Dad had a Service station when I was growing up (anyone remember those?). It was right between home and school (a little closer to school).
I would leave early and help him open up for the day. Mind you, I was about 9 or 10 years old. I'd count the cash in the till and make a note of the amount, clean the restrooms and restock the essentials. Good thing he had coffee ready when I got there. Then another stop on the way home. I worked the full service island. I pumped gas, checked liquid levels and topped them off free of charge. Who does that nowadays? But I digress...
Probably the most important thing he ever taught me was to start at the most simple/least expensive possible solution. Car won't start? What's it do exactly? Does the key just turn? Does it make a clicking noise and nothing? Check the power source/battery. Leads all gunked up and corroded? Does it have any water in it? If everything looks good, check the fuse panel next. I think y'all get the idea.
My 1st Kia developed a problem with dying at an idle. It was right under the 5 yr warranty period so I put it in the shop. The 'service techs' hooked it up to everything in the shop and failed to find anything wrong. I was however chastised for the varnish buildup and told to change the oil more often. Dusk was approaching when I picked the car up and I wheeled out of the lot. The next light I stopped at, I turned on the wipers as is was starting to rain. The rpms dropped a tad, but no biggie. A few lights later, I turned on the headlights and the rpm's dropped to the stall point and I goosed the gas to keep the car running. I then pulled into a parking lot and did a little diagnostics of my more simple days gone by. All electrics off. Car runs fine at idle. Turn on the wipers - rpm drops. Turn on lights and car dies. Let's try this again. Start car, turn on lights. Car barely runs withought assistance. Add wiper? Boom!
I was able to get home and checked the fluid level in the battery. Fluid level? We don't need no stinking fluid!
I had no distilled water so I added tap, and it was enough to get me to Sears and have a new battery installed the next day.
Sorry for being long winded, but my teachings from 50 years ago still ring true to this day. As evidenced by dclord and this thread; the KISS principal is alive and well. Tens of thousands of dollars of KIA testing equipment, and the latest greatest technicians couldn't tell me my battery was low on water.
Thanks Dad!
Aim small - miss small.