1969 roadrunner tach

[paul1969cars]

Just installed postage size tach in factory slot in dash.

Has two wires off back of dash. One is for coil on negative side

I assume the other wire (blue wire) is constant power or switched power?

Thanks

 

[Black_Sheep]

Should be switched power, the FSM shows it going to the fuse box.

 

[paul1969cars]

Should be switched power, the FSM shows it going to the fuse box.

thanks