85 El camino Gage cluster with fuel, volt, oil pressure, water temp will work then all will stop then work again in a few days then stop again... Anybody else with this problem and whats the fix? Thanks
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NO , there is not a fuse just for those two thing's ! There are two power supply's for the whole insturment cluster . You could need a new cluster or the ECM isn't sending this info. to the cluster . Could have DTC'S - diagnostic trouble codes stored in the PCM or the insturment cluster . Without knowing how this works (insturment cluster gets it's info.) Your best bet , take it to a qualified repair shop that has the knowledge and test equipment to diagnose this problem.
Engine Oil Pressure Gage
The instrument panel cluster (IPC) displays the engine oil pressure as determined by the engine control module (ECM). The IPC receives a serial data message from the ECM indicating the engine oil pressure. The engine oil pressure gage defaults to 0 psi (0 kPa) or below if:
• The ECM detects a malfunction in the engine oil pressure sensor circuit.
• The IPC detects a loss of serial data communications with the ECM.
For the 4.2L LL8, the ECM uses an engine oil switch that is open when the oil pressure is normal and closed when the oil pressure is low. At normal pressure, the engine oil pressure gage will display 275 kPa (40 psi). At low pressure, the gage will go to 0 kPa and the low pressure warning will be displayed in the driver information center (DIC). At high pressure, the gage will display 551 kPa (80 psi). Any values between these three values are calculated values determined by the ECM.
The instrument panel cluster (IPC) displays the vehicle voltage based on the information from the body control module (BCM). The IPC uses the serial data information from the BCM to provide a voltage level indication on the voltmeter.
DTC P0522 Engine Oil Pressure (EOP) Sensor Circuit Low Voltage
DTC P0523 Engine Oil Pressure (EOP) Sensor Circuit High Voltage
Volt Gage Inaccurate or Inoperative
Install a scan tool.
Turn the ignition ON, with the engine OFF.
With the scan tool, perform the instrument panel cluster (IPC) gauges output control.
Does the volt gauge move up and down when commanded?
Check the ground points. You don't need a cluster. The cluster will not turn the radio or anything else off. I don't have the ground points for the f150. You can probably find them online. Since you're having problems on the inside, look under the dash. Common points are at each side of the cabin area by the side kick panels. Also around the steering column. Any black or black/white wire will be a ground. Since the truck keeps running, the grounds under the hood are probably fine.
unfortunately it is most likely your instrument cluster, these and several vehicles in gms lineup are pron for these failures. you will have to document the mileage and take the instrument to the dealer. i hope this helps and thanks for rating my answer
have you tried working on one problem at a time? have you check the body computer for any codes? and to also verify the bus line is ok. if you find nothing wrong with BCM or bus, try checking the speed sensor for an output signal or if the gear is bad.
when you pulled the top of the dash off did you check the cable connection to the insturment cluster. i had a similar problem where my gauges died individually including the spedo and tach. slapping the dash usually would cause the gauges to start working again, but that quit also and i had to tear the cluster out and check the conneciton. that fixed the problem.
CHECK GAGES light (1) indicates a potential engine failure(low oil pressure, low coolant, coolant overheating) has occurred. · Check gages and shut down engine. Gages should read as follows: Oil pressure 5 to 10 psi (34 to 69 kPa) at idle; Water Temp gage below 230 degrees (110 C).
· Check engine oil level (Para 2-11) if OIL PRESS gage indicates low reading. Check coolant level (Para 2-11) if Water Temp gage indicates high reading. Notify Unit Maintenance if levels are low.
If CHECK ENGINE light (2) is on, check engine oil pressure gage (3) and water temperature gage (4). If both indicate normal, proceed with mission and then notify Unit Maintenance. If either one does not indicate normal, stop engine immediately and notify Unit Maintenance