Bad CCM?
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 207
From: Orlando FL
Does the fuel & trip display anything?
Its a possibility the CCM is bad. Or bad connections or grounds in the instrument panel.
Last edited by pcolt94; Dec 13, 2017 at 12:19 AM.
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 207
From: Orlando FL
I would not think the VSS would be bad because that’s like saying if you stopped the car the displays go blank, makes no sense.
I would give Batee a call on the phone just to see if he has ever repaired a instrument panel like yours for a similar repair. You might get a direction before you start taking things apart. I think it's a good chance the CCM is bad but substitution might be the only way to really find out but would accumulate as much information as I can before I bought a CCM.
http://batee.com/
573-578-9590
I would give Batee a call on the phone just to see if he has ever repaired a instrument panel like yours for a similar repair. You might get a direction before you start taking things apart. I think it's a good chance the CCM is bad but substitution might be the only way to really find out but would accumulate as much information as I can before I bought a CCM.
http://batee.com/
573-578-9590
Safety Car
Joined: Jun 2010
Posts: 4,564
Likes: 1,677
Replace the CCM. If you have a spare you can plug it in and not worry about not starting the car due to a VATS error. You are just looking to see if you get an odometer/tripometer/mpg/range functionality back. The CCM controls all of those functions.
Last edited by ChumpVette; Dec 14, 2017 at 01:42 AM.
Thread Starter
Instructor
Joined: Nov 2017
Posts: 174
Likes: 1
I would not think the VSS would be bad because that’s like saying if you stopped the car the displays go blank, makes no sense.
I would give Batee a call on the phone just to see if he has ever repaired a instrument panel like yours for a similar repair. You might get a direction before you start taking things apart. I think it's a good chance the CCM is bad but substitution might be the only way to really find out but would accumulate as much information as I can before I bought a CCM.
http://batee.com/
573-578-9590
I would give Batee a call on the phone just to see if he has ever repaired a instrument panel like yours for a similar repair. You might get a direction before you start taking things apart. I think it's a good chance the CCM is bad but substitution might be the only way to really find out but would accumulate as much information as I can before I bought a CCM.
http://batee.com/
573-578-9590
Team Owner
Joined: Dec 1999
Posts: 34,873
Likes: 487
From: Lacey WA RVN 68-69
NCM Sinkhole Donor
The CCM retains the vehicle mileage and also the VIN. If the car has the FX3 Selective Ride Control, the diagnostics are also in the CCM.
The CCM can be replaced with one from another car, but it really can't be reprogrammed for your car. So a working CCM from another car will show the mileage from that donor car along with that VIN.
There are (were?) rebuilt CCM's available that required entering VIN and mileage data using a GM Tech II. But the reman CCM's only had a 100 mile window before they lock themselves out from any programming.
Certainly check the display board for any indications of burning, melting, or loose wires. Check the connectors for loose or shorted wires.
The CCM can be replaced with one from another car, but it really can't be reprogrammed for your car. So a working CCM from another car will show the mileage from that donor car along with that VIN.
There are (were?) rebuilt CCM's available that required entering VIN and mileage data using a GM Tech II. But the reman CCM's only had a 100 mile window before they lock themselves out from any programming.
Certainly check the display board for any indications of burning, melting, or loose wires. Check the connectors for loose or shorted wires.
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