Champion fan relay, odd shutoff issue.

Hey guys, apologies for my delay Ive been putting in long hours through Texas! This might be a ramble but theres a lot of replies so I might as well...

Early this morning I wired in a manual on switch and the hottest the coolant got was 206deg cruising at 2700rpm on the interstate (got cooler if I went faster). It was ~94deg out west of San Antonio. Running the fan on the highway actually helped because I have horrible airflow through my rad with this flat champion shroud. It seemed cooler on the highway with no shroud and a flex fan. But this is by far the hottest weather Ive cruised in.

And the manual switch overcame whatever issue was causing it to turn off spontaneously, or never turn on at all.

I still intend to trouble shoot this issue once I get to home base in California. Not a huge fan of using a manual switch, or running fans on the interstate.

A lot of notes here that soothe my worries on the road. The wiring I have appears accurate! I'm still not sure the cause of the problem but if the fan sensor/switch were to blame that might also make sense given what Dana noted about cooldown... It was just very inconsistent overall (before the manual switch today). Parked and running in a lot after the highway ride the fans would not turn on...sometimes!

Anyway, I should be able to make it to California with the manual switch! and when Im there ill figure out the culprit and share it here. I hope.

Im glad most of yall dont think its the relay.