More then likely you have an issue on the generator field control wire. Either a connector issue or the wire itself has a short or high resistance. I highlighted here in the wiring diagram.
We need to check for a short and measure resistance from end to end. Basically this is the wire that the PCM uses to control the generator.
We can confirm the generator is causing the light to come on if you check the voltage across the battery when the engine is running. There should be around 14 volts. If not then the light is coming on properly telling you the voltage is low.
Let me know what you find. Thanks
Monday, August 17th, 2020 AT 6:14 PM