corvette c4

[CARPARTS]

Hi,

Anyone has some info how to do the dash in a Chevrolet Corvette C4 from 1990 ?

eeprom/micro in dash and/or BCM ?

Any info is welcome !

Thanks

[ALEXEI]

Hi,

Anyone has some info how to do the dash in a Chevrolet Corvette C4 from 1990 ?

eeprom/micro in dash and/or BCM ?

Any info is welcome !

Thanks

hc11a8 or 95020

[CARPARTS]

95020 in 1990 years ?
probably indeed HC11, but in dash, or is there BCU in car ?

[CARPARTS]

95020 in 1990 years ?
probably indeed HC11, but in dash, or is there BCU in car ?

[ALEXEI]

are you sure in 90 it is digital dash ?

[afitijuana]

Have done couple of them don not touch the cluster by the time this car he rimbow conector wil be toasted will give you hard time.

Tha the BCM of in center of dash behind radio will give some trouble for the space is reduced.

Incide BCm you will fond a hc11

From there UPA will do the trick easy.

[CARPARTS]

any idea about the algoritme ?

[afitijuana]

Prety easy 2 set on 3 lines you can do it with tacho calc.

Post a picture inside the BCM.

[afitijuana]

Attached is the schematic of the General Instrument 5V power supply for the digital board of the display module from an 85 corvette.

It is hand drawn and not pretty, but may be of some value. Again, this supply is totally different from the supply for the '89 corvette.

A weakness of this supply is that the switching device is gooped to one of the filter capacitors, which puts thermal and mechanical stress on the cap. One of the caps on my power supply had failed - one of the leads apparently disconnected inside the package.

I made a small heatsink for the device from a sheet of copper and didn't goop anything to the cap. This fix probably traded one problem for another, we'll see.
:bounce: