Hi,
The idea that it happens when cold leads me to believe it isn't the box, but rather a connection.
I have one more relay for you to check. The vehicle is equipped with an automatic shut down relay (ASD). It is in the fuse box as well. Switch it with a different relay with the same part number and see if that makes a difference.
I attached a pic below showing location in the power distribution box.
Do the same as far as checking the connections for this relay as well.
Let me know.
Joe
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Saturday, December 19th, 2020 AT 3:26 PM