Central locking

[Tracks4x4]

Hi guys
I have an MY22 2500 6.7 Cummins.
I am about to add a service body to the truck, and want the central locking to work from the truck to the 4 x locks I am fitting to the body. Normally I would pull from an existing lock motor and create a lock and an unlock using 2 solenoids per action thus allowing the reverse polarity to open close, this method also isolates the aftermarket wiring from the hem wiring.
I tested the system with just a battery works great, then put it on the truck and it killed the central locking altogether! Once the system was disconnected from the car the central locking returned to normal.
I had a 2014 2500 before and I remember the autolec pulling his hair out now I see why from memory he had to add blocking diodes to get it working.
I only have 1 central locking motor to play with at the moment if I connect this directly to the cars wiring happy days it works!
So I have a couple of questions,
Does anyone have a wiring diagram showing from an existing door actuator to get this going
Or are most people just driving additional actuators directly from the car without isolating through relays? I spoke to an auto let today who says they never isolate they just add to the existing circuit.
All help appreciated thank you

 

[Ricktara]

Sounds like you are smarter than me but my 2 cents is the additional load makes the tipm think there is a short. Maybe you can find a way to connect a trigger to one of the locks that trips an additional relay so no additional load to OEM circuit.

 

[Travelin Ram]

Looks like the optional VSIM module has the function you need.

Here’s some links.

https://www.ramtrucks.com/ram-commercial/body-builders-guide.html

https://www.ramtrucks.com/BodyBuilder/service/Image?imageId=MtQrP/FqLY5r/est8MtGjGgHzAHGUTU0WB3rWuqSY7YmQ2vEhuBWBFZYAtkioJpY

If the truck does not already have the optional VSIM it’s probably easier to just use relays to isolate your additional lock loads.

You could likely use a switchpros 9100 or similar aftermarket power controller via the trigger inputs, but I would discuss it first with their tech support.

 

[BossHogg]

Look for an "up fitters guide", I know RAM publishes these but I don't know where you can find them. Perhaps a search or ask your dealer.

 

[Tracks4x4]

Thanks for the response, sadly the truck did not come with the module, as I said I had it done to a 2014 just hoping some one has experience out there with this