First requirement is a decent quality multimeter spec'ed with 10 megOhms impedance minimum. You can buy a cheap china one for low energy use only, or spend a lot more for a safety rated Fluke. Then you'll need to read the service manual and follow diagnostic instructions in the ignition section. Until you do those you/we can only make guesses... and 99% of those guesses will not fix it, no matter how much money you have to throw at it. The work is easy... Have fun with it!