth straight to the battery and all is well. God knows what was going on with the wiring before, the constant live was split into 2 behind the column and then went into both lives on the back of the loom
:cool: