Rear locker control international

[DVT873]

Yauchout. Short answer, add a manual air switch especially if you are the only driver. The main advantage of using Diamond Logic (DL) is that it will disengage it above a certain road speed. If you use DL you will need to add an air solenoid, usually on the board that has the suspension dump and 5th wheel unlock solenoids. You will also need to find and activate the feature code for the diff lock. Also if you have blanks on you 6 pack you need to pop the cover off and see if there are micro switches under that cover. Pop an actuator out of a position being used and you will see what I mean. Early on a six pack had 6 live positions. Then they realized people were adding features for "free". They started limiting the positions.

I assume you mean an actual locking differential. You should already have a power divider lock switch.