When someones life is in your hands you really need to focus. I know first hand! PRODUCTION is all the advisors and management care about, NOT you! I worked for a local Ford dealer for 9 years and dealt with many things. Most were garbage! I of course was a Body Tech but danger looms there too. Liabilty is yours as well as the companies when it comes to vehicle repairs. The dealer that I worked for made us carry Nextel phones. OMG what a joke! Expected to be on your hip throughout the day. Biggest distraction ever imo.
Best thing has been stated below. Triple check everything. Hang a wrench/ratchet or take it off/let it hang.. You more than likely are just Plain ol' Burnt out! If you got vacation time, Take it! Go get you some Ginseng for your focus and take it daily(It works!). Use this time to forget work and cars. Got a Lady, take her to the beach or something. You gotta clear the **** outta your head. When you go back to work you will feel the difference!
Just my 2 pennies!
Good luck