Hi everyone,

I have a controller board for a plow truck and i'm trying to see how i could test the components on it to see whats failed. It looks like the red thing circled is burnt out. I don't have much experience but i can solder/desolder as i have a hot air station and a decent soldering iron and what not. Any help would be appreciated. I've circled an LED that seems to be burnt out, as all other LEDs light up, but i doubt thats why the controller isn't working with just a light out. Also i've circled what i'm not sure is a fuse or a resistor. Thanks

 

Look at the data sheet the first circled one connects to; will give clues if it is a fuse or other. The red circled is a diode.

 

How would i go about getting the data sheet? Is there a way to test the diode, because there's brown under it, as if it burnt out. Even if i get the data sheet i probably wont know what i'm looking at lol. Thanks though.

 

Search "data sheet 'number stamped on IC' "
"Brown under" can be glue to hold the diode in place at manufacturing.