How to replace the alternator?

Tiny
JOSHTHEMECHANIC
  • MEMBER
  • 2004 MERCURY MARQUIS
  • 165,000 MILES
Looking for a step-by-step guide on how to replace the alternator in the car listed above.
Sunday, June 22nd, 2025 AT 11:06 PM

1 Reply

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 110,176 POSTS
Hi,

If you look below, I have attached the directions for replacing the alternator. Note that there are two different alternators that could have been used. One is a 130 amp, and the other is a 200 amp. You may want to remove it and take it with you when you get the new one. That way, the correct amperage can be obtained.

Also, here is a link that you may find helpful:

https://www.2carpros.com/articles/how-to-replace-an-alternator

Let me know if this helps or if you have other questions.

Take care,

Joe

See pics below. This is an easy one. Just make sure the negative battery terminal is disconnected before you start.
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Monday, June 23rd, 2025 AT 8:23 PM

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