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  1. H

    P38A P38 diesel 2001, overcharging / alternator recommendation

    Jumper from alternator positive is in place in parallel with the original wiring. I presume there will always be pulses, although low ones. I'll check what range we used on the oscilloscope. Thought I would see irregular pulses if a diode was broken. I'll check the diodes with a multimeter. I...
  2. H

    P38A P38 diesel 2001, overcharging / alternator recommendation

    Earth strap OK. I've tested with a jump lead but no improvement. Also attached an oscilloscope and only stable continuous pulses detected. I'll do some more testing over the weekend, to be continued.
  3. H

    P38A P38 diesel 2001, overcharging / alternator recommendation

    Yes, I've been using different types of quality meters like Fluke etc.
  4. H

    P38A P38 diesel 2001, overcharging / alternator recommendation

    Half a year ago I fitted a DELCO REMY DRA3673 alternator due to charge voltage variations (from too low to 16V). The new alternator worked well for half a year but then started to charge with up to 18V, also at low rpm. The cabling between the alternator and battery is upgraded. The voltage...
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