Dodge Ram 350 Van Speedometer Goes Wild

Speedometer Runs Erratic

Q: 1994 Dodge Ram 350 Van. Speedometer occasionally goes wild--0 to 60 mph back and forth. then quits to 0 for an hour.

Fuel guage does not work.


A: Most probably the problem is Speed sensor or its issue with instrument cluster.The vehicle speed sensor is the most likely cause for this problem. The vehicle speed sensor is in the left rear of the transmission, hopefully this is the sensor that you have to replace. The one on the top of the rear differential is only used for ABS on these older vans.Please make sure you replace the correct sensor.

If the correct sensor is replaced and the symptoms are the same then you almost surely have a wiring problem. The sensor receives an 8v reference, a sensor ground, and has a signal wire. While it's acting up you would need to start by testing at the sensor to check the reference voltage, sensor ground and the pullup voltage on the signal wire. You should find at least one of these is missing. I would recommend at least a good visual inspection of the wiring leaving the sensor and running up to the engine compartment.

The fuel gauge could either be the fuel sender or wiring, assuming the gauge in the replacement cluster is good. Outside of a visual wiring inspection you would need to drop the fuel tank and check the sender's pullup voltage and sensor ground, if they are ok then you know the problem is the sender.

This will help.
Thanks.

Fuel gauge jumps from empty to full?

If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.



Very common problem,faced by many car users.The Fuel SENDING UNIT has failed. And is causing this Fluctuation of the gauge,The Sending Unit Is mostly Located IN the FUEL TANK & Requires TANK REMOVAL to Replace it,

NOTE: ----IF YOU HAVE HAD THE FUEL PUMP REPLACED RECENTLY, THEN 99% PROBABILITY THAT THE INSTALLER WAS NOT VERY GENTEL WITH IT, THIS IS A COMMON REASON FOR THIS TYPE OF FAILURE.

The details will help.

Thanks,.

----------------

Check the list of car problems and solutions mentioned below for more help:-----

Car instrument cluster has no power?

http://schematicsdiagram.blogspot.com/2011/12/car-instrument-cluster-has-no-power.html

How to replace Instrument Cluster on Acura Car Models?

http://repairhelpcenter.blogspot.com/2011/11/how-to-replace-instrument-cluster-on.html

How odometer works in cars?

http://technoanswers.blogspot.com/2011/11/how-odometer-works-in-cars.html

How to trouble shoot speedometer?

http://schematicsdiagram.blogspot.com/2011/06/speedometer-not-working.html

Warning lights on and speedometer died?

http://howtobyme.blogspot.com/2011/08/warning-lights-on-and-speedometer-died.html

ABS & Brake lights warning indicator steady on dash and speedometer not working for Dodge Ram?

http://howtobyme.blogspot.com/2011/11/abs-brake-lights-warning-indicator.html

Car jerks while going uphill and Check engine light is ON?

http://schematicsdiagram.blogspot.com/2011/12/car-jerks-while-going-uphill-and-check.html

Car turns over, but only starts, if starter is jumped?

http://schematicsdiagram.blogspot.com/2011/12/car-turns-overbut-only-startsif-starter.html

Service Engine Soon light stays on?

http://schematicsdiagram.blogspot.com/2011/12/service-engine-soon-light-stays-on.html

Gasoline around gas cap?

http://schematicsdiagram.blogspot.com/2011/12/gasoline-around-gas-cap.html

Car will not run after resetting inertia switch on Mercury Mystique?

http://schematicsdiagram.blogspot.com/2011/12/car-will-not-run-after-resetting.html

VAN emits whitish bluish smoke and bad fuel smell from exhaust

http://schematicsdiagram.blogspot.com/2011/12/van-emits-whitish-bluish-smoke-and-bad.html

Car cigarette lighter fuse blows out?

http://schematicsdiagram.blogspot.com/2011/12/car-cigarette-lighter-fuse-blows-out.html

CD MECH ERROR?

http://schematicsdiagram.blogspot.com/2011/12/cd-mech-error.html

Car will not go into 4WD high or 4WD low?

http://schematicsdiagram.blogspot.com/2011/12/car-will-not-go-into-4wd-high-or-4wd.html

Truck is hard to start and Emits smoke while starting?

http://schematicsdiagram.blogspot.com/2011/12/truck-is-hard-to-start-and-emits-smoke.html

Engine cuts out at 3000 RPM?

http://schematicsdiagram.blogspot.com/2011/12/engine-cuts-out-at-3000-rpm.html

Car turns over but will not start, only makes clicking sound?

http://schematicsdiagram.blogspot.com/2011/12/car-turns-over-but-will-not-startonly.html

Catalytic Converter glowing hot?

http://schematicsdiagram.blogspot.com/2011/12/catalytic-converter-glowing-hot.html

After getting car washed, check engine light is ON and key less entry not working, tried reprogramming. Also car shows fuel pressure?

http://schematicsdiagram.blogspot.com/2011/12/after-getting-car-washedcheck-engine.html