Can the cooling fan relay go bad and still work once in a while? I dropped my new motor in the 94 Cav, and upon the test start-up, the fan didn't come on when it was supposed to.
Under dash fuse was good, power is getting to the relay, power seems to get THRU the relay. The temp sensor looks like new, it still has white teflon tape on it's threads.
After playing around with it a few minutes, the fan came on, so I know the fan itself works, but it didn't seem to operate on a consistent basis.
The Snap-On computer was reading my engine temp the whole time, but once in a while, the reading on the computer jumped down to -58 degrees. Not sure what happened there, but could that be a faulty relay? Or maybe a characteristic of a wire going bad?