What happened to my Mopar electronic ignition orange box

Post a photo of the back side of the box.

Back in the day I worked on Steel Case office furniture. The light fixtures had foam tape on the backs of them. After years of getting hot the foam tape would turn to tar. What a mess!

I suspect the pottant has had some chemical changes due to heat and fumes.

If the back side of the box is clean and you can see the electronics you could get some pottant, (3M DP190 is one I have used comerically) and report the box.

There are others and talking to 3M you might be able to find one that might be better suited.