Question about 2003 Chevrolet TrailBlazer

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Electrical problems 2005 trailblazer

Speed odometer and gas gage not working thouggh there is power ther because the gas light is on and trip is working. Also lost power to drivers side window controls and electric mirror controls?

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I had a dash problem similar when the connector next to the engine fuse box was left loose by a mechanic

Posted on Jun 16, 2009

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First check the fuses in the fuse panel! If this does not correct the problem then start looking for a bad ground located under the hood on the left side of the engine block as well as on the fire wall. I do not believe that these are interconnected problems. Since the problem is apparently one sided I would look also at the ground located by the fuse panel to make sure it was not accidently loosened by kicking it when driving.

Posted on May 21, 2009

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My mph, gas, and temp gauges are not working


That's why you don't let you husband work on your car ! Unless he does it for a living .. For MPH there is a VSS - vehicle speed sensor , for the gas there is a sending unit in the fuel tank, for the temp. gauge there is a temp. sensor located in coolant stream on the engine .You more then likely need to have you instrument cluster repaired . GM had a problem with step motors inside the instrument cluster . A step motor is what controls the individual gauge. The sensors are all inputs to the PCM - powertrain control module (engine computer ) .
Engine Coolant Temperature Gage
The IPC displays the engine coolant temperature as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the engine coolant temperature. The engine coolant temperature gage defaults to C or below if:
?€¢
The PCM detects a malfunction in the engine coolant temperature sensor circuit.


?€¢
The IPC detects a loss of class 2 communications with the PCM.

Fuel Gage
The IPC displays the fuel level as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the fuel level percent. The fuel gage defaults to empty if:
?€¢
The PCM detects a malfunction in the fuel level sensor circuit.


?€¢
The IPC detects a loss of class 2 communications with the PCM.

When the fuel level is less than 14% (84ohms), the low fuel indicator illuminates.
Odometer
The IPC contains a season odometer and a trip odometer. Momentarily press the trip select/reset switch in order to toggle between the season odometer and the trip odometer. Press the trip select/reset switch for greater than 1.5 seconds, while the trip odometer is displayed, in order to reset the trip odometer. The IPC displays the vehicle mileage and trip mileage as determined by the IPC. The IPC calculates the mileage based on the vehicle speed information from the PCM. The odometer will display 'error' if an internal IPC memory failure is detected.
PRNDL Display
The IPC displays the selected gear position as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the gear position. The PRNDL display shall flash all gear positions if:
?€¢
The PCM detects a malfunction in the transmission range switch circuit.


?€¢
The IPC detects a loss of class 2 communications with the PCM.

Speedometer
The IPC displays the vehicle speed based on the information from the PCM. The PCM converts the data from the vehicle speed sensor to a 4000 pulses per mile signal. The IPC uses the vehicle speed signal circuit from the PCM in order to calculate the vehicle speed. The speedometer defaults to 0 mph (0 kph) if a malfunction in the vehicle speed sensor circuit exists.
Tachometer
The IPC displays the engine speed as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the engine speed. The tachometer will default to 0 rpm if:
?€¢
The PCM detects a malfunction in the engine speed sensor circuit.


?€¢
The IPC detects a loss of class 2 communications with the PCM.

May 22, 2016 | 2002 Buick Century

1 Answer

While driving antitheft light comes on and all the gauges go flat,car keeps runnig,want to disable system,not sure what to look for


Before doing something drastic ,have it checked out for DTC'S - diagnostic trouble codes . It may not be the anti-theft system ,gauges going flat would be more like a communication problem between modules . PCM / BCM / instrument cluster etc.. That also could cause theft light coming on . If your not sure what to look for ,take it to a ASE certified professional . You may render your vehicle useless if you don't know what your doing .
Serial Data Power Mode Master
On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle, the PMM is the body control module (BCM). The PMM receives 3 discrete ignition switch signals to differentiate which power mode will be sent over the Serial Data circuits. The 3-wire Ignition Switch table below illustrates the state of these inputs in correspondence to the ignition switch position:
Serial Data Messages The modules that depend exclusively on serial data messages for power modes. stay in the state dictated by the last valid PMM message until they can check for the engine run flag status on the serial data circuits. If the PMM fails, the modules monitor the serial data circuit for the engine run flag serial data. If the engine run flag serial data is True, indicating that the engine is running, the modules fail-safe to RUN. In this state, the modules and their subsystems can support all operator requirements. If the engine run flag serial data is False, indicating that the engine is not running, the modules fail-safe to OFF-AWAKE. In this state, the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.
Indicators and Warning Messages
Refer to Indicator/Warning Message Description and Operation .
Engine Coolant Temperature Gage
The instrument panel cluster (IPC) displays the engine coolant temperature as determined by the powertrain control module (PCM) or the engine control module (ECM). The IPC receives a serial data message from the PCM/ECM indicating the engine coolant temperature. The engine coolant temperature gage defaults to 38?°C (100?°F) if:
?€¢
The PCM/ECM detects a malfunction in the engine coolant temperature sensor circuit.


?€¢
The IPC detects a loss of serial data communications from the BCM.

Fuel Gage
The instrument panel cluster (IPC) displays the fuel level as determined by the powertrain control module (PCM) or the engine control module (ECM). The IPC receives a serial data message from the body control module (BCM) indicating the fuel level. The fuel gage defaults to E (empty) if:
?€¢
The PCM/ECM detects a malfunction in the fuel level sensor circuit.


?€¢
The IPC detects a loss of serial data communications from the BCM.

When the fuel level is less than 14 percent, the low fuel indicator illuminates.
Odometer
The instrument panel cluster (IPC) contains a season odometer and a trip odometer. Momentarily press the trip/reset switch in order to toggle between the season odometer and the trip odometer. Press the trip/reset switch for greater than 2 seconds, while the trip odometer is displayed, in order to reset the trip odometer. The odometer is calculated and stored electronically in the body control module (BCM). The BCM uses the vehicle speed information from the powertrain control module (PCM) to calculate the odometer. The odometer displays 'error' if an internal IPC memory failure is detected. The IPC stores a backup copy of the odometer value incase the IPC stops receiving a valid odometer value from the BCM.
Speedometer
The instrument panel cluster (IPC) displays the vehicle speed based on the information from the ECM/PCM. The IPC receives the vehicle speed information from the BCM via the serial data circuit. The speedometer defaults to 0 kmh (0 mph) when the following occurs:
?€¢
The powertrain control module (PCM) or the engine control module (ECM) detects a malfunction in the vehicle speed sensor circuit.


?€¢
The IPC detects a loss of serial data communication from the BCM.

Tachometer
The instrument panel cluster (IPC) displays the engine speed as determined by the powertrain control module (PCM) or the engine control module (ECM). The IPC receives a serial data message from the body control module (BCM) indicating the engine speed. The tachometer will default to 0 RPM if:
?€¢
The PCM/ECM detects a malfunction in the engine speed sensor circuit.


?€¢
The IPC detects a loss of serial data communication from the BCM.

Apr 07, 2016 | 2006 Pontiac G6

1 Answer

My brake light on dash comes on, all the odometer readings stop working and the gas gage goes down and the gas light comes on and the air stops working. What is wrong? it does this only sometimes then


You have an unusual electrical problem. There could be a loose ground wire from the dash gauges or a power wire intermittently opening. It may be cut or resting on a sharp metal part under the dash. It will take someone who looks past the obvious to locate the exact place where the problem lies.

Oct 07, 2014 | 2005 Nissan Maxima

1 Answer

2005 S Isuzu Ascender Speedometer niddle moved all the way to the right of gage and as not moved.


If the odometer is working correctly, the problem is inside the speedometer head.
The speed sensor would be on the side of the transmission if the odometer is not working.

Apr 07, 2013 | 2005 Isuzu Ascender S

1 Answer

What will cause your speed odometer gages go nuts and your brake lights to stop working?


sounds Like You HAve Ground Problem Clean the CABLE Goin to Your Battery And then Look On YouTube to See How They Do It Ok

Jun 23, 2012 | 2003 Ford Windstar

1 Answer

I have 1999 0ldsmobile van and the gas gage is stuck at 1/4 tank , also the odometer and trip don't work


The odometer/trip display in this model is a LCD display and it is burned out, it is a common fault on all GM models in this model year range. The problem can be repaired but it requires the Instrument cluster be removed form the Van and be sent out to a GM approved repair center. These repair shops are on the Internet just google GM instrument cluster repair. The cost is about $160.00 US.
The gas gauge is a separate problem, it is caused by a defective gas level sending unit inside the gas tank. TO replace the level sensor for the gauge you must remove the gas tank from the van. To do this repair you need a good hydraulic floor jack, jack stands to support the car and a good set of common hand tools and a helper if you do the job on the ground. Use great caution when working on a gas tank as the risk if fire and explosion is quite high if proper care is not taken to a avoid creating sparks. Always dicinnect the battery negative cable before starting work on any part of the car. The parts cost for this is about $200 and 4-5 hours of hard labor.

Jun 19, 2012 | 1999 Oldsmobile Silhouette

2 Answers

Odometer and trip meter light has gone out but gage lights and rheostat still works


I have the same problem as bestdad2000.
on my 2001 Buick Century the odometer and trip meter do not light up, but the rest of the instument panel does?? I have been using the trip meter for trip milelage as my gas gage has stop working properly. Help!! tclempar@yahoo.com

Jan 20, 2011 | 2001 Buick Century

1 Answer

Speedometer, Odometer, Trip Odometer stopped working


yes the transmission speed sensor has most likely failed, to confirm this have a trouble code test run

Jul 05, 2009 | 1996 Nissan Pathfinder

1 Answer

Speed,rpm,gas,odometer gauges not working


Sounds like a body control module. It is located on top of the glove box. Unfortunately, the miles are stored in this module, so you have to go to a dealer to have it programmed.

Dec 21, 2008 | 2005 Saturn L-Series

1 Answer

Odometer only works at night


THE PROBLEM IS A BAD OR SHORTED PINS OR CHIP, SO YOUR BEST BET IS THAT, TO REPLACE THE CLUSTER, SORRY.
ALL NEW CLUSTERS ARE ELECTRICAL NOW.
WHAT YOU CAN TRY IS TAKE THE CLUSTER OUT AND LOOK FOR ANY BLOWN RESISTOR OR METAL CARRIER.
IF IT WORKS AT NIGHT THE LIGHT SWITCH IS SENDING THE POWER TO THE UNIT. AT DAY TIME ANOTHER SOURCE IS SENDING POWER TO IT. SO THAT CHANNEL MAY BE BLOWN.

May 29, 2008 | 2005 Ford Taurus

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