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Glow plug amp draw

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Old May 17, 2011 | 12:09 PM
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Glow plug amp draw

Does anybody know the amp draw for all 8 glow plugs, or approximately what it should be?
 
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Old May 17, 2011 | 12:10 PM
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It depends on how long they've been on.

The longer they're on (the hotter they are), the less current they draw.
 
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Old May 17, 2011 | 12:30 PM
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Ok- I was thinking I could tell roughly if all 8 were working without ohming out the connector. Pretty sure a couple of mine are bad. Probly just change them all out one of these days.Thanks, Bill
 
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Old May 17, 2011 | 12:41 PM
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Unfortunately, I've been burned once while just "ohming them out". They had good continuity when cold, but as soon as they were warm, they'd go open and not work at all.
 
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Old May 17, 2011 | 01:01 PM
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I remember someone doing a current test, but I can't find what they measured. Stay tuned, someone will come up with the right current reading.
Nick
 
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Old May 20, 2011 | 12:28 AM
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I have seen about 50 or a little more on each side using the AE. I think my clamp on amp meter showed a little less maybe 40 something each side. I could check again to make sure if you want.
 
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Old May 20, 2011 | 07:25 AM
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on a cold engine they should peak at 188-192 amps then drop down from there.

Barney
 
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Old May 20, 2011 | 07:59 AM
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If you average them at 1 ohm in parallel, you're looking at Current (I) = Voltage (V) / Resistance (R). At 12 volts assuming 1/8 ohm (1 ohm / 8 GPs), that's 96 A... As resistance goes down, current goes up. If some of the GPs are less than 1 ohm (let's say, total load goes to .1 ohm instead of .125), current goes up to 120A. To get 200A, you'd need them all to be about 1/2 ohm each for a total load of about .06 ohms. 12V/.06 ohms = 200A.
 
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