Hello all, I have a 98 dodge ram 1500 5.9L and would like to run a compression test on it. I attempted it earlier today, but tested incorrectly. I didn't open the throttle, or remove the fuel fuse. I cant locate where the correct fuse is, can any one please help me locate it. And tell me if there's anything else I should be doing to run the test correctly.


Is it the circled one?

I tested #8, #6, and #4 before I stopped due to the weather. They were all extremally low, but the numbers were all consistent.


Thanks for any help that you can all provide!

 

Numbers will be low if the throttle is closed.

Pull the fuel pump relay. Underside of the cover should show you which one it is.

 

I was looking at the underside of the relay, its orientation is confusing to me. I just want to make sure that I have the correct one!

 

Go by the shape of the diagram, and the box. That makes it pretty easy.