Thought it best to post this separately since a different issue from prior post dealing with Fan 1 Pin E8 (here: http://www.gearhead-efi.com/Fuel-Inj...or-Fan-1-Relay)

Hooked up a relay wrong and passed 12-13v to Pin F8 for a few seconds. Now when the Fan 2 enable temperature is reached, the voltage when probing Pin F8 is all over the map from 13+v to near zero, pulsing 3-4 times a second. If the wire from F8 is plugged into the relay, can feel the relay clicking 3-4 times a second. The fan runs, but not at full speed apparently because of the varying voltage it's being supplied.

Have I fried my ECM? Any other ideas? Thanks!