Can a low voltage alternator cause transmission problems?
Can a low voltage alternator cause transmission problems?
If your alternator’s voltage stays consistently below the required output, the transmission may alter programming to keep the engine rpm low to reduce load on the engine. Alternatively, some transmissions may have programming to lock the engine into a lower gear than it should to raise engine rpm and alternator speed with it.
Can a bad alternator cause a bad battery?
But, before you condemn it, run a voltage drop test between the alternator and battery. GM typically runs a fusible link wire between them for overload protection and they can go bad, mimicking a bad alternator. A voltage drop of .25 volts or less is Ok and the alternator is bad.
What should the voltage be on a GM alternator?
GM typically runs a fusible link wire between them for overload protection and they can go bad, mimicking a bad alternator. A voltage drop of .25 volts or less is Ok and the alternator is bad. A voltage drop of .5 volts or more means the wire is bad.
Why is the voltage reading on my alternator going up?
While watching the voltmeter display, start wiggling wires at the back of the alternator, the battery, and the remote voltage regulator (if there is one). If the voltage reading on the meter display goes up while wiggling one of the wires, you’ve found a bad electrical wire or connection.
If your alternator’s voltage stays consistently below the required output, the transmission may alter programming to keep the engine rpm low to reduce load on the engine. Alternatively, some transmissions may have programming to lock the engine into a lower gear than it should to raise engine rpm and alternator speed with it.
But, before you condemn it, run a voltage drop test between the alternator and battery. GM typically runs a fusible link wire between them for overload protection and they can go bad, mimicking a bad alternator. A voltage drop of .25 volts or less is Ok and the alternator is bad.
GM typically runs a fusible link wire between them for overload protection and they can go bad, mimicking a bad alternator. A voltage drop of .25 volts or less is Ok and the alternator is bad. A voltage drop of .5 volts or more means the wire is bad.
What causes an alternator to go over base voltage?
If you are getting more than 2 volts above base voltage, most likely your alternator is over-charging the battery or the battery is faulty. Other potential problems are a faulty voltage regulator or a problem in the charging system wiring.
