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· Registered
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Discussion Starter · #1 ·
Hey all,

My daughters 99 has the battery light on. While car is running 12.6 volts at battery terminals and alternator terminals. If I full field the alternator (ground the voltage regulator) I get 15+ volts at battery. I'm thinking the alternator is good and the voltage regulator is the culprit. I have already checked all connections. 54.00 for a motorcraft regulator. Any one had success with just replacing the voltage regulator?
 

· Super Moderator
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10,547 Posts
It sure could be the regulator. With the engine running at an idle, you should get over 13 volts, like 13.7-14.1. Unless the battery was already somewhat discharged. In that case it would rise after a few minutes of idling - but be above 12.6. Thats what a good battery should be after its been sitting for a while (with engine shut off no power being drawn). Like an hour after the engine was shut off.
 

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87 Posts
The alternator and voltage regulator are one part for the Escort. The same labor is needed to remove both. The alternator cost ~$80. Eventually you will need to replace the alternator to. Your time is worth the extra cash. Plus the knowledge that it will be more reliable.
 

· Former Escort Owner
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Actually, the regulator can be purchased separately, but for a little more, might as well replace the whole alternator.

Casey
 

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Discussion Starter · #5 ·
I ended up replacing the regulator only for 54 bucks with new brushes. Its working fine. I DO NOT trust the rebuilt alternators from most places. Been there done that. I prefer to keep the original Motorcraft parts whenever possible. There isn't too much inside of these alternators to go bad. Bad diode, rectifiers etc... Just my opinion. Thanks for the replies.
 
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