Battery light stayed on and engine RPM's were high

Hi,

It sounds like the alternator may be going bad. If it wasn't charging, you need to keep in mind, low voltage will cause a lot of issues on these vehicles such as idle and other electrically controlled components.

Do this: If the engine light is on, we need to check if the alternator is charging. Here is a link that explains how to check one. All you need is a voltmeter or a multimeter.

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Do this when the battery light is on and let me know the results.

Joe

Good afternoon, thank you. I will let you know the results.

Hi,

If you find the alternator here is a link that explains in general how one is replaced:

https://www.2carpros.com/articles/how-to-replace-an-alternator

Here are the directions specific to your vehicle. The attached pics correlate with the directions. Note: Make sure to disconnect the battery before working on the alternator.

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2003 Jaguar S-Type (X200) V6-3.0L
Generator - 3.0L
Vehicle Starting and Charging Charging System Alternator Service and Repair Procedures Generator - 3.0L
GENERATOR - 3.0L
Generator - 2.5L/3.0L (86.10.02)

Removal
1. Disconnect the battery ground cable.
2. Remove the air deflector
3. Detach the accessory drive belt.
- Rotate the accessory drive belt tensioner counter-clockwise.
- Use a 3/8 inch square drive bar to rotate the accessory drive belt tensioner.
- Detach the accessory drive belt.



pic 1


4. Detach the generator battery positive cable protective cover.



pic 2



5. Remove the battery positive cable retaining nut.



pic 3



6. Disconnect the generator electrical connector.



pic 4



7. Remove the generator.



pic 5



Installation
1. To install, reverse the removal procedure.
- Tighten to 48 Nm.



pic 6



2. Tighten to 12 Nm.



pic 7

______________________

Let me know if this helps or if you have other questions.

Take care,
Joe