[SRGN]

Originally Posted by prostreet64

Thanks guys for the info. Will test some of these ideas first of the week. One other thing I had forgotten about is the 40A circuit breaker where the power comes in and then goes out to the 2 relays. Is there a way to test that breaker or just replace it and see what happens?

40a is a bit small for a cooling fan. I'd replace it with a 60A fuse or a 60a breaker minimum. If you go with a fuse, buy an extra to keep as a spare in the glovebox. If your current breaker is auto resetting after it trips, would explain the intermittent nature of the issue. Breakers trip from thermal/heat load, so make sure it's mounted away from heat sources as well. Breakers do wear out, look up the specs on your fan and see what the full load amp draw is. Whatever the rating, size at least 125% of that number. Fans draw a higher current when starting, far less to continue running once moving.