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Land Rover XYZ Switch Disco (ZF) Wire Diagram

ZF 0501 209 718 | LR UHB100190

Black Common 12V (input)
Green GROUND (input)
Blue 12V (used only for Reverse Signal Input)

Grey (W)
Pink (X)
Yellow (Y)
White (Z)

RED (Park/Neutral)
Brown (Reverse)

Gear position switch
The gear position switch outputs signals that are related to the position of the selector lever assembly. The switch is installed on the selector shaft on the left side of the gearbox.

Slotted mounting holes allow the switch to be turned relative to the shaft for adjustment. A fly lead connects the switch to the vehicle wiring.

Movement of the selector lever assembly turns the selector shaft, which operates six pairs of contacts in the switch.

The pairs of contacts are identified as the W, X, Y, Z, Park/Neutral and Reverse contacts.

When closed:
The W, X, Y and Z contacts output a 12V ignition supply.

The Reverse contacts output a 12V ignition supply from the passenger compartment fuse box.

Park/Neutral contacts output an earth.

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New Transfer Case LT230 (1.2 Gearing)

SCORE! Well kinda…my truck has a 1.667 Transfer Case and with the planned re-power I knew I was going to need lower gearing.

Contacted Ashcroft to inquire about re-gearing the damn thing instead of spending the $1600 to get a new TC (rebuilt) with the correct gearing… Things were good until Dave asked for the serial number, and that’s when the plan hit wall. He determined that not only was I going to need the new gears, but there were two other gears that were required…well that took the cost to over $1000. Better to get one from them at that point…

WELL… I was talking to my neighbor about the loose dog that was wondering the neighborhood when he mentioned that he got a part he has been needing for his NAS90, he had picked it from the local pick and pull from a Disco 1…Didn’t think anything of it…then I was like, wait…There is a Disco 1 at the pick and pull?

A couple hours later I have a LT230 from a Disco 1 with the 1.22 gearing…FOR $145…sure it might need a rebuild, but way better than spending the $1600.