2002 FORD FOCUS CHARGING PROBLEMS

  • Tiny
  • skipp930
  • 2002 Ford Focus
  • 2.0L
  • 6 CYL
  • 2WD
  • automatic
  • 100,000 miles

Changed battery, alternator, charges when first started, 10 mintues later, not charging, battery light on? Not on constantly, on and off, when giving gas goes off, idling up and down?

Do you
have the same problem?
Yes
No
Wednesday, June 11th, 2014 AT 6:56 PM

5 Replies

  • Tiny
  • Ty Anderson
  • Expert
  • 706 posts

The charging system is controlled by the vehicle's computer. Lets assume the battery & alternator is good because you replaced them. Next, is the wiring to the alternator. Disconnect the electrical wiring connector at the alternator and make sure both wires (not the large red cable) are not broken. Either wire is brake were the wires run into the main wiring harness. Give each wire a tug away from the main harness and make sure were the two wires go into the connector are not broken.
Thanks for the question

Was this
answer
helpful?
Yes
No
Thursday, June 12th, 2014 AT 10:20 AM
  • Tiny
  • skipp930
  • Member

Thankyou very much, I got the old alternator tested today, and it was good? So now I'm really getting worried.

Was this
answer
helpful?
Yes
No
Thursday, June 12th, 2014 AT 2:06 PM
  • Tiny
  • Ty Anderson
  • Expert
  • 706 posts

Really inspect those wire well. Open the plastic covering they're in to make sure and when done reinstall the plastic cover and tape up with electrical tape.
This is what I usually see is that the charging system is still function (without the computer or the signal wire to tell the battery light to come on) just the broken wire or the vehicle's computer but that is unlikely not impossible

Was this
answer
helpful?
Yes
No
Thursday, June 12th, 2014 AT 2:13 PM
  • Tiny
  • skipp930
  • Member

Well we checked the car this morning at work, and now it wont charge at all.( My car is broke down at my work) Guess I'll end up having to put it in a shop after all. Had a mechanic at work change the alternator, then it was still messing up, they are all old school mechanics, don't know much about computers on cars. We do have a ford computer we can plug in on my car at work, he said that it didn't have a code? If it makes a light come on shouldn't there be a code to tell me whats wrong? I'm really upset with this car. Thankyou people for your help. At least someone is trying to help me.

Was this
answer
helpful?
Yes
No
Friday, June 13th, 2014 AT 4:42 PM
  • Tiny
  • Ty Anderson
  • Expert
  • 706 posts

The large red wire attached to the alternator has a fuse like device within the wire called a fuseable link meaning this link will melt & open the circuit to prevent current flow out of the alternator.
Do you have experience with a voltmeter?

Was this
answer
helpful?
Yes
No
Tuesday, June 24th, 2014 AT 11:10 PM

Please login or register to post a reply.

Similar Questions