gtorresucf
New member
I have a Honda BF30. I am troubleshooting why the oil pressure indicator lamp never turns on. Motor runs fine, no LED and no Buzzer. With the engine off, I removed the yellow wire from the oil pressure switch and with an ohm meter, from where the wire connects, there is continuity to ground. Is this correct? I also checked the complete continuity path of the yellow wire from the switch to the CDI and the CDI to the lamp indicator, all good. I then tested to see if the actual LED lamp was good. I removed the Indicator assembly and placed a 9V battery to the Yellow and Red wires, no lamp. I then placed the 9V battery on the Black and Grey wires, and to my surprise, the Oil Lamp indicator lights up Green. How can this be? According to the wire diagrams I have seen, the Yellow and Red wires are for Oil Pressure, and the Black and Grey wires are for the Over Temp sensor. Any guidance would be much appreciated.