Re: BigKev's 1937 115-C Convertible Coupe

Posted by TxGoat On 2023/4/29 14:20:25

The 12 to 6 V unit might be a problem if it is not regulating as it should. The dash gauges are very sensitve and need a stable power supply. Many older cars have a small voltage regulator to stabilize the gauge circuit power supply. These often malfunction as they age and can cause poor and erratic gauge function or no function at all. I once had a '52 Cadillac convertible with 6 volt gauges and a 12 volt starter and generator. I put an old radio volume conrol in series with the power suppy to the temperature and fuel gauges and adjusted the "volume" until the gauges were fairly accurate and stable. That trick worked very well for years. I've had issues with late 1960s Ford pickup gauges that were caused by a malfunctioning gauge voltage regulator. On those vehicles, the regulator was a little metal box with two wires attached that was mounted on the back of the gauge cluster.