So the little plug for the etc gauge (the one that runs to the cluster on the dash) broke, like actually crumbled and wiring was dry rotted, I figured to just by pass this with a after market gauge but I can’t figure out the thread for the sensor ( the little nipple shaped one) I’ve tried Ai search but it gives me different answers every time I ask I believe it’s m10x1 and I was gonna just get an adapter to fit from 1/8 27npt (since most after market gauges are the size) to m10x1 but I’m not 100% that’s the thread, thanks much in advances for any and all help!

 

The single wire ECT sensor for the instrument cluster IS threaded 1/8" NPT. Why not just cut an OE plug from an original engine harness with say 6 inches of wire and graft it to your current engine harness... then plug it in to the original sensor.