Thanks! So, reading through this, the essential parts are buried in a whole load of loom threading and messing around that we Aussies don't need to do! The instructions assume that we need to take the video signal from the camera to the UConnect, but our (Aussie) Laredo dealers have already done all that messy work for us. However, the loom that Aussie GC Laredo users get misses the essential wire that transmits the trigger signal to tell the UConnect to provide the moving gridlines!
Jeep, that's cheap! (And unsurprising).
So, 'all' we need to do is provide that signal. The trigger gets raised on pin 4 of connector D6685A (inside the tailgate on the newcam plug), and that needs to be sent to somewhere that LIN BUS CBC 3 is expecting it - this is circuit D403. (Note that I don't know if that signal gets raised on the crapcam - I never tested it, so YMMV with the following).
In the PDF instructions, connecting into the LIN BUS is achieved at Step 46 - where the BL (blue) wire is connected into pin 45 on connector D3806E in the engine bay.
But there's a quicker way.
that the D403 circuit is also available at connector I5010 which is far more conveniently located next to the passenger's foot inside the cab (this is on the LHS in Australian GC's) - so no need to do all that messy tunneling into the engine bay through the firewall!
If you look up D403 on TechConnect
(use Chrome!) you can see all the locations where that circuit goes meaning that you can tap into it anywhere it's available - the best place being at InlineBody/IP 2 Connector Pin 27. So, that's what I've done...
Proof is the picture I've attached.
FWIW, the following are red herrings as far as Aussie Laredo users are concerned:
- Step 27 says to plug the 2 wires into pins 8 & 9 - this has essentially nothing to do with the camera since these wires provide power to the license plate lights.
- Step 60 is all about providing the composite video signal (and shield) to the back of the UConnect: Pin 31 is Camera Signal, Pin 32 Camera Return & Pin 33 is Shield. Again, we (Aussie) Laredo owners don't need to do this, because the loom carrying the composite video signal from the camera to the UConnect input has already been fitted by the dealer at delivery - along with the crapcam.
Oh, and a tip for connecting the wires: Don't use those scotchlok or blade connectors - they work themselves loose or don't make a connection properly in the first place which is a PITA for diagnosing possible problems. Either solder the wires properly (irreversible) or do what I did and (this sounds stupid but is very effective) solder a paperclip arm onto the end of your connecting wire and put heat-shrink over it, then gently push this into the relevant connectors with the original pin. Once it's snug and firm, you can cable-tie the line to another part of the loom. This way, whatever you've done is reversible.
OK, that's about as much 'electrical engineering' I want to do for now...