My early MKIV is at 4-1/100 with no trouble. I have posted all MKIV P/N info links on this forum tonight. 22 P/Ns. There are 2 more but I'm not sure they are real.

Hey Guys. UPDATE: I purchased the MKIV and I have the two connecting cables. Question: Most of the reconnecting is simple (as I just have to match colors), but on one of the connection plugs, there are 3 black wires on it. Does any one know what each is? or better, if anyone knows where I can find the wiring diagram for the Navigation harness?? I've seached this forum and others with no success.

I have full wiring diagrams.

But just tell me plug colour and pin numbers of the 3 wires, and I'll tell you what goes where.

Hey KiwiJochen. It is the blue plug. I apologize for not knowing how to remove the housing unit for the plugs, so I cannot tell you the pin numbers right now. What I can tell you, is that the 3 black wires I am trying to figure out, actually are connected to a smaller black (1) and clear (2) cable which is connected by different colored crimps. The colors are red, white, and blue.

Blue plug wiring:

Pin assignments at plug connector X1313

Pin Type Description / Signal type Connection / Measuring notes
1 E Voltage supply terminal 30 Fuse F75

2 Not used

3 E/A I-bus signal line I-bus connector

4 E Navigation video signal, red Video module

5 Not used

6 Not used

7 Not used

8 E Navigation video signal, green Video module

9 A Audio signal AF+ Radio

10 M Ground Ground connector

11 Not used

12 Not used

13 E Navigation video signal, blue Video module

14 Not used

15 M Shield Video module

16 Not used

17 E Synchronisation signal Video module

18 M Audio signal AF- Radio

These diagrams should help you. If you need more info, just ask.

Attached Images

	F__release_us_svg_sp_SP0000018838.pdf (43.9 KB, 259 views)
	F__release_us_zinfo_E53_SX1313A.pdf (10.4 KB, 248 views)

Thanks KiwiJochen and Terry! I will work on them later this afternoon and I will update.

Update: Good to go! It's up and working, but I feel that I'm not done with this problem just yet. Question: Along with the blue and red plugs, does there have to be another plug like an antenna wire plugged in?? I am still experiencing issues with static radio signals & the navigation is putting me way off the map (It seems to me that the Nav unit is not getting updates).

I believe I am missing something, because I still have a single wire that seems to have been cut also along with the cd connectors & Nav unit connectors.

You should have a black coax cable, around 3 or 4mm diameter, with an SMB coaxial connector on the end. This is the GPS antenna cable.

Needless to say, without a GPS antenna connected, the GPS won't get a GPs signal