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Fan motor is good, relay is good. Ac is good and comes on. When the Ac is off at the fan relay connector I have batt voltage on both sides of the coil, power and gnd on the switched portion. When Ac is on, I have batt on one side and 1.7v on the other. What element actually applies ground when Ac is on and compressor engaged? Schematics include both fan switches, the ecm and the fan timer as all being possible grounds, so I’m not sure where to begin Also tried checking the timer but results are the same across all 3 timers I have. Additionally have noticed that shorting the connector from thermo sensor B does not bring on the condenser fan.
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Normally, the ECU provides ground to the relay to turn the fan on. If you manually ground the wire to the relay, it should turn the fan on. You may have a bad wire going back to the ECU, or the ECU is bad.
Relay turned out to be bad, spare I swapped with was bad, got lucky on the third relay. All 3 had continuity through the coil. Goes to show you can’t trust 20 year old relays
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