Symptoms of a Bad or Failing ECM-Power Relay. The ECM, or electronic control module, is the computer responsible for controlling all of the engine management functions. It is the central control unit of most vehicles and controls a variety of functions, such as electrical system power distribution, emissions, ignition, and fuel systems.
1 Replace the tire if the top of Abe's head becomes uncovered by any of the grooves.  If your tires are only partially worn, find out how much. Stick a tread-depth gauge (about $5 at auto-parts stores) into each of the grooves on all four tires, as shown in the photo below. Then check how many inches of usable tread remain and match your driving to the tread wear.
1 According to the tire industry, the average tread depth of a new tire can range from 10/32â³ to 11/32â³.7.  Tires age whether they are driven on or notâbe sure to check tires on recreation vehicles, trailers, collector cars, community vehicles and 15-passenger vans, too.8.