Anyone know what THIS is ???????????
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Lead Driver
Joined: Dec 2003
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Anyone know what THIS is ???????????
A buddy just bought a truck, and asked me if I had any idea what this thing is:
The two wires together go down to some kind of probe in the exhaust. It is down below next to the tranny. The yellow wire goes to a 30amp fuse link directly to the power side of one of the batteries. It is not connected. The green wire goes somewhere behind the dash. He has not located it yet, but will do so this afternoon.
Whoever had it before added this on top of the factory fuse box under the hood. Told him it looks a little elaborate for a pryo gauge. All the labels have worn away with time so there are no clues. It is obviously aftermarket, but we have no clue what the hell it is.
Do any of you guys do? TIA!
The two wires together go down to some kind of probe in the exhaust. It is down below next to the tranny. The yellow wire goes to a 30amp fuse link directly to the power side of one of the batteries. It is not connected. The green wire goes somewhere behind the dash. He has not located it yet, but will do so this afternoon.
Whoever had it before added this on top of the factory fuse box under the hood. Told him it looks a little elaborate for a pryo gauge. All the labels have worn away with time so there are no clues. It is obviously aftermarket, but we have no clue what the hell it is.
Do any of you guys do? TIA!
Senior User
Joined: Feb 2012
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Wobbleshaft exciter capacitor,aftermarket style.Much easier to add this than replace the oem part.Also can be a part of the headlight fluid monitor circuit in the 2002.5-2003 trucks.
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Looks like the amplifier box for a pyrometer gauge.
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Lead Driver
Joined: Dec 2003
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Was wondering that, but had never seen one. It was the only reason we could think to have a probe in the exhaust, but it is pretty far from the Turbo.
What kind of pyros use this?
What kind of pyros use this?
Senior User
Joined: Oct 2009
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From: Plant City
The red and yellow wire is a type K thermocouple. Think of it as a temp probe. The green and yellow wire is more than likely and output going to some type of a pyro gauge or display that was once in the truck. We use those probes all the time where I work.
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Lead Driver
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The yellow is going to power at one of the batteries, but is not connected. Your description sounds likely, really wonder if it is for an LCD display or a regular style gauge. That way it would be easy to retrofit a regular EGT gauge.
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Joined: Oct 2009
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From: Plant City
I would guess it goes to power a LCD type display since it is not a like wire. For example a pyro gauge has to have the same wire from the probe to the gauge to get an accurate reading. This is due to it being a certain composition (chromel {90 percent nickel and 10 percent chromium} – alumel {95% nickel, 2% manganese, 2% aluminium and 1% silicon) in your case with the red and yellow paired wires. Now more than likely the box is the converter that puts a signal piggyback on the power wire that would go to the LCD type gauge. Your gauge would then use the 12v to power the gauge and the signal to display your temp. OR your missing some wires coming off the black box that would go directly to the signal side of a gauge.
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Lead Driver
Joined: Dec 2003
Posts: 5,250
Likes: 42
I would guess it goes to power a LCD type display since it is not a like wire. For example a pyro gauge has to have the same wire from the probe to the gauge to get an accurate reading. This is due to it being a certain composition (chromel {90 percent nickel and 10 percent chromium} – alumel {95% nickel, 2% manganese, 2% aluminium and 1% silicon) in your case with the red and yellow paired wires. Now more than likely the box is the converter that puts a signal piggyback on the power wire that would go to the LCD type gauge. Your gauge would then use the 12v to power the gauge and the signal to display your temp. OR your missing some wires coming off the black box that would go directly to the signal side of a gauge.
Thanks!!