I have a 90 that had the same problems with tach and speedo. If you wiggle the wire plug on the back they come back to life if held in the right position. I ended up having to take. We have noticed that the tachometer doesn't work at all and it looks like they just replaced it with a brand new one. I pulled the dash panel out (which i love how easy that is to.
It shows miles when the key is off but gives lines when key is turned on. Sometimes the end of the sensor can get chipped off and not work anymore. If it needs a new sensor, clean the threads in bellhousing with a tap. Screw sensor in until it. All of a sudden both went down. The tach is buried straight down between 0 & 30. My speedo is just under the 0 and they don't move when i turn the. The most common issue with the dixson 900 series analog peterbilt 379 speedometer is the odometer mileage stops and/or the speedometer needle stops working. This failure may be. Having an issue with a speedometer on a 2015 389. Speedometer has power and sweeps on initial key on but does not read speed. Both speed sensors are working correctly. You'll be best off to open the dash and access the back of the tach with a tester to check for continuity back to the sending unit first, to see if the wires are ok. At that point if they. I've got a 90 and had lots of problems with the plugs going into the back of the gauges.
Speedometer has power and sweeps on initial key on but does not read speed. Both speed sensors are working correctly. You'll be best off to open the dash and access the back of the tach with a tester to check for continuity back to the sending unit first, to see if the wires are ok. At that point if they. I've got a 90 and had lots of problems with the plugs going into the back of the gauges. You might try opening up the dash and wiggling the connectors around to make sure. If you look here , it shows that pins 38 and 39 of the chassis side connector at the ecm feed the signal to the tachometer. You need to check and make sure that the wiring is ok from those. It's more likely the wiring between the ecm and the sensor. If the datalink faults log when you go over bumps and the speedometer has issues at the same time, the issue is likely in the. If your speedometer is still working properly but your odometer has quit, that is an indication that you are still receiving a good speed pulse to the speedometer. But even if your. I purchased a 1994 peterbilt 377 a few months ago and the speedometer (and tripometer/odometer) & the tachometer have never worked. The cruise control does work. 2006 379 pete gauges not working. The tach and speedometer as well as odometer and a few of the gauges around this cluster. When key is off odometer will display number when ignition on. I'm just trying to get everything fixed on the truck so i can put it in service. A faulty vehicle speed sensor could be the reason that the speedometer isn't working. If there was an issue with the. Had the exact same problem, my mph gauge would say no data and 5 gauges were not working, the needles on 5 gauges would swipe like whipers and there were red lights.
If you look here , it shows that pins 38 and 39 of the chassis side connector at the ecm feed the signal to the tachometer. You need to check and make sure that the wiring is ok from those. It's more likely the wiring between the ecm and the sensor. If the datalink faults log when you go over bumps and the speedometer has issues at the same time, the issue is likely in the. If your speedometer is still working properly but your odometer has quit, that is an indication that you are still receiving a good speed pulse to the speedometer. But even if your. I purchased a 1994 peterbilt 377 a few months ago and the speedometer (and tripometer/odometer) & the tachometer have never worked. The cruise control does work. 2006 379 pete gauges not working. The tach and speedometer as well as odometer and a few of the gauges around this cluster. When key is off odometer will display number when ignition on. I'm just trying to get everything fixed on the truck so i can put it in service. A faulty vehicle speed sensor could be the reason that the speedometer isn't working. If there was an issue with the. Had the exact same problem, my mph gauge would say no data and 5 gauges were not working, the needles on 5 gauges would swipe like whipers and there were red lights.
