03 Silverado Cluster just Odometer blank

[borshch]

2003 Silverado odometer - information display in the cluster was dim than it completely went blank. Everything else works except this display. How can this be repaired ?

[KALNAJJAR01]

2003 Silverado odometer - information display in the cluster was dim than it completely went blank. Everything else works except this display. How can this be repaired ?

Check if any fuse control the cluster
Check at the back of the cluster power ground too via plug


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[ascrap2003]

Search the forum Silverado or GMT800 you'll find what you need!

[borshch]

Search the forum Silverado or GMT800 you'll find what you need!

Searched.

found that mosfet or transformer might be bad. But which one ?
And idisplay might not be getting power. But what needs to be fixed to get power to display ?

Also found that most just replaced the entire cluster. And that's what I usually do, but other guys know how to fix this instead of replacing the whole cluster.

[ascrap2003]

Searched.

found that mosfet or transformer might be bad. But which one ?
And idisplay might not be getting power. But what needs to be fixed to get power to display ?

Also found that most just replaced the entire cluster. And that's what I usually do, but other guys know how to fix this instead of replacing the whole cluster.

Mosfet I believe is only for the 07-13 Trucks but I maybe wrong as usual, 03-06 you should have 6 or 7 small smd resistors just above and/or left of speedo stepper, did you reflow/solder those?

[mecjp]

Mosfet I believe is only for the 07-13 Trucks but I maybe wrong as usual, 03-06 you should have 6 or 7 small smd resistors just above and/or left of speedo stepper, did you reflow/solder those?

as ascrap2003 said check this resistor at left back of board and you will see some sign of black overheat on soldering point, just resolder that and try to power up on bench! if u not sure post a picture! good luck.

[borshch]

Mosfet I believe is only for the 07-13 Trucks but I maybe wrong as usual, 03-06 you should have 6 or 7 small smd resistors just above and/or left of speedo stepper, did you reflow/solder those?

those are only for the shift indicator display (PRND321). But I need to fix the other display the one that shows odometer, trip, messages.

[borshch]

as ascrap2003 said check this resistor at left back of board and you will see some sign of black overheat on soldering point, just resolder that and try to power up on bench! if u not sure post a picture! good luck.

The back of the board doesn’t have any resistors or any components.

Ill post photos soon

[clusters]

For starters, power up the bad one and a good one and do voltage tests to compare, like we all did when learning. Read up on MOSFETs, specifically n-channel, yes they are used in the early ones as well. The transformers rarely fail, but your problem is most likely in the same area which is the DC to AC converter circuit.

[ascrap2003]

[QUOTE=clusters;3156335]For starters, power up the bad one and a good one and do voltage tests to compare, like we all did when learning. Read up on MOSFETs, specifically n

None of which i've done yet besides mosfet testing NPN
heres another hint NPN = Negative Postive Negative
and for the noobs and slower guys like myself heres a easy
way to understand circuit components.

We'll use plumbing and water flow to understand

Resistor is pretty much like a flow regulator/larger pipe into a smaller one
Diode is basicly a check valve
Mosfet is a type of Transistor which in turn is another kind of diode think of a tee with a ball valve and check valve on each of 2 outlets

[mecjp]

The back of the board doesn’t have any resistors or any components.

Ill post photos soon

check this video at 13 minutes, i make mistake is on the other side hope this will help https://youtu.be/vStMcCHZuRM

[borshch]

check this video at 13 minutes, i make mistake is on the other side hope this will help https://youtu.be/vStMcCHZuRM

In video only shows repair of prnd display not of Odometer - info display

[rrador]

resoldering resistors should fix odometer display also. Have done many and it worked. Just did one few days ago.
Never had one of these that needed anything else other than resolder resistors. Also keep in mind once you remove needles you'll probably break some stepper motors.
When I open these I always replace all stepers and bulbs...