ved12 cranks but does not starts

Hello Guys, here i am again with a new problem on same truck i had low mpg. After sitting in cold weather, truck does not starts. First change new batteries since old were weak. Cranks but does not starts, used starting fluid, looks like it want to starts and when stop spraying engine stops. Now changed both filters spin on filled with diesel about 1inch from top edge, and the other with plastics cover. And again cranks but does not starts. Worked with the little thing next to spin on fuel filter to pump manually fuel, again nothing. Filled to top fuel filter (with plastics cover), pumped untill all the diesel from the it went low. Again nothing. Left key on for about 5 min to release air from the fuel system(a friend told me this helped him) and again nothing.My guess here is i have air in the system, or my pump does not works. Now i heard ved12 have a electric priming switch in the cab, where is this switch? And how should i check if pump works? But if it's bad and since i pumped it manually it should start anyway isn't?
ANy ideeas of what else it could be? Dash does not shows any errors.
Thnx!

 

I don't want to use a whole can of starting fluid on my truck. Some starting fluid yes, but not a can, it can damage the engine(you know that i guess). Outside was 38F, so gelling is not the problem.

 

When u say ground u mean the ground that is connected to the frame with a bolt?

 

Ok guys will check today both with fuse and pass side. Anybody of you heard about releasing a bit the spin on filter, pump manually untill fuel starts leaking, and tighten it back?