‘66 Barracuda Fuel Gauge Pegged!
When the car puts 12 volts at the red arrow path, the substitute regulator gets 12 volts. So does the internal limiter. the current path inside the gauge that you can't see is marked with pink arrow. So dont put 12 volts to that gauge post. put it directly to the substitute regulator. The 5 volts out of that regulator will feed into the original limiter and out to that contact pin also but that is of no consequence if there is no wire attached there, or a chassis ground. The only current path for the 5 volts is where it is supposed to go.... through the gauge.
When the car puts 12 volts at the red arrow path, the substitute regulator gets 12 volts. So does the internal limiter. the current path inside the gauge that you can't see is marked with pink arrow. So dont put 12 volts to that gauge post. put it directly to the substitute regulator. The 5 volts out of that regulator will feed into the original limiter and out to that contact pin also but that is of no consequence if there is no wire attached there, or a chassis ground. The only current path for the 5 volts is where it is supposed to go.... through the gauge.
