I recently replaced my alternator, now theres a.

FREDMAC

MEMBER
2003 CHEVROLET SILVERADO
190,000 MILES

I recently replaced my alternator, now theres a roaring noise coming from where the brake booster is located and when I apply the brakes my truck goes dead. Any solution?

Saturday, December 15th, 2012 AT 6:38 PM

5 Replies

FREEMBA

MECHANIC
1,152 POSTS

Is this noise there all the while the engine is running? Even in park?
If so, remove the ABS fuse (60A) from the underhood fuse box to see if the noise stops. If so the ABS pump "motor" is running at all times.
Now with engine running (in park) try hitting the brakes to see if the engine dies. Post your results here for further assistance.

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Saturday, December 15th, 2012 AT 6:45 PM

ASEMASTER6371

MECHANIC
52,797 POSTS

Is the alternator working?

What is the voltage at the battery when running?

Roy

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Saturday, December 15th, 2012 AT 6:46 PM

FREDMAC

MEMBER
5 POSTS

The voltage at battery when running is at normal 14v, but when brakes are applied it drops to 6v then goes dead. I havent tried removing fuse yet, raining hard here in texas, but will try it asap. If it stops the roaring do I need to replace the ABS pump motor?

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Sunday, December 16th, 2012 AT 3:18 PM

FREDMAC