The power distribution center, or fuse block, located under the hood houses most or all of the vehicleâs fuses and relays. It contains a relay for the ECM that is powered up when the ignition key is turned to the on position. This ECM power relay acts as a switch that supplies power to the ECM.
How to Tell When It's Time to Replace Your Water Heater. A water heaterâs lifespan depends on several factors, including water quality, water temperature, and maintenance. As such, lifespans vary anywhere from 8-15 years.
Location and Size. 1  Location - Replacement water heaters need to fit in the same spot in your home. 2  Dimensions - Before buying, measure the height and width of your current water heater. 3  Capacity - Most homes have 40- or 50-gallon capacity water heaters, although capacity ranges from 30 to 80 gallons.