Rep Power: 0

sup everyone

I checked the battery voltage while the car is on its 12.6v or less.
When I drive it it makes a loud whining noise. not from the stereo..i can hear it coming from the engine bay. The battery light is not on.
You guys think i got a bad alternator? i have checked all fuses.

I might drive it to autozone and check

 
Rep Power: 812

yeah just have it checked. our alternators are tricky, cause there is a load detector that turns it off when power isnt needed. have someone turn the fan **** from off to full while you check battery voltage with the car running. or turn the a/c on. something that draws alot of power and will cause the eld to turn the alternator on full power.

 
Rep Power: 228

The voltage across the battery posts should be around 14V or a little higher. Clean and tighten the battery terminals and the ground wire connection. Have you checked whether the alternator belt is tight? Any electrical problems?

 
Rep Power: 0

Yeah its a new belt. i did a auto to manual swap so i bought all new belts.
No electrical problems as of now. Just my speed sensor isnt working. i dont know what wires to cut

 
Rep Power: 228

What year Civic? If it is 96-00, check whether 7.5A fuse 15 under the dash is blown.

If you have a 7th gen Civic, check 10A fuse 4 under the dash.

 
Rep Power: 0

Already checked it..
thats weird the alternator worked before we did the swap...you have any idea what the whinning noise is? its coming from the engine bay. not from the speakers

 
Rep Power: 228

Pinpoint the noise using an inexpensive engine stethoscope.

You'll generally get more specific information by mentioning the year/trim Civic.

 
Rep Power: 0

oh yeah sorry its a 02 civic ex

 
Rep Power: 0

Brought it to autozone they said it was bad