Electrical & Sensors
Electrical problems make good mechanics swear. These guides give you test procedures with real values: how to test a glow plug, how to find a parasitic draw, how to clean a MAP sensor, and when the sensor is lying versus when it is telling the truth.
Electrical & Sensors
MAP vs MAF Sensor on a Diesel: Clean, Test, Stop Guessing
Dirty MAP or MAF sensor killing power on your diesel? Learn what each sensor measures, how to test both with a scan tool, and how to clean them right.
Electrical & Sensors
Parasitic Draw Test: Find Battery Drain on a Diesel Truck
Diesel dead again overnight? Run this parasitic draw test: sleep the truck, read the milliamps, pull fuses until the number drops. Dealer method, exact numbers.
Electrical & Sensors
Bad Glow Plug Symptoms in a Diesel (How I Test Them)
Bad glow plug symptoms in a diesel: long cold cranks, white smoke, codes P0671 to P0678. See how to test glow plugs with a multimeter before buying parts.