Hello!

This would be my first post to bimmerboard.

I am in the process of retrofitting a standard BMW nav system (e46 4:3 monitor, Mk3 GPS and BM24 radio) to my Rover 75. And to keep the challenge high and costs low ( we don't count work hours here don't we) I thought I'd try to build my own wiring for the system.

I sourced some connectors from a donor e46 (they were cut off the existing loom as the breaker definitely did count work hours) and I am now sitting here with a bunch of connectors. I have googled up some excellent wiring and connector pinout diagrams for the project but there is already some confusion that I need to clear up concerning the blue connector that connects to the nav computer:

The only connector the breaker sent me (they are car breakers not ICE experts) that fits the blue connector on the Mk3 doesn't exactly match the pinout I googled. I suspect that that is because that the plug in question rather is meant to be plugged in the video module than into the nav computer. I do NOT have a video module.

The connector I have has RGB ground shield on pins 14,15 and 16 and the RGB signal leads are at 4, 8 and 13. This is where the confusion starts: The first pinout I googled states that the RGB signal pins at the nav comp end should be 5, 6 an 7 (on the other row directly opposed to their respective ground leads. The I found another PDF that indicates that if you do not have a video module, the connector with signal leads at 4,8,13 shoud be plugged in to the nav comp directly instead of going to the video module.

This is where I found the pinouts:

What gives?

I do actually have more excuses to hang around at the bimmerboards: My other car is a beuatiful 1990 325ic. :)

Best regards,

/Erik

/Erik

• Building nav loom from scratch - pinout confusion - biggles 2008-03-15 11:28:45 (233 views)
  • This is what your harness shoud look like when your done? (pic) - Lyonsden1980 2008-03-27 19:58:51 (126 views)
    • Sorry, I thought you had a BM54 radio :( - Lyonsden1980 2008-03-27 20:02:26 (39 views)
  • Re: Building nav loom from scratch - pinout confusion - biggles 2008-03-26 06:43:52 (58 views)
    • Yes, the voice out from the nav is regular, line level, analog audio - Brian 2008-03-26 07:13:32 (33 views)
      • So is it preferable to use twisted cables instead of coax? (nt) - biggles 2008-03-26 08:34:24 (38 views)
        • I have no idea. - Brian 2008-03-26 09:12:52 (38 views)
  • Why don't you refer to the retrofit instructions? - kiwijochen 2008-03-16 03:16:36 (89 views)
    • That was actually what I did - biggles 2008-03-16 08:31:27 (65 views)
  • Re: Building nav loom from scratch - pinout confusion - saft6luck 2008-03-15 16:08:53 (78 views)
    • Re: Building nav loom from scratch - pinout confusion - biggles 2008-03-15 22:08:20 (68 views)
      • how to connect a PC - saft6luck 2008-03-16 04:07:35 (91 views)
  • Those pinouts are correct for your MKIII (url) - Brian 2008-03-15 12:09:33 (134 views)
    • Re: Those pinouts are correct for your MKIII - biggles 2008-03-15 12:15:22 (81 views)
      • The pins shown in the link (5, 6, 7) (nt) - Brian 2008-03-15 12:17:36 (97 views)
        • Sorry, I missed the link. Thanks. (nt) - biggles 2008-03-15 12:21:30 (77 views)