Originally Posted by dchamberlain

I'm still a little confused about what you're measuring. Are you measuring one glow plug wire at a time? Or an entire bank at a time? Or all 8 at once.

If you're clamping over the wiring bundle going to one bank, for example, you're seeing the amperage of 4 glow plugs. So 85 to 45 amps is an average of 21.25 amps initially, down to 11.25. This doesn't sound like a problem to me. When the glow plug is cold it's going to draw more current than when it's hot (see post #9).

As cheezit said, though. The correct way to test the glow plug is to unplug them and measure their resistance individually when cold.

Originally Posted by cheezit

2006my the glowplugs will self test.

Originally Posted by Strokin-8

Originally Posted by cheezit

pretty much what im getting at. it may take 2 starts/ run cycle to set the light but it will.