Walshy569

Hey guys I have a 2005 f150 that I replaced the alternator about 2.5 months ago. Ever since I have had electrical issues and now a really loud noise,pulsing dash lights and eventually all gauges shut off and reset. I noticed when the noise happens the voltage meter is spiked up to 3/4 and when it resets the dash and radio it goes to max. I also can't get past 1/4 throttle with out this happening. I don't know what it is. The battery is brand new just got it yesterday still having major issues. Any help is appreciated thanks guys.

Walshy569

Here's a link to the video if you want to see what happens

gone postal

Bad alternator. Just because ti's new doesn't mean it's good.Spiking gauge means the regulator internal to the alternator is shot.

Walshy569

Okay and that's what is making the grinding noise too?

scobar

iTrader: (4)

Can you get more info on where the grinding is coming from? Was this an OEM alternator you put in or something aftermarket? I had an issue once with a high output alternator from some place online that specializes in high output alternators. With this alternator, I could be driving down the road and my stereo would cut out for a second and at the same time you'd hear this weird sound coming from under the hood.

I replaced that alternator with a mechman, and the issues went away. I returned the other one, they INSISTED nothing was wrong with it and nailed me a restocking fee.

Walshy569

The noise seems to be coming from the center/passenger side area when the windows are closed. And no it is a remanufactured motorcraft one from a shop by me that rebuilds them. The noise has gotten so bad that it stays on for minutes at a time and the voltage gauge spikes completely.

Mod (Ret.)

Take the truck to the place where you got the remanufactured Motorcraft alternator, and let them see firsthand how it is acting. My guess is that they will want it back and issue you another one.

Walshy569

Yep that's exactly what they did today. Gave me another one no problem. Hopefully it works when I install it tonight.

scobar

iTrader: (4)

Sounds a lot like what I was experiencing, but your example is more extreme.

Shane Buresh