No A/C... I have changed the coolant temp sensor, A/C pressure sensor. While charging the system, my low side pressure continues to climb near 120 psi, (and the high side matches); however the clutch never engages to cycle the coolant. I have checked for voltage to the compressor: none. Aux fan does not run. I have checked the continuity across the clutch to ground: OK. My A/C pressure switch (new) shows 5 volts on the reference voltage, ground is good, signal wire shows 1.3 volts. Any Suggestions?