I did search but all they said is go check the service manual
I have asked this long time ago, someone can tell me again how to clean the light?

 

Have the key in the accessories position, hold the SEL and TRIP buttons on the dash, then turn the key to the ON position. Continue holding the buttons (5 seconds or so, I just hold them until the light stops flashing) and it should be reset.

~Andrew

 

This and many, many more questions are answered in "FAQs ..................... " in the "Technical" section of UTH.