From the diagram, it looks like your R has an electric speedo. I thought that maybe they shared the same mechanical speedo like the 91-92 SE-R's. I'm not sure on that one.
I do have the resistances for the gas tank though.
Full = 4-6 ohms
1/2 = 28-34 ohms
Empty = 73-85 ohms.
The resistances should be measured between the outside pins of the 3 pin plug.
(1-(*)-3) <----- Basically between 1 and 3
Also, when my tach was not functioning, I tried everything. It ended up being my ECU. From my understanding: the tach signal travels from the coil, to the ECU, and then to the cluster. So, the signal from the ECU to the cluster is NOT the same high voltage signal that comes from the tach.
Anyways, on your car PIN 16 is the signal, and PIN 17 is the ground wire. The tach signal "should" be PIN 2 on the ECU. The wire labeled L/B.
I do have the resistances for the gas tank though.
Full = 4-6 ohms
1/2 = 28-34 ohms
Empty = 73-85 ohms.
The resistances should be measured between the outside pins of the 3 pin plug.
(1-(*)-3) <----- Basically between 1 and 3
Also, when my tach was not functioning, I tried everything. It ended up being my ECU. From my understanding: the tach signal travels from the coil, to the ECU, and then to the cluster. So, the signal from the ECU to the cluster is NOT the same high voltage signal that comes from the tach.
Anyways, on your car PIN 16 is the signal, and PIN 17 is the ground wire. The tach signal "should" be PIN 2 on the ECU. The wire labeled L/B.
