2006 International Jake Brake Problems

I have a 2006 international with a C15 cat engine in it. a couple months ago it was an issue that the oil level in the pan kept rising, so I removed valve covers, I removed jake brake heads and all injectors, replaced all O-rings and reassembled. the engine ran fine and it no longer did it leaks fuel into the crankcase. however, ever since my jake breaks don't work. I have double checked all my connections and everything seems ok, I over heard a couple of the guys saying that they have needed to bleed jake heads to get them to work again because they may be somewhat air locked. so my question to you guy are the following:

1) How do I check that the jake brake solenoids are receiving power to make sure that the electrical portion of this system is working properly?
2) How do I bleed the system?


any help at all will be much appreciated

 

so each jake head has 3 solenoids, 1 in the middle of the jake head and 2 other ones at each end. which one should I check for voltage? and the only time that it should be activated is when u have released the throttle after you have revd it up, right?