Charging

Tiny
JACOBOSNESS
  • MEMBER
  • LINCOLN TOWN CAR
I have a 1989 lincoln town car with 120087 miles, 5.0L. I have replaced the battery with a new one, put on new pos and neg battery cables. I have taken out the alternator and had it bench tested at the local auto parts store, (it tested good). But when I drive the car it does not seem to charge. I have also brought it in to the ford dealership to have them look at it and they could not find any thing wrong. But then when I picked it up it wouldn't start, ( dead battery again). What could be causing this? Is there a fuse or something for the alternator?
Sunday, September 9th, 2007 AT 1:07 AM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If you full field the regulator meaning bypassing it and the voltage increases-the regulator is defective if not the alternator.

Recommend you have the stator and ignition circuit coming off the alternator to the ignition be check.
Was this
answer
helpful?
Yes
No
-1
Sunday, September 9th, 2007 AT 1:36 AM
Tiny
TOBYU
  • MEMBER
  • 89 POSTS
A bad voltage regulator will keep a good alternator from charging.
It is on the passenger fender well IIRC. And you can get a cheap one for 12.00. I would recommend the cheap one for test purposes and if it fixes your problem. Go get a motorcraft one at the dealer and put the cheapie in the glove box for a back up, as the motorcraft ones are very good regulators. The aftermarket ones are very cheaply bulit and are regularly poorly adjusted for voltage output and don't last long.
I think FoMoCo ones are around 49.00
Was this
answer
helpful?
Yes
No
Friday, November 16th, 2007 AT 1:46 AM

Please login or register to post a reply.

Sponsored links