Speedometer / odometer troubleshooting


I’ve got a 1992 4-runner, manual deluxe, engine 3L.

My speedometer and odometer are both not working. I’ve checked the sensor and that is fine. Wondering what is the best way to go about narrowing the issue down in the gauge cluster or sensor -> gage wiring.

Any suggestions would be very welcome, had a go checking the continuity at the back of the cluster and the + S GRND and 4p are all continuous to their pins. Only weird thing is that the 4p bolt doesn’t have any input pin (under the B header).

Any help, or ideas as to what the 4p should connect to would be amazing, (Ive attached a partial meter diagram if anyone has the full one I would be very very grateful if you would attach it )

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