Head unit replacement - harness connector photos (or pinout)?

[samcrxss]

Hello all!

New to the forum - and new to the Ibiza Mk2 also. I'm looking to replace the stock head unit with another I've got lying around, but I'm not sure which ISO adapter I need to get. I'm away from my car until the 29th so I can't look for myself yet.

Would anyone happen to have a photo of the connectors for the stock head unit, or a pinout diagram that I can try and match with the harnesses I'm looking at?

Currently, I'm thinking of getting one of these. The Halfords one is more expensive - just for a brown (steering control/dimmer?) connector which I'm not sure I need.
- CT20VW07
- CT20VW02

I appreciate any guidance!

 

[samcrxss]

After much scouring, I found two images on a German second-hand website, showing the back of the WKC 5201 RDS used in the Ibiza Mk2!

So now I know what the connector looks like... But I don't think the Halfords adapter will use the same connections.

I also found this in the manual...

A1 = Speed-controlled Vol
A2 = Phone connector (male) (for CB radio/phone activity)
A4 = +12V ignition
Connect to car Terminal 15 to switch with ignition, Terminal 30 otherwise
A5 = +12V switching voltage output
A6 = Instrument illumination (headlight/dimmer)
A7 = +12V constant
A8 = Earth constant

B1 = R RH+
B2 = R RH-
B3 = F RH+
B4 = F RH-
B5 = F LH+
B6 = F LH-
B7 = R LH+
B8 = R LH-

C is used for Line Output, aux, and CD changer
C1 = R L+
C2 = R R+
C3 = GND
C4 = F L+
C5 = F R+
C6 = Switching voltage for booster (0.3A max.)
C7, C8 = Service
C13 = CD bus control line
C15 = CD bus GND
C16 = +12V for CD changer
C17 = Switching for CD changer
C18 = CD-audio or aux-audio GND
C19 = CD-audio L or aux-audio L
C20 = CD-audio R or aux-audio R

Time to try and match these up to a harness. Having a look at the harness on my new head unit (the ISO one...), it looks like every single pin matches with the factory head unit. So I may not need to buy another harness at all! Looking at the Wikipedia article on ISO wiring, and the associated pinout guide, I'm pretty certain I don't need a harness after all. That's good to know.