Battery drains and battery light comes on while driving

Tiny
DONNA EXUM
  • MEMBER
  • 2000 FORD RANGER
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 175,000 MILES
When driving the battery drains and battery light comes on. Had alternator checked and that was not problem.
Thursday, January 12th, 2017 AT 4:40 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,916 POSTS
Something was overlooked because if the generator is working, the "Battery" light would not be on.

Use a digital voltmeter to measure the battery's voltage while the engine is running. It must be between 13.75 and 14.75 volts. If it is low, we will need to measure the voltages on the smaller wires in the plug at the rear of the generator.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
+1
Thursday, January 12th, 2017 AT 4:47 PM

Please login or register to post a reply.

Related Battery Drain Content

How to Test for a Battery Drain-Draw
VIDEO
How to Test for a Battery Drain-Draw
Instructional repair video
Battery Parasitic Drain Repair
GUIDE
Battery Parasitic Drain Repair
A car battery should hold its charge for a few months before needing to be recharged, if not the battery has gone bad or the car has a parasitic draw, something is staying ...
VIEW MORE

Sponsored links