Charging system

JOHN 57

MEMBER
1995 CADILLAC SEVILLE
4.6L
V8
2WD
AUTOMATIC
80,000 MILES

Battery not charging. Checked voltage at battery and terminal on fuse panel, ten volts car running. Found alternator (three wire) no output. Need wiring schematic as later models show generator (five wire), so I am unsure alternator correct for this application. Can adapt if need be but prefer to return to factory correct, if indeed it is not.
Have number 8 wire from back terminal of alternator direct to battery and number 2 terminal only one being used. I really appreciate the help that all of you provide.

6 Replies

PATENTED_REPAIR_PRO

MECHANIC
1,853 POSTS

I assume you do not have the heated windshield, because it appears that is the difference.

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Thursday, January 25th, 2018 AT 6:53 AM

JOHN 57

MEMBER
6 POSTS

Correct, windshield not heated.

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Thursday, January 25th, 2018 AT 9:29 AM

PATENTED_REPAIR_PRO

MECHANIC
1,853 POSTS

This appears to be a one wire sort of hookup. Test the voltage again while revving the engine up right at the rear of the alternator on the connection for the larger gauge wire that feeds the battery positive post. If it is still not about 14 volts, chances are the alternator is not working. Remove it and take it into an auto-parts store like AutoZone or Advance Auto for a free bench test and replace it if it fails and check it again after you install it.

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Thursday, January 25th, 2018 AT 9:43 AM

JOHN 57

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6 POSTS

Then this model does not use temperature sensing even though instrument panel displays true temperature? Was assuming some one installed the wrong alternator and butchered wiring to adspt.

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Thursday, January 25th, 2018 AT 9:54 AM

JOHN 57