So no one has been replying to my old thread on this
He is an update.
I was having an issue where my coolant temp gauge wouldn't get above 150°
So I checked the temp of the housing with an infrared gun. Was reading near or just above 170
Had my terminal manager pull up the reading from our elog system, it also reads the ecm.
Ecm was showing the engine at 177° but gauge still under 150.
Swapped the sensor on top of the thermostat housing which is supposed to be the peterbilt gauge sensor, still not reading above 150
Is there a way to test if the gauge itself is bad or somewhere else I should be looking?
Truck is an 05 pete 379
C15 acert. Coolant temp gauge
Discussion in 'Trucks [ Eighteen Wheelers ]' started by Cajuncowboy654, Aug 15, 2019.
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Hmm my gauge doesnt go any higher or lower than 150 once the engine is warm.
Mine is an mxs -
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I just dont want to have an overheating problem and not know because my gauge isnt working
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Jump the terminals of the pigtail of the coolant temp sending unit and see if the gauge pegs out. Let us know what it does.
pushbroom and Diesel Dave Thank this. -
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Jumped terminals this mornin . Gauge pegged out so that should rule out the gauge, correct?
I did find a post last night about possible grounding issue. Will try a jumper wire from a good ground to the base of the sensor this afternoon when I get done for the day. -
With the wire unhooked your gauge show read nothing. If you ground the wire your gauge show peg out all the way right. Sounds like your gauge is working. Make sure you have good connection with wire to sensor. Those push on ones aren't great. Pinch it a little after you put it on. Or get something like a scan gauge D. Will read many thing off the ECM including temp.
Cajuncowboy654 Thanks this. -
Ok so I got the scangauge today and my dash gauge is definitely off.
Now I noticed a problem thoug . I have a coolant leak coming from the thermostat housing area along the block.
Any areas prone to leaks there?
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