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'99 & up Upgrades and Aftermarket - 7.3L Engine Upgrading or adding OEM or aftermarket equipment to your 1999-Up Super Duty or Excursion with 7.3L Power Stroke diesel engine. Please confine discussion of topics in this forum to those items that are specific to the 7.3L Power Stroke engine.

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Old 05-20-2006, 08:52 PM   #1 (permalink)
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Pyrometer wiring diagram.

Does anyone have a link to a basic pyrometer wiring diagram. The one in my truck really doesnt work at all (like that when I bought the truck) I wanna check all the wiring......seems like there is no power going to it.
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Old 05-20-2006, 08:56 PM   #2 (permalink)
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Re: Pyrometer wiring diagram.

[ QUOTE ]
Does anyone have a link to a basic pyrometer wiring diagram. The one in my truck really doesnt work at all (like that when I bought the truck) I wanna check all the wiring......seems like there is no power going to it.

[/ QUOTE ]

What kind of gauges do you have?
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Old 05-20-2006, 08:58 PM   #3 (permalink)
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Re: Pyrometer wiring diagram.

Banks Power Gauges. I took the guage out briefly once and there were only two wires attached (going to the thermocouple) shouldn't there be a power wire???
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Old 05-20-2006, 09:03 PM   #4 (permalink)
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Re: Pyrometer wiring diagram.

[ QUOTE ]
Banks Power Gauges. I took the guage out briefly once and there were only two wires attached (going to the thermocouple) shouldn't there be a power wire???

[/ QUOTE ]

If it just has two wires going the the thermocouple it's a mechanical gauge. If it were an electric gauge, the wires from the thermocouple would go to a brain or the the gauge if the brain was inside.

Not a lot to troubleshoot with a mechanical gauge, I would just replace it. ISSPRO's work well for me.
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Old 05-20-2006, 09:06 PM   #5 (permalink)
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Re: Pyrometer wiring diagram.

Ok Thanks! I think I'll just replace the guages.
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Old 05-20-2006, 09:07 PM   #6 (permalink)
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Re: Pyrometer wiring diagram.

[ QUOTE ]
Ok Thanks! I think I'll just replace the guages.

[/ QUOTE ]

If you decide to I can recommend http://dieselmanor.com David knows his stuff, they have awesome prices and the ISSPRO's match stock really well.
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Old 05-21-2006, 09:57 AM   #7 (permalink)
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Re: Pyrometer wiring diagram.

[ QUOTE ]
[ QUOTE ]
Banks Power Gauges. I took the Gage out briefly once and there were only two wires attached (going to the thermocouple) shouldn't there be a power wire???

[/ QUOTE ]

If it just has two wires going the the thermocouple it's a mechanical gauge. If it were an electric gauge, the wires from the thermocouple would go to a brain or the the gauge if the brain was inside.

Not a lot to troubleshoot with a mechanical gauge, I would just replace it. ISSPRO's work well for me.

[/ QUOTE ]

That's not true, a two wire thermocouple produces it's own current (increased temperature applied to the probe creates an increased current flow in the leads) and is measured in milliamperes, this current is what drives the gage. The gage is calibrated to the length of the leads, that is why it is critical that the leads not be trimmed. You can check for function of the probe with a milliamp meter in series with the leads of the probe however without proper reference data you will not know what ma value equals what temp reading on the gage movement. One way to verify the accuracy of the gage is with infrared thermometer aimed at the location of the probe, and with the engine running compare values.

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Old 05-21-2006, 01:06 PM   #8 (permalink)
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Re: Pyrometer wiring diagram.

What's not true? You just described a mechanical pyro, the one I have is electronic, it has a brain.

Good info for testing the thermocouple, thanks.
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