Speedo Help

[gpintler]

My Speedo quit working. I took the circuit board to work and resoldered chips. I thought that that would fix it but NO luck .

Does anybody know of a source for the stepper motor ?

 

[Darkbloodmon]

I would recommend shipping the unit out to a specialist rather than trying to source a part as specific as that. You could try sourcing a cluster out of a third gen ram truck and taking it apart for the bits and attempting to make it work. But that's a grey area of weather it would or not. Example being, a 3rd gen 06 and up cluster plugged into an early 03 04 truck will pop nearly every fuse and potentially damage the ECU.

 

[Yo Hoot]

How does it recieve data? Is there a physical speed sensor or wire that is the issue? You could take it to a dealer and gave them hook it up.

 

[p-Bar]

The sensor is up on the rear differential .

 

[bcbender]

Doesn't the speedo sensor on the rear axle housing also the pickup for the ABS? Would it not also have a ABS light on if that sensor was INOP?

 

[p-Bar]

Bcbender you are correct

 

[Darkbloodmon]

Speedo quit working

My mistake, by speedo I thought you meant your whole cluster, not the individual gauge.

If you want to confirm your cluster function you could've used the built in diagnostic procedure(actuator test) without removing it and just writing down the codes that appeared on the display.

To perform the actuator test put the key in the off position, hold the trip odometer button down, turn the key to the run position and release the trip odometer button. The cluster will begin its function test of its circuitry, gauges, and indicators. If you have codes record them down and refence the code chart. 03, 04, and AC are ABS related. 8J-12 through 14 in the FSM for 03 trucks have the code reference chart.

Additionally from the 03 FSM in regards to the speedo gauge itself
"• Communication Error - If the cluster fails to receive a speedometer message, it will hold the gauge needle at the last indication for about three seconds, or until the ignition switch is turned to the Off position, whichever occurs first. After three seconds, the gauge needle will return to the left end of the gauge scale."

Did you notice this?