Re: Changing bulb in GEN gauge

Posted by HH56 On 2023/7/16 11:27:55

I must have skipped over information about an alternator being installed. There are different type alternators and ways they could be connected. Most alternators being used today are the self exciting single wire models with nothing else involved. You mention a relay (which might actually be a voltage regulator) used with yours so without knowing more details on the alternator or any other components in your car, hard to guess where the bulb is in the circuit or what might be going on. Looking at a few common wiring diagrams of alternators with external regulators I see 3 different ways a bulb could be in the circuit.