Voltage Drop when turning headlights on

[cris98GT]

When i start the car it will idle ok but then when i pull the headlight knob it will drop the voltage. Any ideas?

 

[Noobz347]

When i start the car it will idle ok but then when i pull the headlight knob it will drop the voltage. Any ideas?

You could go through and clean all of your contacts and grounds.

Once complete, get a meter onto the alternator and check for a pretty consistent 14+ volts while charging.

I drive a Fox so, voltage drops are pretty common. heh You will likely find another when you switch the A/C on and off too


Also: How old is your battery?

 

[cris98GT]

Just replaced it actually. and Also the alternator, i believe it’s a motorcraft alt. But voltage will drop causing the rpm’s to go down anx then the computer will tru and regain itself by raising rpms again causing it to have a fluctuating idle

 

[Shuttleman83]

Bad Battery or Connector not tight enough, possibly ground strap.