PILOON
Super Star Member
Sounds like you are on the right track.Yes, I did remove the bus bar. I even removed the glow plugs from the engine. Results each plug measures less than 1 ohm. #1 measures .2 ohms #2 measures .3 ohms. and #3 measures .5 ohms which means they should be good, right? Now the kicker, when I test with a 12V batt. They will not glow and they never get warm to the touch. The batt. I used is at 12.6V. I rechecked the voltage to the bus bar I am still getting 12.6V
BUT how about grounds?
A weak ground often can conduct voltage at low amperage and fail to carry high amps.
Another test would have been to power each plug individually outside of the engine.
For that even less than 12 volt source should warm them up.
Momentary powering @12 volts should make each one glow or at worst warm/hot to touch.
A glow plug is nothing but a fancy resistor designed for momentary usage.
Easier still is to create a good ground from battery immediately adjacent to the plugs and then apply power to each plug and feel for heat.