In Reply to: Proofmeter posted by Jim on August 13, 2020 at 14:10:12:
The 8N only used one Proofmeter, p/n 8N-17360-A, 50-52. There is a one for the 4-Speed that fits the 600-4000 tractors, p/n C3NN-17360-N, 53-64. You may just have the wrong cable. You need p/n 8N-17365 with the 8N Proofmeter.