How do you tell if your alternator is broken?
7 Signs of a Failing Alternator
- Dim or Overly Bright Lights.
- Dead Battery.
- Slow or Malfunctioning Accessories.
- Trouble Starting or Frequent Stalling.
- Growling or Whining Noises.
- Smell of Burning Rubber or Wires.
- Battery Warning Light on Dash.
What causes an alternator to run very hot?
Alternator running very hot. ABS pump not an issue, pulled the fuse and have the same result. Alternator running hot to the point where you cannot touch it and this is my third alternator. Have installed one new battery and everything was good for an hour then it seemed that something cut-in and now running hot again.
What happens if the alternator light burns out?
If the light burns out no current can flow to the exciter. This would make it seem the alternator is bad but the real trouble is within the wiring to it. The No.2 wire is for the battery sense lead of the regulator inside the alternator.
What is the No.2 wire on an alternator?
The No.2 wire is for the battery sense lead of the regulator inside the alternator. So the alternator knows how much power is needed to keep the battery charged up to a normal level. You have already found out about the dangers of removing the battery lead while the alternator is working.
What should I do if my alternator is not working?
One other test you can do safely is to measure the voltage drop across the main output wire of the alternator. This test will allow to see how much voltage loss you have between the alternator output and the battery.
What causes an alternator to get really hot?
High voltage, bad diode, improper alt fan, bad bearing , defective heat sink ,high voltage drop accross alt power wire or ground wire . A few places to check alternator fan, now why didn’t I think of that?
Is there a bad fuse in my alternator?
The car runs fine when connected to my truck via jumper cables, but acts as one would expect when there are alternator problems. I have checked all fuses in the fuse box, to include the 10a “GEN/BATT” fuse that I have been told is the alternator fuse. I have not found any to be bad.
Why does my alternator not get enough power?
I have narrowed it down to something not causing the alternator to get power because i have done the following: Autozone tested the alternator twice and both times reported good. They also tested the battery to be good (it’s only a few months old). Tested the continuity of the wire that runs from alternator to battery and that is good.
How many ohms does an AutoZone alternator read?
Autozone tested the alternator twice and both times reported good. They also tested the battery to be good (it’s only a few months old). Tested the continuity of the wire that runs from alternator to battery and that is good. It read around .5 ohms.