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1989 Jaguar XJS Charging system

Tiny
JOESJAG
  • MEMBER
  • 1989 JAGUAR XJS
  • V12
  • 2WD
  • AUTOMATIC
  • 65,000 MILES
I have removed my alternator and the bench tests okay. Reinstalled, the dash gauge still reads discharge while running. Even at high rpm. The idiot light lamp is working and does not go out. I've checked the wiring and it looks good, as do the fuses. Where do I look to solve the problem? I am stumped. A tracible wiring diagram would be very helpful.
I have not used a site such as this for help before. I promise to make a donation if the information you provide helps me find and repair the problem.
Thank you,
Joe
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Sunday, January 20th, 2008 AT 10:26 AM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
If you have a voltmeter test the battery open voltage-meaning no load on the battery.
it should read 12.4 or higher. If not you need to recharge the battery to get up to read atleast 12.4 volts. If you got it-Start the car turn the lights On, and read the battery again it should be reading 13.5-15.5 volts if not the alternator is not putting out.

See your EWD below


https://www.2carpros.com/forum/automotive_pictures/12900_charge2_1.jpg



https://www.2carpros.com/forum/automotive_pictures/12900_charge1_1.jpg



https://www.2carpros.com/forum/automotive_pictures/12900_111_1.jpg

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Sunday, January 20th, 2008 AT 11:02 AM
Tiny
SOMEYOUNGMAN
  • MEMBER
  • 1 POST
Did you find the problem? I am experiencing the same symptom.
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Wednesday, June 26th, 2013 AT 7:20 AM

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