My truck abs light came on and i noticed that the volt gauge was low and the service engine light came on. I bought a new Altnator and the same thing but the engine light went out. so i also bought a new battery. Still the same thing, Could this be a regulator or the cables maybe?
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Replacing a fuel pump has nothing to do with instrument cluster lights or the clock staying on. Unless you shorted wires , did you disconnect the negative battery cable before hand ?
The body control module (BCM) performs the following functions:
• A/C compressor request
• A/C cooling fan
• Exterior and interior lighting control
- Daytime running lights (DRL)
- Automatic lighting control
- Fog lamps
- Interior lighting
• Battery rundown
• Gauge control
• Instrument cluster indicator control
• Fuel gauge control
• Temperature gauge control
• Theft deterrent
Interpreting all of the driver warnings sent by the control modules on the class 2 serial data line
Sending the information to the instrument cluster in the form of a SPI serial data bus message
The following list of messages are sent by the BCM to the instrument cluster:
• Fuel gauge position
• Temperature gauge position
• Oil pressure
• Low engine coolant
• Check oil
• High beam
• Low fuel
• High temperature
• Washer fluid level low
• SERVICE VEHICLE SOON
• Door ajar
• Seat belt
• THEFT SYSTEM
Check the fuel level sensor wires , the fuel level sensor is a input to the BCM .
You definitely have a problem with the charging system. As it is, the engine and other electricals are running your battery down. You need to put a voltmeter on the battery with the engine running to verify no charging. When the alternator is working and charging, the voltage will be about 14 volts, or somewhere between 13.5 volts and 14.5 volts. It may not even crank the engine over fast enough to start if your battery voltage is now under 12 volts. Then you would need a boost, but if alternator is not working, what charge you now have in your battery may be quickly depleted and the engine will shut down.
Test the alternator as I stated, or take it off and have it tested at a parts store.
the low charge # @ gauge could be caused by bad ground or high resistence in the wireing harness. Don't think it has anything to do with your 4x shifting prob I would check 4x switch and electric motor on transfere case.
charge it up .crank engine while its idling get a volt meter hook it to battery .volts should be 13.5 to 14.5 if its 12 to 10 or lower.alternator is not charging.if alternator is charging . turn engine off battery should stay 12.5 volts if it drops after engine is off to 11.0 or 10 volts battery weak replace it.
Your chg light is your charging system. It could be your alternator, battery, cables, wires etc. Generally pretty easy to diagnose with a multimeter. To check the alternator the old fashion way, you can start the car and disconnect the battery while it is running. If the engine stops then the alternator definately has a problem. This is not recommended as it is much safer to use a multimeter.