" Pull the electrical connector wires off to expose access to the glow plugs. Remove one plug at a time by placing the socket over the top of the glow plug and turn it counterclockwise to remove.
Clean the threads of the glow plug with solvent and a rag.
Set your voltmeter to Ohms and touch the electrodes of the voltmeter to the glow plug.
Check to see what the resistance is of the glow plug. If you do not have an auto-ranging meter, try other resistance setting to verify you measurement. If the meter reads an open or infinity measurement (on Fluke meters, it will read OL), then the plug is defective. If the glow plug shows resistance that is approximately less than 5 Ohms, then the plug is not defective.
Repeat Steps 1 through 4 for each glow plug.
Tuesday, August 31st, 2010 AT 9:42 PM