Instrument Cluster Issue

Is this the digital panel? I remember seeing posts here of other individuals having issues with the instrument panels on the W22 chassis. They either needed replaced or reprogramed by the dealer. Try doing a search on the website there should be some posts about it.

Workhorse more than likely used GM clusters. First thing to try is to remove the cluster including the connector and then plug it back in without reinstalling the cluster. That fixes some of them. Next step is to watch youtube videos on the subject, and decide if you are handy enough to follow the instructions. Last resort is to take the cluster to a GM dealer and order a replacement. If you are unable to provide the odometer reading your cluster will have to be sent in for repair/replacement. If you can provide the odometer reading it is a next day exchange usually, you will have to surrender your old one as a core.
Once you have the "new" one it usually is a plug and play. The usually means everything should work except the steering wheel controls if you have them for the radio, etc. If those don't work the dealer will have to program the function.
Please note, the above applies only to GM clusters of that era. It is a very common issue.

Be very careful about "do-it-yourself" on this issue. I once had a car (Ford Taurus) that had the instrument cluster die. I had it replaced, but not by a dealership. The shop didn't do all they were supposed to do in terms of re-setting the odometer in the new one. When I went to trade that car in, I was told that it had virtually no value because the mileage couldn't be verified. Maybe I got hosed, but that's how it played out for me. So be careful. Don't do what I did.

-Speak

On the off chance that you have a built-in rear camera? If so..that may be the culprit. On pretty much all vehicles now, if the camera goes, so do many of the mentioned controls.


Gary Haupt

The dash is digi-log, (Digital but analog displays) run by the engine control computer.. Several possible issues but if you read your owner's manual there is as TEST procedure. (I'm not in the motor home so I don't have the manual handy) but you hold a button or two and turn on ignition. The gauges should cycle in a pattern (Mid scale, full scale, zero, mid full zero or something like that) alarms will sound lights will flash, Then you turn off and back on. Failure to do the pattern = Proglem.

Possible issues include bad ground, bad connection, bad computer, bad display.


ONE issue I had with SOME gauges ONCE.....

Since this is all computer controlled.. when you first turn the key it does a POST (power on self test) Well I got into START before POST finished and as a result selected gauges did not work.

Since all the gauge indicators don't work, I'd suggest to see if there is power to the cluster and if there is a continuous ground where needed. Fuel level, engine temp, and a few others are typically not passed through any computer.

PS the AC Delco speedo repair centers set the mileage before they ship. That's why if the odometer is not readable you must send it in. They have other ways to get the mileage. They follow all federal laws about odometer readings. I handled thousands of these transactions at the GM and FCA dealer level. GM sold their medium duty division to Workhorse about 1996. Some GM dealers are also Workhorse dealers but not all. More than likely one gauge stopped working first and then more or all. See Youtube videos if only to help you understand the problem with these clusters, only the GM ID and number on the back will tell you for sure if it is one of the ones I reference. A high end scan tool will also pull the number for you. GM Tech 2, Snap On Solus for example.

Some what common failure item on the Workhorse chassis. There is a Workhorse sub-forum on irv2, may want to check it out.

Gauge Cluster