Toyota (Geo Prizm) Speedometer: Diag & Repair

The 1996 Geo Prizm is possessed! The speedometer has a mind of its own...and it needs to be fixed to pass the Pennsylvania State Safety inspection (and keep the new owner from speeding in this pocket rocket). Oscilloscope used in this video: Pico 2204A with Arbitrary Wave Generator: https://www.picotech.com/oscilloscope... Enjoy! Ivan