Caprice Classic (1996) Digital Speedometer Fix

by jpoint in Workshop > Cars

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Caprice Classic (1996) Digital Speedometer Fix

bezel screws.jpg
Caprice Classic Digital Speedometer has GONE DARK!!
Now how fast am I really going?!
(OK so the picture shows it working, because I took the pictures after fixing the problem)

Sometimes it starts working again at random, most of the time its black.

Don't bother taking it to the garage. Don't fear having to completely remove the dash to fix it.

In about an hour (or less) you can fix it yourself, no need for parts, no special GM tools!

You will need:
T15 Torx screwdriver
7mm nut driver
soldering gun (optional)
solder (optional)
Petroleum jelly
rubbing alcohol
cotton swabs
napkins/paper towels
pose-able thumbs
1.5 elbows in each arm (or just one arm will do)
pillow

Remove Gauge Bezel

outer bezel.jpg
Remove two screws with 7mm nut driver.
Pull bezel to remove (bottom has spring clips)

More Screws!

cluster screws.jpg
Remove gauge cluster screws (four) using 7mm nut driver.

Remove Even More Screws

inner bezel.jpg
light cover bezel dressing.jpg
tinted lens installed.jpg
tinted lens.jpg
Now remove the perimeter screws (eight) holding the gauge cluster lens.
(This step eliminates the need to remove the entire lower dash panel)
Then the cluster ring/trim
Then the gauge face trim.
Then the tinted speedometer lens

Then you can remove the cluster itself through the dash opening.

parking dial.jpg
Remove the shifter indicator clip from the steering column collar under the dash.

remove install display.jpg
remove screws.jpg
Once the cluster is out:
Remove the four screws to remove the display.
Be careful it is actually made of GLASS.
Don't make them like that anymore.

bad contacts all.jpg
bad contacts 2.jpg
bad contacts.jpg
base contacts.jpg
Once the display is out, flip it over.
There it is!
The little spring contacts has driven right into the solder contacts on the back of the display circuit board.

This loose connection causes the digital display to be faded or completely blacked out.

The next steps will be what I did to repair them. You could try just cleaning them or slightly sanding them but the material is missing and in my opinion the best way would be to build up the contact points to press down the spring contacts in the cluster base making a better connection.

soldering.jpg
too hot.jpg
too much solder.jpg
Adding solder to the contacts of the digital display.

Be careful when using a standard soldering gun.  For circuit boards it tends to get hot quickly (as you will see I accidentally overheated one of the contacts and it came right off! - it wasn't used anyway)

Adding solder carefully, contacts are not evenly coated and some built up quite a bit.

A smaller tip or soldering iron would be easier (but not necessary)

file excess solder.jpg
base contacts.jpg
repaired contacts.jpg
Sand the contacts down with nail file.

Lightly sand contaminants off the spring contacts too.

All better!  smooth and flat (slightly raised) contacts

clean alcohol.jpg
apply vasaline.jpg
cleaned and coated.jpg
Clean everything up with cotton swabs and alcohol.

Then a little petroleum jelly to prevent any future corrosion.

test first.jpg
Do a test in the car with the display and cluster to be sure its fixed.

tinted lens.jpg
tinted lens installed.jpg
IMG-20120514-00610.jpg
clear lens.jpg
Installation is reverse of removal

digital display 4 screws

tinted lens

cluster trim face

cluster trim ring

clear lens then the eight screws to hold it all together

plus the four screws to hold the cluster in place.

then test it again.

parking dial.jpg
useless access door.jpg
Don't forget the shifter indicator cable.

This is where you need the 1.5 elbow and pillow.

No sense in removing the access panel under the steering column, there's a steel bracket there blocking access.

Use the pillow, place it on the floor at the pedals.

Recline the seat fully.

get in the car upside down and place the clip on the shifter collar

bezel remove replace.jpg
Back together and works great!