have replaced battery and altenator on 99 mercury mystique still not charging?

Answer 1

There must be a 12 volt input to excite the field of the alternator.

There should be two wires connected to the alternator, a big wire going to your battery and the small wire that usually comes from the ignition switch and goes thru a fuse. Have you checked the charging system fuse?

Answer 2

OBD II Your {on board diagnostic computer} second generation is running a loop. The poor thing has no idea if you changed a tire or emptied the ash tray. It found a fault in it's primary system and gave you a red light from the dash. Unfortunately you have to dump the fault error code and hopefully the mechanic had president of mind to shut down the system before he changed out the components. Other wise you might have fried the... Well go seek an ASE mechanic. Good Luck Redd

Answer 3

Ceck the tertminals of the battery and clean or scrap off the external surface for any minor corrosion that may have taken place bec of the humidity in the atmosphere. Alternately check the distributor also (there is a small contact point made of high density carbon for charging). Good luck!

Answer 4

Check the connection on your alternator, its on the back. If everything is good to go then the only thing it could be is an open wire, look for other electrical signs such as lights dimming while running or dash lights flicker, if its an open wire good luck finding that.email [e-mail]

Answer 5

You may have to go to a garage with diagnostic testing equipment. Electrics are controlled by a computer module. The computers go bad after a while.

Answer 6

check the gauges fuse. that fuse excites the alt to start it charging. make sure u have 12v at it.... NAD USE A DVM, not a test light, 4v will light a test light but not b enough to excite alt

Answer 7

I don't know :-D