There is problem in my new alternator its same the old one with 3 wires but it is not work

SOURCE: Charging system

change your battery cables and check all wires on the alternator for loose connections, expecially the grounds.

Rod Wallberg

• 494 Answers
• Posted on Feb 14, 2010

SOURCE: 2006 Ford Tarus Over Charging from Alternator

Could be a pinched wire that did not show up when new. May have worked thin over the years.... Though to locate at times..... Bulk head headers can be a culprit, any where a wire passes through or over metal parts. Check for corrosion near battery terminals and alternator as a corroded connector can be "seen" as a resistance to the alternator and it will output more amps to compensate.....

SOURCE: 2006 ford f 250 alternator light comes on when hot

check for tightness/worn out belt,or oil on pulley.

Jeffrey Turcotte

• 8991 Answers
• Posted on Oct 29, 2010

SOURCE: Have a 2006 Ford F350

1 & 3 should be all you need. The middle one may be an extra ground or signal for PCM in another model. Colors on the harness are light green/red for pin 1 and orange/light blue for pin 3. OK?

SOURCE: got a 1990 ford taurus

Unfortunately if it was a rebuilt alternator it may have one bad diode causing it to bleed amps and drain the battery. With rebuilds this happens a lot these days. Either have the diodes tested or demand a different alternator under warranty.