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Hello, my name is***** will assist you.
Do you have a multimeter to do some testing?
No worries. This is whatI need you to test. With the key off, test the voltage that is at the starter solenoid. Then with water to the engine start it, measure the voltage again, it should have gone up slightly. Raise the RPM to 2000, then test the voltage again, if it is not going up to at least 14V DC, test the voltage that is coming from the stator, it is in AC, if it is producing about 16V AC, it is good, the voltage regulator has failed, replace that and the alarm will stop beeping.
Its actually part of the alternator on this engine. You would have to replace the Alt. Getting 15V is setting off an over voltage code.
Either one will set off the code and cause the system to go into guardian.
Also make sure that there is voltage going to the post of the Alt with the key off. There is a 100A fuse between the Alt and the starter solenoid.
That is correct. it has an Alt just like your truck. For some reason, I was thinking two stroke.
For the running test yes. Make sure that you have the 12V on the post of the Alt also before starting the engine. If may be a blown 100A fuse harness.
Let me know how it turns out.
Yes, the running test is still the same. You will just need to test it at the Alt and also at the starter solenoid.
Your very welcome. I feel that all of this should have already been checked by the guy that scanned the engine. I would have.
Your very welcome.