Does anyone have a circuit diagram or schematic of the 75 speedo? In particular the circuit board attached to the motor?
Anyone know how it works?
There are 4 cables that go into the board. The Red and Black are obviously 12v and GND, but what about the other two? can I assume they are the signal from the sender in the gear box?
I’m trying to find out what the signal looks like, is it a sine wave or a digital pulse?
Are here any electronic geeks out there that have pulled apart one and may know?
Anyone know how it works?
There are 4 cables that go into the board. The Red and Black are obviously 12v and GND, but what about the other two? can I assume they are the signal from the sender in the gear box?
I’m trying to find out what the signal looks like, is it a sine wave or a digital pulse?
Are here any electronic geeks out there that have pulled apart one and may know?