diff lock light

[thomson]

I have tried with out success to get a wiring dia for the Perentie .My diff lock light does not go on . it has one blue /black wire going to the switch ,which does not have voltage ,motoring running or stopped , and does not have an earth . I have tried to track it back to the fuse panel , no luck .Does anybody out there know the system . thanks Peter

[Phil B]

Have a look on the REMLR web site in the "library".
All the wiring diagrams are there.

Good luck!

[Homestar]

Hi Peter, the Diff lock on an LT95 gearbox is vacuum actuated so engine must be running to engage it. The actuator is located on the RHS of the box - it looks like an overgrown vac advance unit off a distributor. The switch which activates the light is directly above this unit - if you find it, you'll see what I mean.

Check to make sure you have vacuum at the actuator and that the diff lock is actually engaging. I am assuming (but not sure) that the switch would switch the B+ supply, so with the ignition on, you should have one side of the switch with 12 volts on it, and the other side should come alive when the diff lock is engaged (engine running).

My first thought is maybe the diff lock isn't actually engaging - I have had that issue on my of my LT95 boxes before.

Cheers.

[weeds]

My guess is the wires would run back the to vacuum switch on the dash or maybe a switch on the gearbox.....it would more than likely be fused with all the other dash lights as I don't recall the diff lock being on its own circuit.

[thomson]

I have traced the black blue light to the dash warning light module , tested the lamp OK , but it does not seem to be getting power , it seems to me the whole module is powered and each lamp supplies the earth . looking at the dia it says something called the Volt BD relay gives the power , what is this relay and were is it?

[thomson]

On further trouble shooting it looks to me that power { from where I don,t know} flows though the dash light and finds an earth through the switch .On the back of my light module the printed circuit is very untidy .I tried to find a new one ,without success . So I found a instrument shop that says they can replace the circuit .If anybody has a second hand light module , please raise your hand.

[rar110]

Mm. I think I still have one. I'll check.

[thomson]

well after ringing 3 landrover spares people and being told , you cannot get anything new .I was on my way to an instrument shop to have a new printed circuit board made ,and I called into T R Spares in Padstow . He pulled out his old micro fish and found the part number (AEU2721) for the printed circuit board , and will have the part for me tomorrow and as long as it works with the Perentie extended display I hope Iam in buisness.

[Bearman]

well after ringing 3 landrover spares people and being told , you cannot get anything new .I was on my way to an instrument shop to have a new printed circuit board made ,and I called into T R Spares in Padstow . He pulled out his old micro fish and found the part number (AEU2721) for the printed circuit board , and will have the part for me tomorrow and as long as it works with the Perentie extended display I hope Iam in buisness.

Sorry, a bit late coming into this but the lamp or bulb should have power coming through it all the time when the ignition is on. When you engage the centre diff lock it completes the circuit to an earth lead that bolts to the transfer case from one terminal on the switch on the vacuum actuator. Pull the bulb out of the pc board and check if there is voltage on one side of it. If there is none then pull the connector out of the complete pc board and sandpaper the contacts and try again. If you now have power at the bulb and still no light when engaged it is either the switch or the earth lead. With a multimeter check the continuity of the switch when engaged and disengaged. You can then narrow it down to the switch or the lead. Are you sure it is actually engaging 4wd when you pull the switch - if not that would explain why no light. Could be the vacuum actuator is stuffed and why the light is not working. The switched do stuff up occasionally. Hope this helps. Brian

[thomson]

With the switch removed I can see the arm move when you pull the knob , do you know where the power comes from ? I hope I do not need it now I have the circuit board coming but I have found a replacement for the light assy part number AMR2628 if you go onto paddock spares site and type in that number you will see it .Your suggestion of takeing the lamp out and checking for power/ earth is a good one and would have save me a lot of time and a better understanding of the system

Sorry, a bit late coming into this but the lamp or bulb should have power coming through it all the time when the ignition is on. When you engage the centre diff lock it completes the circuit to an earth lead that bolts to the transfer case from one terminal on the switch on the vacuum actuator. Pull the bulb out of the pc board and check if there is voltage on one side of it. If there is none then pull the connector out of the complete pc board and sandpaper the contacts and try again. If you now have power at the bulb and still no light when engaged it is either the switch or the earth lead. With a multimeter check the continuity of the switch when engaged and disengaged. You can then narrow it down to the switch or the lead. Are you sure it is actually engaging 4wd when you pull the switch - if not that would explain why no light. Could be the vacuum actuator is stuffed and why the light is not working. The switched do stuff up occasionally. Hope this helps. Brian