Question about Jaguar XJ8
It is probably your alternator and may be showing voltage but not enough amperage. Have it tested while the light is on and a good alternator will put out 1/3 of total rating. So if you have 120AMP alternator it should show 30-40AMP load with all lights on and blower motor on and engine at 2,000 RPM's. Make sure if it is an alternator issue you have the new one tested before installing.
It may be that you have some corrosion on the plug for the alternator. One of the leads affects the current going to the field, which then affects the output voltage of the alternator. You get a high resistance connection in this lead, it can cause the alternator to act funny. You can try spraying the plug to the alternator with some contact cleaner and see if that helps.
Does the battery light come on at specific times? ie, high RPM, whenever the dash fan is turned on high with the car at idle, etc... A common failure mode for this sort of problem is if you are getting the light with high RPMs (over 3,000), then odds are your alternator is on its way out. If you are getting the light when you turn on the dash fan (large electrical load), then odds are you either have a bad alternator or the wire feeding the field of the alternator is having issues.
Keep us updated.
Posted on Mar 15, 2011
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Oct 12, 2016 | GMC Cars & Trucks
Aug 26, 2016 | 2003 Nissan Xterra
Oct 29, 2013 | 1996 Buick Century
Jan 27, 2013 | 2000 Jaguar S-Type
Sep 10, 2011 | 1998 Jaguar XJ8L
Feb 22, 2011 | 2000 Jaguar S-Type
Jan 05, 2011 | 2003 Chevrolet Malibu
Jun 18, 2010 | 2000 Jaguar S-Type
Dec 13, 2009 | 2000 Jaguar S-Type
Aug 03, 2009 | 2000 Saturn L-Series
Oct 14, 2017 | Jaguar X-Type Cars & Trucks
Oct 11, 2017 | Jaguar S-Type Cars & Trucks
85 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: