Hi all,

I have a 2005 Ram with 5.3L Hemi. The Tachometer works intermittently and when the needle does move it is inaccurate. I am trying to find out how to troubleshoot this. I cannot find info on where it receives its information or how to determine if the guage is faulty. Any pointers would be greatly appreciated.

 

Wish I had an answer for you... I just brought an 06 Ram 1500. The break light and ABS light is on. The Speedometer works but the tachometer doesn't. My mechanic plugged in this scanner and got the c1036 (rear speed sensor) code... the strange thing is when he tried to deleat the code the tach started to work. As soon as he unplugged the scanner the lights remained on and the tach stopped working again. Strange... replacing the sensor didn't help.