Well I got some new tires put on the other day and right after that my car decided not to start, so after a few minutes of trying it just starts out of the blue. A while later it does this again but I get it started again. Only randomly starts out of the blue now. Also, while im driving if I hit a bump or my car jolts for any reason my lights get brighter my check engine light ( its always on) and my cluster all get brighter and my temp. gauge also fluctuates. After finally gettin the car home, yet again, my car wont start I mean nothing , no clicking...... nothing. If I turn my key into the position of "on" with the clutch in theres nothing, but if I pump the clutch my speedo just goes crazy. Any help will be much appreciated. Possibly the switch that tells the computer that clutch is engaged? I have no idea at this point

 

You have a loose ground on the motor i woud check all of those and then check around the alternator make sure all of those grounds are good.