my tachometer stop working after replacing the ECU computer in my Dodge Ram 1500 1996

Asked by Jan 06, 2015 at 07:04 PM about the 1996 Dodge Ram 1500 2 Dr Laramie SLT Standard Cab LB

Question type: Maintenance & Repair

14 Answers

5,435

Hi did you have the vin programmed to the new PCM

Best Answer Mark helpful

Yes!

All other gauges work

5,435

was it a reman PCM its possible that it is defective ....//let me look to see if its hard wired or bused over to the cluster

Yes its a remanufactured unit. Also my truck will not stay running unless is at operating temperature.

5,435

it shows the the tach is a dedicated wire to the cluster in the C3 connector pin 31..can't find the diagram with the pin outs to show you

5,435

the running issue may be that all the sensor values were reset and it still is learning ...you may need to clean the throttle body to help this along

I cleaned it yesterday.

5,435

ok so you may have an issue with the reman PCM then I would get another one it should be under warrenty

Could it be a fuse that is causing the tach not to work?

5,435

it shows the same fuse powers up the speedo and volt meter

5,435

check fuse #12 in the fuse block 15 amp

5,435

this is what I have

The fuse is fine but replaced it anyway. As far as the PCM, I can't return it right now because my car is in the Body shop and the truck is the only thing I have to drive.

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