Hi all, a friend at work has a 57 chevy in which he is trying to install a "Made in China " Tach. With a stock 57 I dont understand why he would want to junk it up with parts made in 3rd world countries but ...such is the case. He wants to know where to hook the red wire...the answer of "to the ignition switch", was not good enough..So "where exactly under the hood can he find hot switched by the ignition switch? Associated Question does the coil circuit have a resistor wired in series in the run position that is bypassed in the start position and if so where is said resistor located? Asociated answer to post which I cannot now find..Car stalled at 55 mph had to be towed...does the tack wire go through the firewall and if so does it have a rubber grommet around it? A shorted coil will always keep a car from running and most often "aftermarket" devices cause the reliability issues in vehicles. On older cars that use a capacitor to supress noise...I have seen those short when hot and open when cold and kill an ignition. I have seen improperly wired Power amps burn vehicles to the ground when the output transistors shorted..in short (pun) when installing aftermarket devices on a vehicle always fuse as close to the source of power as is possible, when traveling through sheet metal always use grommets(Radio Shack sells them cheap) and never ever drive through standing water across a roadway...Thanx to anyone that may be of help...