Battery light stayed on and engine RPM's were high

AUSTINO

MEMBER
2003 JAGUAR S-TYPE
3.0L
6 CYL
2WD
AUTOMATIC
67,000 MILES

Hello good afternoon,

I started the vehicle this morning and the battery light did not disappear and the car was racing. Then suddenly the rev count was not moving either and when I tried to put it into gear it slammed. Also when I touched the accelerator pedal it was not revving out either. As a result, I switched off the vehicle then I went to the fuse box in the trunk and I touched a few fuses and when I restarted the vehicle everything started to work as normal as before. I drove it about 7 miles to work and switched off the engine. Then when I was ready to leave work I switched on the engine and while I was driving home the battery light came on again. Thank you in advance!

3 Replies

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

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

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Wednesday, October 21st, 2020 AT 1:59 PM

AUSTINO

MEMBER
209 POSTS

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

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Wednesday, October 21st, 2020 AT 1:59 PM

JACOBANDNICKOLAS

MECHANIC
109,755 POSTS

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.

______________________

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

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