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Alternator replacement instructions?

Tiny
LG062146
  • MEMBER
  • 2002 LINCOLN LS
  • 160,000 MILES
How to remove the alternator on 2002 linclon ls? I have removed the three bolts, two at the bottom and the one at the top. I have removed the belt and now the alternator is stuck unable to remove completely. Help please
Tuesday, August 30th, 2011 AT 1:08 PM

18 Replies

Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Yep you will need to remove the radiator or undo the engine mounts to move the engine upward to gain room to remove the alternator.

Here is a guide to help you get the basics and diagrams (below) to help you see what you are in for when doing the job.

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

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Cheers
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Tuesday, August 30th, 2011 AT 2:58 PM
Tiny
ERICKASEARCH
  • MEMBER
  • 3 POSTS
  • 2002 LINCOLN LS
  • V8
  • AUTOMATIC
  • 167,000 MILES
I ended up with the car listed above after an accident. I'm having issues with the car being difficult to crank and stalling at slow speeds/idle. The problem seems intermittent and has been happening for a few days now.

Last week I had a check engine light come on after some rough idling with a P1565 and a P0402. That light was off again when the car was started again.

The voltage test came back with the battery car off at 12.77V, at crank 11.37V, No load 14.21V, Loaded 13.68V. The autozone that did the voltage test said it was the alternator, but I'm concerned that the computer might also be faulty. If it is, I don't want to dump hundreds of dollars into the alternator. I'd rather dump the vehicle all together at that point. I just have no idea how to differentiate.
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Sunday, February 21st, 2021 AT 7:14 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

The readings you gave me seem to be good. Why do they think it needs an alternator?

Remember, they are parts salesman, not technicians. Their job is to sell parts.

As far as checking the system. You would need a full scan tool that can turn the alternator on and off to determine if the PCM is the issue.

The 1565 is for the cruise control. Not related to the charging system.

The 402 is for EGR flow. In most cases, it is the DPFE sensor that is the failure.

Roy
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Sunday, February 21st, 2021 AT 7:14 PM (Merged)
Tiny
ERICKASEARCH
  • MEMBER
  • 3 POSTS
Thank you for your replies. The check engine light came on at a rough idle last week, throwing the codes I listed above. Then when I cranked the car again the check engine light was off. It came back on again over the weekend, again at a rough idle, but I didn't have time to pull the codes. It was off again when I cranked the car again. The check engine light is currently off.

The bottom of the strip AutoZone printed out for me with the test results states that it detects a charging system problem, and the tech immediately said the alternator was bad. My knowledge is very limited on that system, but the voltages seemed fine to me too. That's why I was considering the PCM because I'd thrown that code earlier in the week.

The full results of the charging system test reads as follows:

Results - Diode Open
No Load 14.21V, ---, ---A
Loded 13.68V, --, --A
Ripple 419mV
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Sunday, February 21st, 2021 AT 7:14 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
If it indicates an open diode, the alternator is bad. The ripple or AC volts is too high.

Replace the alternator.

Roy

REMOVAL
1. Disconnect the battery ground cable.
2. Remove the air intake tube.
3. Relieve the accessory drive belt tension and move the belt off the generator pulley.
4. Raise the vehicle.

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5. Remove the front lower splash shield.

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6. Remove the top nut and through bolt.

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7. Remove the bolts.

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8. Turn the generator slightly to access the generator positive cable nut and remove the nut.

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9. Lower the generator slightly and disconnect the electrical connector.
10. Remove the generator.
Rotate the generator to gain access for removal.
Remove the generator.
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Sunday, February 21st, 2021 AT 7:14 PM (Merged)
Tiny
ERICKASEARCH
  • MEMBER
  • 3 POSTS
Thank you for your help.
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Sunday, February 21st, 2021 AT 7:14 PM (Merged)
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
You are welcome.

Always glad to help.

Roy
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Sunday, February 21st, 2021 AT 7:14 PM (Merged)
Tiny
AUKELEB
  • MEMBER
  • 1 POST
  • 2001 LINCOLN LS
  • V8
  • FWD
  • AUTOMATIC
  • 93,000 MILES
Can you tell me where the alternator is located and how to install
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Sunday, February 21st, 2021 AT 7:14 PM (Merged)
Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Follow positive battery cable if you have trouble finding alternator.

Install the alternator harness connectors, then install the alternator. Tighten the bolts in sequence as follows:
A. Step 1: Tighten bolt No. 1 to 35 ft. Lbs. (48 Nm)
B. Step 2: Tighten bolt No. 2 to 15 ft. Lbs. (20 Nm) plus 90 degrees
C. Step 3: Tighten bolt No. 3 to 35 ft. Lbs. (48 Nm)

Install or connect the following:

Lower splash shield

Accessory drive belt

Air intake tube

Negative battery cable

Please note the following specifications:

A. Generator B+ wire nut to 71 inch lbs. (8 Nm).

B. Generator lower mounting nut and bolt. Tighten to 33 ft. Lbs. (45 Nm).

C. Generator upper mounting bolt. Tighten to 15 ft. Lbs. (21 Nm).

D. Left hand A/C suction line lower bracket bolt. Tighten to 89 inch lbs. (10 Nm).
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Sunday, February 21st, 2021 AT 7:14 PM (Merged)
Tiny
DEON1414
  • MEMBER
  • 5 POSTS
Its under the car on the passenger side remove small splash guard there are three bolts top goes all the way through bottom two thread in there is a plastic clip on a gray metal 3/4" line I believe a/c line remove that to make it easier, the tension pulley is in the middle closer to driver side you need to remove the air intake tube at the top to get to it, it helps if you have second set of hand for help. Make sure to remove the negative cable from the battey before you start. Its a very tight fit for the alternator to come out but it will, the motor will shift slightly side to side a three foot pry bar helps to shift the motor over to put the new one in hope that works for you had same problem just changed mine four days ago
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Sunday, February 21st, 2021 AT 7:14 PM (Merged)
Tiny
JOSHUAFENDER755
  • MEMBER
  • 34 POSTS
  • 2000 LINCOLN LS
  • 3.9L
  • V8
  • 2WD
  • AUTOMATIC
  • 152,000 MILES
Recently I had a check charging system problem, the light would come on but the car wouldnt suffer power problems unless you pushed down hard on the accelerator. To eliminate the problem I replaced the battery and the alternator. This completely fixed the problem for months, now the problem has returned but worse than before. Now the car will die after a slew of lights come one indicating the problem has drained the battery below acceptable levels. I am going to replace the alternator again today but I want to know what is causing the alternators to go out, if their is some kind of problem I am overlooking or if maybe I just bought a defective alternator from the auto part store.
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Sunday, February 21st, 2021 AT 7:14 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
Check fuse in pic then make sure terminal ends are clean on battery.
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Sunday, February 21st, 2021 AT 7:14 PM (Merged)
Tiny
JOSHUAFENDER755
  • MEMBER
  • 34 POSTS
I checked the fuse and it is fine. I replaced it anyway. Battery is new and so are the connectors. Any other ideas
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Sunday, February 21st, 2021 AT 7:14 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
It may be a defective alternator as well but check all your connections in chart I sent and other fuse inside car use a test light on it. Make sure your battery connection aregood and clean/tight and check battery ground to body&engine.
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Sunday, February 21st, 2021 AT 7:14 PM (Merged)
Tiny
LILJR1950
  • MEMBER
  • 3 POSTS
  • 2000 LINCOLN LS
  • V8
  • FWD
How to replace a Generater and lossen the serpentine belt to get it off?
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Sunday, February 21st, 2021 AT 7:15 PM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,896 POSTS
First, disconnect the battery. Next, there is an automatic belt tensioner that tightens the belt. Using the tool needed (wrench, ratchet.) Turn the adjuster in the direction to loosten the belt. Once it is loose, it will come off. Next, disconnect the wiring from the rear of the alt. Next, remove the bolts that mount the alt to the mounting brackets. Remove the alt.

Reverse the order to replace.
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Sunday, February 21st, 2021 AT 7:15 PM (Merged)
Tiny
RAULJR QUEZ
  • MEMBER
  • 1 POST
  • 2000 LINCOLN LS
  • 13,634,567 MILES
I replaced the alternator starter and ignition switch also brought brand new battery car was fine for a few turn one then it began dying to che b charging system what could I do
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Sunday, February 21st, 2021 AT 7:15 PM (Merged)
Tiny
HMAC300
  • MECHANIC
  • 48,601 POSTS
I assume you say it's not charging. Check fuses then put a volt meter on battery with car running see what volts are coming in check belt and tensioner, recommended replacement is 60,000 mi.
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Sunday, February 21st, 2021 AT 7:15 PM (Merged)

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