1999 Mitsubishi Eclipse alternator voltage

1999 MITSUBISHI ECLIPSE

85,000 MILES • 2.0L • 4 CYL • 2WD • AUTOMATIC

KRYPTECLIPSE

MEMBER
45 POSTS

What is the voltage that the alternator is supposed to put out? This is the second alternator I have installed. The mechanic says that it should charge at 14 and right now it is at 12.73. It goes down to 12.20 and back up Both Alternators were new. The battery is new and the starter is only 2 weeks old. The car is running.

Any help is appreciated
Thanks

Apr 22, 2015 at 12:55 PM

HMAC300

✓ASE Certified Mechanic
48,601 POSTS

check the items in the two pics

Images (Click to enlarge)

Professional Diagram for 2CarPros Members
Click here to log in and view diagram.

Apr 22, 2015 at 1:27 PM

KRYPTECLIPSE

MEMBER
45 POSTS

Fuses seem fine, I changed them just in case. Still putting out 12.73.
Any ideas
Thanks in advance

Apr 23, 2015 at 6:32 AM

HMAC300

✓ASE Certified Mechanic
48,601 POSTS

only thing I can think of is the belt may be slipping. if it has an automatic tensioner replace that as well. it should but out at least13.5 volts and up to 14.3 at a complete discharge. try pulling the generator relay and looking for corrosion on prongs if its removable. clean them off and tweak them a tad and put dielectric compound on it . you might see if there is corrosion on 100 amp fusible link as well

Apr 23, 2015 at 6:41 AM

KRYPTECLIPSE

MEMBER
45 POSTS

will do
thanks

Apr 23, 2015 at 7:11 AM

Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.