98+ Ram Instrument Panel Test

920: The cluster is not receiving a vehicle speed message from the PCM.

1. Check the PCM software level and reflash if required.
2. Use a DRB III scan tool to verify that the vehicle speed message is being sent by the PCM.

921 - The cluster is not receiving a distance pulse message from the PCM.

1. Check the PCM software level and reflash if required.
2. Use a DRB III scan tool to verify that the distance pulse message is being sent by the PCM

999 - An error has been discovered.

1. Record the failure message.
2. Depress the trip odometer reset button to continue the Self-Diagnostic test.

 

Dusterb318 do u know for how much does a DRB III scan tool cost. Thank you

 

I have seen them for $100 or so. Most parts stores will carry them. I just looked those codes up online.

 

Randy. I had the exact same thing happen in my 97. Its a fuse in the fuse block that blows that powers the ECM. Double check them all with a flashlight behind them so you can clearly see any breaks in the filament.

Mine turned out to be the fuel shutoff solenoid, and I replaced it with a cable. I didn't see if your 98 was a 12v or 24v. If its a 12V, it MIGHT be the solenoid, but it could be anything. The ECM controls the voltage regulator (making it not charge) the gauges, and in the 98, the transmission solenoids... So thats what it is without question.

If a fuse is blown, its the PCM fuse, which also powers the shutoff solenoid lift relay (at least in 97's). Unplug the solenoid, replace the fuse, tie the fuel shutoff arm up and see if it starts. I have a strange feeling its a very likely solution. But who knows... Its electrical.

 

Hey guys I have the same issue posted here....followed the advice given to Randy
..however no power to ECM...any thoughts

 

A Dodge DRB scan tool is about $5K

Your talking about an OBDII code reader.

 

Checked the Engine Speed Sensor? This is what caused everything in the cab of my 98 12valve to die ... no gauges and the alternator wouldnt charge. There was also a high amp fuse under the hood that was blown ... but my ESS was definitely the major problem. On the 12 valves its mounted just behind the crank pulley at about the 10 o'clock position looking at the crank from the front of the truck

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Link to part on napa website: (just put in your zip code, select a store, then the part will show up)

Store Locator | NAPA Online

 

No, I haven't checked that as of yet. However did check power at the pin connectors coming from the fuse block. Everything checks except PIN #12 on blk/grey connector which according to info I read on another thread, should have 12V with key on. This has a green/black lead wire. How would I check the engine speed sensor, do I have to have the scan tool to perform this check?

 

If you disconnect it and most of the gauges come back to life then the speed sensor is the problem.

 

I did disconnect the crank position sensor and even picked up a used one from a scrap yard locally. However, no change. The engine speed sensor your mentioning is it the same device or am I looking for a different one.