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Old 07-26-2016, 06:16 PM
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Ahhh the wiggle test

Wire
Integration
Gross
Gyration
Looseness
Exam
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Old 07-26-2016, 06:17 PM
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Where would they be located at? I can check the wiring and see if any of the connectors are getting corroded. The coil-diode unit.
The diode is usually very near the coil and it's wiring. I mean usually within inches.
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Old 07-26-2016, 06:17 PM
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Ahhh the wiggle test

Wire
Integration
Gross
Gyration
Looseness
Exam
LOL, did we have the same electrical instructor?
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Old 07-26-2016, 06:26 PM
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Ok....Pulled the fuse block and underneath is dust some dirt but no corrosion..where the wires are crimped still bare metal no rust.
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Old 07-26-2016, 06:26 PM
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Learned that in A school (great lakes naval base). So where's the coil at?
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Old 07-26-2016, 06:36 PM
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2.2 ohms forward 1.4 ohms reverse....but that's with the coil in parallel.
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Old 07-26-2016, 06:49 PM
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2.2 ohms forward 1.4 ohms reverse....but that's with the coil in parallel.
yeah, you have to pull it out of the circuit. The coil is on the compressor. Just unplug it and read it directly then read your diode again.
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Old 07-26-2016, 06:50 PM
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Learned that in A school (great lakes naval base). So where's the coil at?
Yeah I spent some time in great mistakes learning to never again volunteer yourself LOL
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Old 07-26-2016, 06:57 PM
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How long were you in for? What ships? USS talbot and USS H. W. Gilmore....
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Old 07-26-2016, 07:01 PM
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How long were you in for? What ships? USS talbot and USS H. W. Gilmore....
6 years. wasn't assigned to ships but spent time on a few gator freighters
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Old 07-26-2016, 07:25 PM
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Can you give me a better description on the coil/Diode unit and the compressor....
you said "just unplug it...
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Old 07-26-2016, 07:31 PM
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Can you give me a better description on the coil/Diode unit and the compressor....
you said "just unplug it...
Ok, you see where the belt rides on the pulley? Just behind that on the compressor will be a plug. The coil is basically an electromagnet that engages the clutch so that the turning belt turns the compressor itself.
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Old 07-26-2016, 07:33 PM
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so I measure on the plug or the compressor? and if bad does that mean the whole compressor has to be replaced?
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Old 07-26-2016, 07:36 PM
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so I measure on the plug or the compressor? and if bad does that mean the whole compressor has to be replaced?
Measure the diode as you did when the compressor was plugged in, just unplug it now. Then do a reading on the coil both cold and hot to see how much it changes.

Check this out to see what I mean.
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Old 07-26-2016, 07:41 PM
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I noticed that there is a plug directly on the compressor, two wires leave the plug and go to a small rectangular box of white plastic. Would that be the diode? It looks like it could be opened.
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Old 07-26-2016, 07:46 PM
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I noticed that there is a plug directly on the compressor, two wires leave the plug and go to a small rectangular box of white plastic. Would that be the diode? It looks like it could be opened.
Yes, it probably is the diode.
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Old 07-26-2016, 07:48 PM
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looks like the only way to get to it is from underneath....time for the upside down crawl....
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Old 07-26-2016, 07:49 PM
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looks like the only way to get to it is from underneath....time for the upside down crawl....
Been there done that. Have fun.
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Old 07-26-2016, 08:07 PM
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OKey Dokey. I got it off. Interestingly it's got splice connectors that connect to the wires without having to strip the wires. Anyway measured on the diode setting of the Fluke open both ways...I'd say it's bad. The way I see it when the EM field collapses it causes a surge that blows the fuse.

Now for a part number...It has P E D 7 on it.has an X and a Y on the other side.
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Old 07-26-2016, 08:15 PM
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off to auto zone...wish me luck
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