So my search skills are lacking. i need to know what the inline plug is in my fuse box. this is for the 99 dodge quad cab 2nd gen 24valve. i am having intermittent codes being through that point to the ECM, but i found the screw/plug for the inline loss. i tightened it and the codes went away, but now i am hesitant to take the truck far from home. Any explaination would be helpful.

thanks in advance!
Hek

 

Under the hood, or in the dash, driver's side?

 

under the hood. Looks like a big plug. I will get a picture and post shortly.