Instrument cluster went blank

That would hard to say without hooking up a factory or some other professional scan tool an checking for codes , an checking input data to the instrument cluster . Speedo an odometer info comes to the instrument cluster over class 2 serial data network . Do you know what that is ? Your best bet ,take it to a qualified repair shop.

What make , model an year vehicle ? Most of these functions are controlled by a body computer on newer vehicle's , newer meaning 2000 on up. Sending unit in the fuel take can be a direct input to the instrument cluster microprocessor or to the PCM/ECM engine computer . If it is input to PCM/ECM this info. is sent to the cluster over a serial data network . The instrument cluster can set an store DTC'S - diagnostic trouble codes . Taking your vehicle to a qualified repair shop mite be the smart thing to do.

http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine size . Under system click on body & accessories ,then under subsystem click on instrumentation , Click the search button then the blue link.
Don't know what problem you are having , could help you out if you listed problem . The instrument cluster is a electronic module ,has a microprocessor inside . The gauges display info. come's to the instrument cluster via class 2 serial data network from the PCM/ECM - engine computer . Factory or professional scan tool can communicate with the instrument cluster , view data , read DTC'S - diagnostic trouble code's . If you don't know this , your best bet , take it to a qualified repair shop.
You won't find wires for fuel sending unit , this info. is sent to the PCM/ECM an sent over single wire class 2 data bus.

Engine Coolant Temperature Gauge
The Power Control Module (PCM) broadcasts the coolant temperature value via the class 2 serial data line. The instrument cluster compares the temperature data using a 16 point look-up table in order to determine the needle deflection. A smooth filter is used in order to secure a continuous response. The instrument cluster drives the temperature gauge to C (cold) under the following conditions:
• The temperature data is lost.
• The PCM is in a state of health fault.

Fuel Gauge
The Powertrain Control Module (PCM) broadcasts the fuel level data via the class 2 serial data line. The instrument cluster compares the fuel data using a 16 point look-up table in order to determine the needle deflection. A smooth filter is used in order to secure a continuous response. The instrument cluster may determine if a low fuel condition is present. In the event of a low fuel condition, the following conditions may occur:
• The instrument cluster shall activate the LOW FUEL indicator.
• Send a chime message to the Body Control Module (BCM).
The instrument cluster may drive the fuel gauge to E (empty) under the following conditions:
• The fuel level data is lost.
• The PCM is in a state of health fault.

Speedometer and Odometer
The Vehicle Speed Sensor (VSS) is a gear-driven permanent magnet generator housed in the transaxle. The sensor generates a sine wave output with a frequency proportional to the vehicle speed. The Powertrain Control Module (PCM) uses this information to generate a vehicle speed signal that is sent through the class 2 serial data link; the instrument cluster then is able to utilize this data for the operation of:
• The speedometer
• The odometer


Data Link Communications Operation
Class 2 Serial Data Link
The Class 2 serial data link is used so the following modules can communicate data with each other:
• The Body Control Module (BCM)
• The Electronic Brake Control Module (EBCM)
• The Inflatable Restraint Sensing and Diagnostic Module (SDM)
• The Instrument Panel Cluster
• The Powertrain Control Module (PCM)
• The Heater-A/C Control

no power on dash ???? When you turn the key on the instrument cluster warning light's don't come on ? Check engine light , ABS , air bag etc.... Looking at wiring diagrams an using a DVOM - digital volt ohm meter to test power & ground circuit's for the instrument cluster , hooking up a scan tool to see if the computers on the vehicle communicate , BCM , PCM , instrument cluster . A faulty instrument cluster can cause a crank no start problem .Bring down the class 2 serial data network . Do you know what that is ? All the modules on the vehicle talk with each other on the class 2 bus. Checking to see if the PCM is functional , check for 5volt ref, voltage at TPS - throttle position sensor .
Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine size. Under system click on body & accessories , then under subsystem click on instrumentation . Click the search button then the blue link. Check fuse's for the I/C .
https://www.autoserviceworld.com/carsmagazine/diagnosing-general-motors-communications-network-problems

Electric Testing Techniques You Need to Know

Finding out what kind of problem your dealing with is a must before trying to fix anything . If the starter engages an spins the motor , check for spark , fuel pressure , will a scan tool communicate with the PCM , BCM etc....

Do the light's on the instrument cluster work ? Fuse #24 - 20 amp location intergrated power module , under hood fuse box . Probably the instrument cluster it's self is bad , but without testing that would be a guess . Hooking up a factory or professional scan tool to view input's to the instrument cluster would be the proper way to diagnose. Gauge info to the Instrument come's over PCI serial data bus . A communication network for the control modules on the vehicle . Gauge info. come's from the PCM - powertrain control module. Your best bet , take it to a qualified repair shop ,dealer etc....

check fuses under dash and under hood

try checking fuses under dash and hood if good prob. ground wire

Here you go. Under hood fuse block
Ign. Fuse E
and
ipc/dic
both fuses are 10 amp
I hope this helps. Take care.

Checked Every fuse in the fuse box (no small task).This includes #4 - Power point Instrument Panel, #14 - Day time running lamps (auto lamps doesn't work nor does auto lock), #27 - ignition switch run feed, #35 - Instrument Cluster, #41 - Instrument Cluster, #42 - Delayed Accessory, #45 - Ignition switch run/start feed, #102 - Door locks body security module, #103 - Ignition switch, #110 - Ignition switch, & #116 - Ignition switch. But I also check all other ones as well, they all register OK. AC panel & radio work. Turn signals work. Mileage does not work, trip computer does. So, basically, everything works except auto head-lights, auto locks, and the dash cluster (no MPH, RPM, mileage display, Fuel, Temp, Tran Temp, and Oil Pressure).

If the instrument cluster is getting battery voltage, then this means that the instrument cluster needs to be replaced. Only availible at the dealer.