ST60 Wind Speed Missing

[Humper]

HI
I have an ST60 installed on our sailboat. I has worked fine for the 4 years we have owned this boat. HOWEVER...last year it was not connected because the wires were stuck in the compression post in the cabin (long story). This year prior to mast stepping I spliced additional wire to lengthen the wire run. Now, new this year the wind speed only show 0.0. Wind direction is fine.
I searched this forum, and performed the following troubleshooting at the terminal strip beneath the mast compression post:

Red to shield should read 8 volts DC steady. This is the masthead power supply, coming from the ST50/ST60 display head. If the head is damaged, you may need to provide this power from another source to test the masthead.

Blue to Shield should read anywhere between 2 and 6 volts DC. This is the port side directional element. The voltage changes as the vane turns.

Green to Shield should read anywhere between 2 and 6 volts DC. This is the starboard side directional element.

Yellow to shield should read between 0 and 5 volts DC. This is the wind speed circuit. The faster the wind is blowing, the higher the voltage will read."

I do have the voltages as indicated above at all my connections. I did not test the back of the instrument, but did check them visually, and they appear normal.
Any other suggestions? It's a big PITA not having having wind speed ...

Thanks...John H