I have a 5.3 in a 92 fullsize.
I have added a single electric fan.
I have it connected to what I understand to be the high speed fan signal (red connector #33). I had to add the pin to the truck pcm
Also from what I can tell the fan should come on at 200 and off at 195. (so my tune file says)
I get nothing when the truck heats up.
I also had the a/c wired to kick the fan on when the compressor was engaged, but I am getting nothing.
Anybody have any ideas.
I have a 75amp relay with constant 12 volts entering pole 30
(87) to the fan
(86) to a ignition on 12 volt source
(85) pin 33 red connector on the pcm.
Any ideas why this isn't working.