Last wednesday I had my engine converted to 100% LPG system. Well, it turned out this passing week was also a heap full of bad luck. Thursday a girl running late to an exam crashed into my bumper+front part of the left fender (which rendered just a bent front fender). Friday my Jeep wouldn't start after going to the bank, and after 4 hours of diagnosing the problem, it turned out it was a burnt LPG fuse and a burnt ignition fuse (I'll tell you how I came across this later). Yesterday while running around doing errands, I lost my last keyfob for my Mercedes C180, and now I'll have to replace them for a huge amount of money.
Alright, so on to the problem. Friday, I had a friend tow me back to my house, but he couldn't push my jeep up a little hill that takes it to a garage, so we just left it outside in the curb. I didn't feel safe leaving my Jeep outside, so I did a really stupid thing: crank the jeep up the hill while supplying power to it with my Merc. Just before reaching the end of the hill, the starter stopped cranking, it just have a HUGE spark at the negative battery post every time I cranked, so I saw that as a sign and waited for my father to help me push it in with his truck pushing in reverse.
So when I changed the fuses, the LPG system was working once again, but the starter still wouldn't move. I removed it, and jumped the positive post to the post with the braided wire going to the starter motor, and the motor moved (sounding like a normal electric motor). When I jumped the positive post to the post going to the ignition switch, I just had a HUGE spark and nothing really moved (I didn't dare try more as this could be damaging the starter).
Now, after having a horrible week, I can't afford purchasing a new starter motor. My diagnosis leads me to believe the solenoid is the problem, but I'm not 100% sure. Is it, or could it be the ignition switch which could be going bad (I changed the ignition lock a year ago, but I'm not sure it could be also related).
Fake edit: What does the solenoid do, exactly? Does it engage the starter gear, as in, it moves it outward so it turns the flywheel?