Gauges going crazy!

Has anyone experienced your dash lights and needles bouncing all over the place? My abs, slip, airbag, and brake lights come on intermittently and all of my gauge needles except fuel, and battery stop working. Any ideas?

 

I’ve never had it happen to me, but on almost all the formn’s I’ve been on and seen post’s like this, most of the time, it turns out to be a bad ground. I’m not sure about the Tudra, but I know on my 2004 Denali, it had several grounds and it doesn’t take much corrosion/oxidation at a ground to cause a problem.

 

Following thread. I recently swapped the radiator and forgot to clamp the lower coolant hose to the thermostat. While idling in driveway checking for leaks and if it held temp the hose came loose and shot coolant all in the engine bay.

After reconnecting, refilling, and checking again, everything seemed fine. Drove it up to gas station to fill up, no problem. On the way home traction control came on solid, the the ABS light stayed on, then my Tach, Speed, and Oil pressure gauges would dip in sequence every 30sec. The digital data above the center console would flash as well.

It runs great, no abnormal noises of any kind. Just started the dash jitters. It seems electrical in theory, but worried it's a module of some kind. In lieu of a simple ground or sensor.

 

Mine has done this twice. The first time it was the ground strap between the body and transmission rusted in half. The second time it was a bad wheel speed sensor on the front driver side wheel.

 

Time to chase the electrical gremlin.

 

You have a "bug" in the communication line between all the ECUs I would bet OR potentially a bad ground.

Data to run all these gagues and lights comes in on the same two wires, the CAN or Communication Network. If it gets a short/interference it will make all these items do crazy things as it receiving bad data at times.

 

Where was the ground strap?

 

Between the right side of the transmission and the floor pan.