The issue is the radiator fans do not run (federal 94 S4 with A/C) either at temperature (>92) or when the A/C is turned on (this may be misleading as its possible there is no R12 so the low-pressure switch may be stopping it from energizing?) Regardless they should work at temperature, so:Checked all fuses and relay bases for heat damage/loose connections-all good Tried swapping relays, no difference.Removed the AC request relay (I'm not sure if running in diagnostic mode energizes this one) The rear AC relay is in.Jumped pins A-B on the ALDL connector, fans do not run with ignition off o