Thread: D2a instrument panel light dimmer

Originally Posted by PaulMc0308

The wiring and connector for the dimmer control are only fitted to NAS and Jap versions of the DII.

It's pretty simple to add the connector to the loom.

The connector, as someone said above, can be found in Range Rover Classics, as well as most Austin-Rover cars of the 80's - Maestro/Montego - but, I'm not sure if you got those in Australia? (you weren't missing much, if you didn't )


It's a RISTS 3-way female TTS connector.

I recently made-up an add-in harness for the dimmer control, for a Swedish member of the D2 Boys Club Forum, to fit into his LHD DII.


These are the instructions I sent him -


Here are the pictures of connecting a Dash Dimmer Harness into the Headers C0759 and C0760 behind the Instrument Pack.

In the pictures, I'm using a RHD facia harness (and a LHD Dimmer Harness), I've 'flipped' the facia harness, so that it looks like a LHD one in the pictures.

The facia harness has also had some of it's binding tape removed, which is why it looks like a loose bundle of wires in places.





In RAVE, Land Rover number a connector's cavities from left to right on the front (face) of the connector.

So, for clarity, I've modified a Grey Header diagram, to show the cavity numbers from the cable-entry side of the connector -





We'll start with C0760





Pointing at cavity 12, which is one of 4 terminals on the LG sub-circuit (Instrument Pack Live) - we'll avoid connecting to this





Pointing to cavity 3, where the dimmer's earth will be connected to -





Next three pictures - Inserting the Dimmer Harness earth terminal (Black wire) into cavity 3, note the orientation of the terminal -











Now C0759

Pointing to cavity 12 on the illumination feed circuit on Header C0759, note the empty cavity 11 next to it, we'll be using that cavity soon -





Pointing to cavity 13 on the switch and instrument illumination circuits on Header C0759 -





On non-dimmer vehicles, terminals 12 and 13 of are connected together by a loop of Red/Orange cable, this loop connects the illumination feed circuit (terminal 12) to the switch and instrument illumination circuits (terminal 13).

This loop also has a splice off of it, which powers the headlamp levelling circuit, via the headlamp levelling switch (more of this later)

On vehicles fitted with a Dash Dimmer, the dimmer's input and output go between terminals 11 (same sub-circuit as terminal 12) and 13.



We will need to release the terminal in cavity 13 - lever the splice cap away from it's latches on the connector body -





With the side of the splice cap lifted above the latches, hold the connector body and pull the splice cap with a pair of pliers, it may help to wiggle it, or pull from each end alternately -





Done





From the front of the splice connector - pointing to the terminal in cavity 13 (you can see the plastic retainer below it) -





Next 2 pictures - Depressing the plastic retainer to release the terminal -








Terminal released from cavity 13





The other end of the Red/Orange wire in the terminal removed from cavity 13, is connected to the terminal in cavity 12 (illumination feed circuit), which is also connected to the headlamp levelling switch (via splice A56 in the loom) to supply it's power for headlamp levelling. This terminal should be taped-up, to insulate it, and taped back to the facia harness -





Connecting the Dash Dimmer Harness

Insert the terminal on the Red/Brown wire with the Orange band (I don't currently have any Red/Orange cable) into cavity 11 on C0759 (note the terminal's orientation) -





Insert the terminal on the Red/Brown wire into cavity 13 on C0759 (note the terminal's orientation) -





Replace the splice cap onto C0759 -





Job done - you can now plug-in your dimmer control -





Paul.

1989 Arles Blue 2.5TD 110 Hardtop
1999 Epsom Green Discovery II 4.0 V8i 'XS'



.

Thanks, Photobucket, for ruining a very informative post. None of the pics here show anything that remotely resembles my car