How to Check the Rear Defogger on your Oldsmobile Alero – The defogger on your Oldsmobile Alero helps to keep the rear window clear of water vapor during the cold weather months by flowing current through the grid. The wiring is mounted on the inner side of the window.
However, the timer relay, switch, fuse, grid and wires in the circuit connecting these components are subject to wear and damage. Finding the failed component can be a little tricky, but with some basic strategies–and tracing the current flow in the circuit–you can troubleshoot and fix your Alero rear defogger.
Tools Used: Tools, Test light, Rear window defogger repair kit, if necessary
Check the Rear Defogger