Ron, the part I am referring to is the voltage stabilizer, which is supposed to send a constant voltage of around 10 volts to certain of the instruments. The fuel gauge and temperature gauge will read high if more than 10 volts are supplied and low if less than 10 volts are supplied. I believe the device installed when our cars were new is the old style stabilizer which operates with points inside a tin container, hidden somewhere behind the dashboard. I have purchased the new space age solid state stabilizer which is supposed to be more reliable than the original. We'll see... The voltage regulator is built into the alternator and maintains the output of the alternator at an acceptable level, 13 volts or whatever. These are two different parts, serving two different functions. I hope to dive into the dashboard this weekend to again try to locate and replace the offending unit. John AK1103