Just some background info:
If a 30Amp fuse is blowing, you have some serious short. These fuses are designed to handle up 1.5 times the current before they blow. This means in your case up to 45A.
Depending on your alternator (Nippon Denso or Delco Remy) ( related to the XJ model) you have an external regulator.
In the past update model this regulator is located- guess where? - in the ECU.
For this reason it is important to let the forum members know what XJ model you drive. Otherwise every fault diagnosis is just guessing...
If your regulator is shot. The cheapest exchange (You really don't want to buy an new ECU!) is to put an regulator directly behind your alternator.
But we don't know the model, so it is guessing again.
All the petrol xj's here use the ecu as the regulator irrespective if it is an update or a pre-update. .......
1996 update. Has obd2. Replaced aultenator. Fitted a lager one from a zj grand. All fixed. I'm only putting what I had happen up because when I googled the fault they all said O2 sensors. Tho this was not my fault.
1996 update. Has obd2. Replaced aultenator. Fitted a lager one from a zj grand. All fixed. I'm only putting what I had happen up because when I googled the fault they all said O2 sensors. Tho this was not my fault.
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1996 JEEP CHEROKEE
