Coolant temperature

[Waterloo]

A 2010? Should be a CM-871... Duh, I saw your looking at coolant... Oil should be running just a tad over 200 degrees. Water should, under normal conditions, be running around 180-185.

And owning a ProStar, replacing fuses and relays will do some odd things... But I doubt they would physically change your operating temps. I don't recall a relay for the dash cluster or gauges, maybe there was a resistance issue somewhere and the new fuses relays solved that. I don't know, these new trucks are a real adventure, and rarely a good one.