Diff locker relay - not hearing it

2015 trail edition. Locker was working before I had to swap engines. Now it won't engage. Red dash like just blinks slowly.
Does anyone know where that relay is located? It seems like the cheapest/easiest thing to try first.

 

There are a lot of conditions that need to be satisfied for the diff lock to engage.

 

With my 2022 Off-Road, once that red light starts blinking then I have to essentially bring it to a complete stop. As soon as I do, the locker engages. And it has to be in 4wd Lo Range.

 

I haven't exercised mine in a while but I thought you had to be at a complete stop to engage? I didn't think you could do it while moving.

Also, from what I remember, you should turn slightly side to side to help it engage if a straight line doesn't do it (helps since the diff is actually working when turning slightly).

 

Why did you have to swap engines?

 

Matt83, I threw a rod. Might have been water got in the cylinder.

 

I disconnected the gray 6 wire plug on the top of the actuator to inspect it. Looked good so I reconnected it and now my 4 hi light is blinking as well as my multi terrain light, traction control light is on and so is my ABS. Shit keeps getting worse.