Sometime's it will start and sometime's it won't, like it has an electrical short

have a load test done on the battery for failing cell and have the output of the alternator checked as if the battery is faulty then the alternator has trouble supplying enough current to run every thing electrical

ck for electrical short draining the bat. recheck batt could be defect. ck all electrical devices in the car to be sure they' re working. A alarm system is a big drain (if u have one)

It appears that you have a dead short in the switch, ehich would be like touchin teo wires together. Repkce of switch should solve problem,

Parasitic drain on electrical system .
How to Find Parasitic Battery Drain

what does the fuses go to that you are replacing.

I would suspect the fuel pump is the problem, it may be sticking at times and this causes a no start. The pump is located inside the fuel tank and it is electric.

ihave a 98 grnd chrk lrdo had to replace computer on fire wall, periodicly i spray all electrical connections w/ crs electric contact spray.

Your fan or heater likely shorted out and burned up, causing your one of the main fuses to blow due to the spike in current. You will need to determine what burnt up and replace it before replacing the fuse, or you may create a fire hazard or cause further equipment damage. Also double check any changes to wiring to make sure that everything is hooked up properly.

its the problem with your ignition coil . Replace it and check for loose connection towards the ignition coil connector kit

sounds like a bad ignition switch, no the key clylinder but the actual electrical switch.