Need guidance. I fried my alternator after driving through large rainwater pond in the middle of the road. I got a new alternator, but this pesky battery symbol keeps showing red. Multimeter and voltagemeter in dashboard tells that charging voltage is in acceptable level. What could cause this? Help.

 

There is a fuse X that is tied into other things that may have blown

Fuse # 10 right engine bay fuse box

This fuse provides power to make power

There is a noise suppressor on most models that you can disconnect for testing purposes

The charging voltage should be at least 13.5 volts

 

Ok, thanks. I'll check fuse #10 and see if solution lies there.

 

One thing we have seen over and over is that replacement alternators cause problems. It has been recommended that to avoid all these weird problems is to rebuild your old factory original alternator. Jaguars for some reason are real picky on the electrical side!!
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IN435 is the voltage regulator that the aternator fault light comes from

Brick and mortar vendor and not E - bay

# IN435 Voltage Regulator for Denso Alternators, 12 Volt,On: Asuna (1993-1993) , Geo (1990-1993) , Isuzu (1990-1993) , Jaguar (1993-1997) , Jaguar - Europe (1994-1997) (alternatorparts.com)

Bearings , brushes and such on their site

 

i forgot how the charge light works on these

x308 and later you just hook the sense wire to the dummy light wire problem solved. no more battery light when you put a chinese regulator in

 

The question becomes if the instrument cluster determines the acceptable alternator output voltage to not give you the light

Seems from memory that a loose alternator B + cable tie in at the starter solenoid terminal post causes the alternator light to come on

And then where exactly is the instrument voltage gauge reading / sensing from

So there are a couple of things not squared in my head

 

Charging output 14.4v and fuse #10 solid. I’ll focus on other causes then.

 

pic coming of terminal post on top of your starter ( attached solenoid )

Not water related but easy check

I'll be away for a couple of hours

 

I'll get into that as soon as it stops raining.

 

I may have gotten the markings on the pic someone posted with me putting on the arrows

The starter being on the rear car's left so you're looking through the intake manifold pipes

The nut is a 13 mm on a 3 inch extension from under the car

 

Double checking the fuse location the # 1 is closest to the large terminal post on the fuse box so you have 1 - 9 row closest to the post

The next row would start with # 10 and is a small 5 amp fuse I think tan or yellowish in color

 

It's going to be this. Seen this too many times when replacement alternator had warning light issues despite working perfectly fine. What the current replacement alternator puts out in voltage and current is basically outside of what Jag light logic allows, hence your light is now on.

 

And there is no other way to go around the issue? Replacing the new regulator with the old one (if not blown) cannot be done? I'd rather yank the warning light bulb off. Enough info is gain off the voltagemeter anyhow.

 

do you have ground or battery voltage at the dummy light wire? one of the two options will shut the light off guaranteed.