On a 5.3L with a 2002 truck computer that was set up by painless wiring it wasn't set for electric fans. I went in set it on "2 fans" and set up my on temp at 170 and an off speed at 55 mph. When it turn on at 170 the fan relay is always cycling, it sounds like a signal light flasher, and it will not turn off over 55 mph. Its a single fan and when i do a manual test the fan one switch turns it on and the relay does not click, It works properly. The fan 2 switch does nothing.
Anyone have any idea what is going on here?