Either a bad ground to the guage itself or a bad voltage regulator in the alternator. While the enigine is running check the voltage at the battery it should be around 13.5volts if it constantly fluctuates then the voltage regulator is probably bad. Replace the alternator. Otherwise make sure your grounds are good.
The voltage gauge on the Blazer is not the most accurate (cheap) When using the signals the voltage draw on the system is enough to make the gauge move slightly.
Electrical connection issue.
it would cause a certain lamp to be going on and off. (flickering )
I think the cause of ripple voltage would be from a bad ground or capacitve voltage.
bad voltage krunkbobulator
A common cause for a gas gauge to stop working in a 1994 Ford Aspire is a defective fuel gauge. Lose wiring in the dash is another cause.
The battery gauge in a vehicle will move when you use your power mirrors as your causing a small drain on the battery & lowering the voltage slightly. The effect is normally only really visible when the engine is not running.
Defective voltage regulator.
A potential bad gauge or sender unit in the tank would cause it to read full all the time.
Bad voltage regulator
It would if the battery voltage was lowered enough to cause it not to fire.
Have the alterntor and voltage regulator checked.
the RMS value of ac voltage is equivalent in power to the exact same DC voltage. This will cause the same amount of heating in a resistor.
Well, kinda need to know if it did anything else. If the vehicle continued operating at normal, probably a fault voltage gauge or regulator. If you actually lost all power, the whole thing would shut down. If it was a temporary loss of power, then it kicked back to normal, you're probably looking at a loose or faulty ground wire.
defective voltage regulator
the voltage regulator
A low coolant level could cause the temp gauge not to read correctly. A faulty temp gauge sending unit could also be the cause. The coolant leak, you would have to find the source of the leak to determine the cause.
temperature gauge not working can be caused by a bad temp sensor in engine, a bad gauge in dash, or a bad fuse
Cause it doesn't have one
you tell me then we will both know.
Several things can cause your fuel gauge not to work. The most common cause is a bad ground wire. A malfunctioning float in the fuel tank can also cause the problem.
10 volts applied to 5 ohms would cause a current flow of 2 amperes. Current = voltage divided by resistance.
High resistance on the feeder to the load will cause voltage drop at the load end of the circuit. If this is happening, do the calculations for voltage drop, using the amperage of the load, voltage of the load, the size of the wire feeding the load and the distance from the distribution panel to the load.
A faulty thermostat might cause the temp gauge on the 2000 Nissan Altima to raise to hot when the car is not overheating. A faulty thermostat can cause the gauge to move up and down and might even turn the fan on.