Posted to Technical Tips Forum on 9/29/2010
29 Replies
Iam sure we all have seen these GM clusters where the
speedometer or one of the other guages sticks,jams,or doesnt
work.Iam going to show the procedure how to replace these
old stepper motors with a new one.
First let me show you the customer complaint. [2004
Pontiac Montana, Video] Now that we have verified the
complaint, you must remove the cluster and take off the
black platic covers from the back and front of the cluster.
Once you have the gauge needles accessible... perform this
task [2004 Pontiac Montana, Video] Then you need to
seperate the front cluster board from the main circuit board
as shown here [2004 Pontiac Montana, Video]. Once the
circuit board is seperated then we can see the old binding
stepper motor [2004 Pontiac Montana, Video].Here is a
video of the new motor and part # [2004 Pontiac Montana,
Video] .
Here is video showing the 4 small contacts that need to be
de-soldered as so we can remove the old stepper motor
[2004 Pontiac Montana, Video] This is the soldering iron I
like to use when doing soldering. [Soldering Iron] Once
the de-soldering is done we can see the old stepper motor
removed from the board [2004 Pontiac Montana, Video]
Then next we need to install the new motor and slightly bend
over the tabs to lock the motor in place for soldering
[2004 Pontiac Montana, Video] Now here is the new motor
installed after being soldered in place [2004 Pontiac
Montana, Video] Here is a video of the completed
soldering.[2004 Pontiac Montana, Video] Now we must
re-install the gauge needles [2004 Pontiac Montana,
Video] and finish assembling the rest of the plastic
covers.
Now its time to Test the repair [2004 Pontiac Montana,
Video]
If you need to calibrate the needles for positioning you can
use the scan tool to compare the vehicle speed to what the
cluster indicates. (Same applies to the other gauges). Or
one could even use a GPS which shows current speed for
comparison.
Kevin from Manitoba
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