Can a bad alternator cause fuses to blow?
The alternator can develop an internal short and blow the fuse in the electrical cable between it and the battery.
Where is the fuse for the alternator?
Although all cars don’t have an alternator fuse in them, the vast majority of them do. Alternator fuses are put into place to allow an alternator to operate. They’re small fuses found in the fuse boxes of cars that control alternators and help to keep them up and running.
What causes a mega fuse to blow?
Blown mega fuse is a dead short or crossed wires. Could have the cables crossed, internal short on the alternator or starter but if its blowing that as soon as you touch the cables it’s a big short.
Does the PCM control the alternator?
The PCM sends a 5-volt, variable duty cycle signal to the terminal to control the alternator voltage set point.
What happens if Mega fuse blows?
If a MEGA fuse blew, the car likely would not operate at all because these fuses protect critical, high current circuits, ones important to keeping the car’s electrical system operating. If a fuse (of any type) fails, that causes the circuit to instantly open and then no power flows.
How to tell if your Toyota RAV4 has an alternator problem?
Eventually the warning light will go on letting you know that the battery is not charging. Being aware of the smells and sounds that your Rav4 makes is a great way to notice when something has gone wrong, and help you identify any potential alternator problems.
What should the voltage be on a Toyota alternator?
Turn the key, and I get nothing, not even a click. I check the battery voltage, read 13.1 volts, so I am fine there. I have lights, radio, door chime, etc. Next I check the alternator to make sure it’s hooked up correctly, and it is. I’m getting frustrated at this point, but decide to check the fuses.
Why does my Toyota RAV4 have a dead battery?
It’s a warning light that indicates that the voltage in the battery is not sufficient. The alternator may be charging still, but just not enough to cover the electrical needs of your Rav4. A dead battery is the end result of an alternator not charging enough.
What to do if your alternator blows fuse?
From there, I had to push in all the tabs on the side of the fuse box to separate it so I could gain access to the screws holding the fuse blades to the terminals themselves. Once in half, I had to fish my a socket past the mess of wires inside the box, and unscrew both terminals.