aftermarket temperature gauges

Maybe they know how to rebuild a alternator or starter, but they don't know how to work on aftermarket temperature gauges. I called and asked and they said they did know how to work on gauges. I had two gauges previously installed and they were not working. Took my truck in and they told me they were broken and needed to get replaced according to their amp meter. They charged me 50 bucks for nothing. Next took my truck to a person with no experience with electrical and checked my fuses first. And that was the problem a blown fuse and replaced it for 1 dollar. And he charged me nothing. Don't take your vehicle to this place if it is not an alternator or starter problem. Oh, and they talk to you like they know what they are doing but they are second guessing the problem! Hope this helps.