Alternator problem

2001 MERCURY SABLE
130,000 MILES
Avatar
DARLEEN GRAY
  • MEMBER
  • 1 POST
On June first, I put an alternator into my car. It is a DOHC. On June 25, I had to put another alternator in. Then on the twenty seventh I again needed to be boosted. The alternators do not put out more than 12.5 to 13 volts when placed on the diagnostic machine. Nothing else shows up as faulty.

What can be causing this problem?
Jun 28, 2018 at 1:41 AM
Advertisement
Avatar
DANNY L
  • ✓Experienced Mechanic
  • 5,648 POSTS
Hello I am Danny.

That does not sound good! A few questions. Are you having a re-manufactured or new alternator installed? Have you also had the battery load tested? The specifications for your vehicle are as follows. Having an alternator load tested on vehicle should produce 58amps at 2000rpm. Have a no load test(all accessories off) should produce 13-15 volts. Your comment states only getting 12.5-13 is way too low. Is the correct alternator being installed?
Jun 28, 2018 at 12:25 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle