![]() The tacho on the Celica dash cluster was driven by the voltage spike on the 2S-C coil when it fired. I have also wired in a plug for a three wire oil pressure sensor which uses connects to the 5V signal out on the Haltech, and is assigned input AVI4 (O/Y) TachometerÄPO1 on the Haltech is the output assigned to drive a tachometer. ![]() The oil pressure switch is connected to AVI3 (O/R) on the Haltech, and also spliced into the oil pressure light on the dash. The 3SGE reverse switch wiring (R/L & R/B), connects to WL & Y on the original 2SC sensor wiring Sensors Oil Pressure IG2 is the igniton circuit that powered the ignition coil and igniter on the 2S-C. Signal wire on the 3SGE for the starter is B/Y.
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