Re-wiring NATO Socket to INT2

[Tom D]

So I did this today.
I had asked Lynn Calder about altering the software but if that happens it will be a while off and I need the NATO to charge my trailer battery on our upcoming trip to Montenegro. So I have wired it to INT2 instead.

Here's how.
The NATO/Winch switch goes to the BCM and then to a relay under the back seat, from that relay the signal goes to the two big relays under the bonnet and in the RHS front wheel arch.
I had hoped to grab the signal from INT2 at the fuse which is also under the back seat but unfortunately the fuse is before the switch and so is permanently live.
So I picked up the INT2 wire from the LHS footwell, removed some trim and ran it along to the signal wire of the small NATO relay. It means that I have lost the use of INT2 but I don't really think I need it.

The advantages are that I can power the NATO socket at any speed, which I will need as the 300Ah battery on the trailer needs a lot of charging! I will also be able to use the winch without the engine running which could be handy in an emergency. It does mean that the winch could be used in Park so I'll have to be careful not to damage the transmission. Nothing a bit of common sense can't solve.

If you want to do this the NATO small relay is in the picture, (it's the one I have removed) the signal wire is Purple.
The INT2 wires are located in the LHS of the LHS footwell pos

itive is also Purple..

 

[Tom D]

Actually it was wired to INT1, the dash cam is on INT2...

 

[internal]

Actually it was wired to INT1, the dash cam is on INT2...

Thanks for the correction, I was wondering if INT1 and INT2 are wired differently for right and left hand drive.
In my case (LHD), Int1 is also on the left-hand side.

 

[cdsvt]

I'm hoping to follow in your footsteps to make the rear high load circuit a charger for my Off Road Camper with an Andersen plug.

If I get the stock setup: the EXT4 high load switch (500 Amp) in the overhead panel turns on the high load circuit. The high load circuit powers the front stock winch (or winch prewiring) and rear Nato plug (or prewiring). One switch turns both of these on at once. There are two high amperage relays, one in the front bumper and one in the rear passenger cargo (behind the right side trim panel) . There is a small micro relay near the primary battery that the BCM triggers, that in turn triggers the two high load relays to close, letting power flow to the winch/nato plug, and likewise disconnecting it when the conditions are appropriate (preconditions: engine running, transmission in D, N, or R; vehicle traveling less than 80 km/hr).

Could I get you to confirm that this is how you went about modifying it:

• Spliced a wire onto the INT1 (or INT2) positive lead (purple wire) in the kick panel
• This extended purple wire becomes the 12v trigger wire to a socket in the micro relay under the second row seat that your finger is pointing at in the picture above

Question about the micro relay (switch relay) on FL04:

• Do you remove the micro relay since it is no longer needed: the purple wire extension is now the 12v trigger wire into the socket for relay pin 87?

or​

• Do you leave the micro relay: the purple wire extension is now the 12v trigger wire into the socket for relay pin 86?
• If you do this, do you depin the relay socket at 86 and repin with your purple trigger wire?

What becomes of the 500 Amp high load EXT4 switch if you do either of these things. Is it now just unused?

Benefits:

• Now that INT1 (or INT2) switch in the overhead panel gives you full on/off control of the high amp circuits in the front and rear of the vehicle
• This overrides the BCM logic including gear position and speed so they no longer do anything with shutting off the high amp circuits
• It is up to the operator to use their heads when winching (engine running; transmission in neutral/foot on brake when the winching vehicle; drive or reverse when self winching power assisted) rather than expecting the vehicle to have a mind of it's own and protect us from ourselves

I feel like I am missing something...

 

[Tom D]

I’m away at the moment but I can confirm that the relays stay in place. I cut and terminated the original signal wire and replaced it with the new wire I installed from ext1.
In terms of operation the nato and winch go live when ext1 is switched. The Original 500A switch now does nothing.

In the future I might run a wire from the under bonnet outlet to g to e winch solenoid so that nato and winch can be separated.