Alternator wiring?

Tiny
CORTLAN BASIL HICKS
  • MEMBER
  • 1999 MERCURY MARQUIS
  • 170,000 MILES
On the 3-pin connector is there supposed to be two wires or 3 I only have two am I missing a wire or is it correct?
Sunday, April 13th, 2025 AT 2:37 PM

1 Reply

Tiny
STEVE W.
  • MECHANIC
  • 15,232 POSTS
There should be one heavy wire on a stud that goes to the battery, then a connector with two wires a light green with red that goes to the charge light on the dash and a yellow with white that goes to the battery junction box and acts as the sense wire to tell the alternator to charge.
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Sunday, April 13th, 2025 AT 2:45 PM

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