more digging and more information



this looks like the 4 prong connector. this kind of matches up with what I found earlier. but now, what does ECT (engine coolant temperature?), ICM (ignition control module?), ECM (engine control module?) mean?

This is what I found when I was metering out the wires:

#1 connected to EZL, gave a resistance reading when tested against ground
#2 ??? couldnt find
#3 ground
#4 connected to pin 21 on the ECU, could not interpret the signal

if ECM stands for engine control module signals, then that means prong #2 and #4 both connect to the ECU, and maybe it gives off a voltage or something to read the signal from the sensor?