Sorry for the delay in following up, various house DIY projects intervened. I tried to use my old multimeter to get a resistance reading, but the values were jumping all around. I ordered a new multimeter and CHT sensor in the meantime. With the new multimeter, I measured 2.5k ohms for the existing CHT sensor and 2.5k ohms for the replacement sensor, oh well. I nevertheless removed heater elbow as the next step in the process of replacing the CHT sensor, and think I uncovered the problem.
The top connector is for the CHT sensor and if you look at the bottom connector, a portion of the end is missing, exposing wires. Are the bottom two connectors for the speed sensors? Thanks in advance for your assistance.