Installing an Aftermarket Tacho Into KE70
If you wish to install an aftermarket tacho into a KE70 Corolla, You can utilise the factory wiring harness (As far as I am aware the tacho signal wire is already there to suit a CSX tacho dash cluster from factory). The tacho signal is taken off the negative side of the coil (black wire) and can be traced back behind the dash cluster on the left side of the third connector (going left to right) Marked with the red arrows.
Article by Medicine_Man
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