95 Digital Readout

[Gorgon]

Occassionally when driving the LCD goes totally wacko and gets all jarbled. This usually happens where there is a sharp jolt to the car from bumps in the road, road reflectors, etc. A sharp rap to the display brings it back in line. The previous owner said he just had it replaced. This leads me to believe that it is just a matter of a ground loosing connection on the connector, possibly some minor corrosion on the connector. Any thoughts before I tear into the dash?

 

[vigman]

Hmmmmmmm

Could you be more specific on what was actually replaced... do you have his invoice?


Is it just the center section... or the whole instrument cluster?



Vig!

 

[Gorgon]

I don't have his invoice.

And yes, it's just the center digital portion of the display.

 

[vigman]

Are any codes set?

The ground for the dash ( center section )
LCD power ground is on pin A-7

This is circut 150

Then goes to gnd #203
( internal of harness..I think)
Then to BODY GND #201, up under the dash right side @ top of where a kick panel would be.

BTW this is the book fix... check this grn first!

Vig!

 

[Gorgon]

Since I'm new to vettes all of two weeks now, I'm not sure how to check codes. How would I know if one was set? Would I need a code reader?

Doesn't seem to be much in the owner's manual and I haven't received my service manual yet.

 

[vigman]

Try this

http://corvetteactioncenter.com/forums/showthread.php?s=&threadid=8127&highlight=DTC

Vig!

 

[vigman]

Or this

Reposted from Cruise... who got it from Rabbit




I don't know if this will work on your '96, but on my '94, I had the key turned off, took a paperclip and connected the #4 and # 12 pins, then turned the key on and wrote down my error codes.

I posted this issue on July 25th, titled Error codes on OBD2 for a '94.
Here is one of the responses that I recieved.

It might work for you




The procedure Cruise used will work on a 95. The 16 pin connector is numbered left to right, 1 thru 8. The bottom is, left to right 9 thru 16. Ground pins 4 & 12 & then turn ignition "on" but not to start.
After turning the ignition on the CCM will display any DTC"S & the module to which they apply in an automatic display sequence. The CCM is module 1.
The PCM/ECM is module 4. The ABS/TCS EBTCM is module 9. The DERM is module A

During display each DTC is displayed for 3 secs, The end of the DTC list for each module is indicated by "___" being displayed in the speedo..



A C-12 indicates no stored DTC"S for the CCM.

When all DTC"S have been displayed the trip monitor will display 1.0 & the speedometer will be blank.

 

[vigman]

There was a recall for a similar problem

Look in the CAC Knowledge base...under electrical... this MIGHT be the first signs of this problem.


Vig!