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Hi there my name is XXXXX XXXXX I'd like to try and help. When you say that you have a new alternator fitted on the vehicle, was this alternator looked up properly at the parts store. Are you sure this is the proper alternator for this vehicle? I looked up the charging system wiring diagram for your trooper. It shows that the ECM is inside the vehicle behind the dash in the center area. This is the only part of the charging system that is inside the vehicle. If you look on the wiring diagram that I'm sending you, you will see that the ECM(PCM) has a gain control wire that goes to the alternator. I would follow this wiring diagram and check the back of your alternator to see if you have the same amount of wires hooked up to your alternator and if they are looked up on the proper terminals. Let me know what you find. Thanks.
Alternator was supplied by Milner Off Road and I think that is the right one for my vehicle. It was fitted by a proper mechanic and there are no spare wires, there's only 2 wires that go to it. I can't find the wiring diagram, can you send that again? May be to my email address: XXXXX@XXXXXX.XXX.
Sorry, forgot to send it!
Here you go ! Hope this helps!
Hey there ! Just checking in to see how it's going ! Let me know if I can help you further!
Would that affect the running of the engine, it overruns slightly when you switch off?