"90" Instrument/LCD problem
05-18-2007, 07:09 PM
#1
Racer
Thread Starter
"90" Instrument/LCD problem
I'm hoping someone one can help me on this... After starting/boosting my car after winter, the first time driving it the LCD starting throwing random numbers. I checked for codes from the CCM and found no codes other than the C12. I changed out my battery and checked the voltage off my alternator (steady at 14.89V) at different engine speeds.
I followed the instructions in the FSM, checked the grounds, all ok. The FSM said to replace the cluster, I did and the replacement cluster is doing the same thing. The only other thing I can think of is a faulty CCM, as sometimes the C68 heater controls go from the "OFF" selected position to auto, no matter how many times I select the "OFF".
I'm pretty much out of ideas, can anyone help? How much is a CCM?
I followed the instructions in the FSM, checked the grounds, all ok. The FSM said to replace the cluster, I did and the replacement cluster is doing the same thing. The only other thing I can think of is a faulty CCM, as sometimes the C68 heater controls go from the "OFF" selected position to auto, no matter how many times I select the "OFF".
I'm pretty much out of ideas, can anyone help? How much is a CCM?
06-08-2007, 08:56 PM
#2
Racer
Member Since: Feb 2007
Location: I am the chick magnet. not the corvette.
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I'm hoping someone one can help me on this... After starting/boosting my car after winter, the first time driving it the LCD starting throwing random numbers. I checked for codes from the CCM and found no codes other than the C12. I changed out my battery and checked the voltage off my alternator (steady at 14.89V) at different engine speeds.
I followed the instructions in the FSM, checked the grounds, all ok. The FSM said to replace the cluster, I did and the replacement cluster is doing the same thing. The only other thing I can think of is a faulty CCM, as sometimes the C68 heater controls go from the "OFF" selected position to auto, no matter how many times I select the "OFF".
I'm pretty much out of ideas, can anyone help? How much is a CCM?
I followed the instructions in the FSM, checked the grounds, all ok. The FSM said to replace the cluster, I did and the replacement cluster is doing the same thing. The only other thing I can think of is a faulty CCM, as sometimes the C68 heater controls go from the "OFF" selected position to auto, no matter how many times I select the "OFF".
I'm pretty much out of ideas, can anyone help? How much is a CCM?
06-20-2007, 09:49 AM
#3
Burning Brakes
Member Since: Oct 2004
Location: Weymouth Dorset
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I had the same problem with the display on my 90 after it had been laid up over the winter, but after a while it cured itself 
GM don't you just love it
GM don't you just love it
07-30-2007, 04:37 PM
#5
Melting Slicks
I'm hoping someone one can help me on this... After starting/boosting my car after winter, the first time driving it the LCD starting throwing random numbers. I checked for codes from the CCM and found no codes other than the C12. I changed out my battery and checked the voltage off my alternator (steady at 14.89V) at different engine speeds.
I followed the instructions in the FSM, checked the grounds, all ok. The FSM said to replace the cluster, I did and the replacement cluster is doing the same thing. The only other thing I can think of is a faulty CCM, as sometimes the C68 heater controls go from the "OFF" selected position to auto, no matter how many times I select the "OFF".
I'm pretty much out of ideas, can anyone help? How much is a CCM?
I followed the instructions in the FSM, checked the grounds, all ok. The FSM said to replace the cluster, I did and the replacement cluster is doing the same thing. The only other thing I can think of is a faulty CCM, as sometimes the C68 heater controls go from the "OFF" selected position to auto, no matter how many times I select the "OFF".
I'm pretty much out of ideas, can anyone help? How much is a CCM?
