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Page 218 of Haynes manual rectifier test

Discussion in 'XJ Technical Chat' started by Nic, Dec 1, 2016.

  1. Nic

    Nic Member

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    Am I reading this wrong it's says red wire from tester goes to the red wire on rectifier black wire goes to white wire, I get nothing from this when I switched black to red and red to white I get a reading.
     
  2. XJ550H

    XJ550H Well-Known Member Premium Member

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    red probe to anode (red orphan annie, she has red hair)
    black probe to cathode (black cat)
    [​IMG] for diode D1 you test from white wire A to red wire D you should get a reading from one direction and when you reverse the probes you should get no reading

    one test is with voltage on voltage setting fig 6.2 the other test is with meter on diode setting fig 6.3

    with meter set to diode test, red probe on white, black probe on red you should get a reading of aprox .556 with probes reversed you should get no reading.
    with red probe on black and black probe on white you should get a reading of aprox .556
    with red on white and black probe on black wire you should get no reading.
    I just tested a v regulator as I wrote this

    move probe from white to white to test
     
    Last edited: Dec 1, 2016
  3. XJ550H

    XJ550H Well-Known Member Premium Member

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    you are testing correctly and there are two wires you test from to the white wires red wire (D1,D2,D3,) and black wire D4,D5,D6,) to white

    if you test from green to white or brown to white you get 1.48 reading because you are testing 2 diodes or no reading when you reverse probes

    I can not explain the reading you get when you test green wire with red probe to brown wire with black probe .556 and greenwire with black probe to black wire with red probe .851
     
  4. Nic

    Nic Member

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    I will run more test soon as I park this dump truck
     
  5. Nic

    Nic Member

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    Testing from D1 through D6 I'm getting around 500 green wire with red probe brown wire with black probe 528 from green to white or brown to white nothing
     
  6. XJ550H

    XJ550H Well-Known Member Premium Member

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    when testing d1 through d6 you test to black wire (D4,D5,D6,) and red wire (D1,D2,D3,) to the white wires as stated in manual

    I will test my other VRs from green to white and brown to white and let you know what I get

    are you just testing to test or do you have a charging problem?

    the test of the wires not listed in manual to test.
    VR 1
    Green wire to Brown wire
    Red probe .583
    Black probe .873
    Green wire to White wire
    Red probe
    1.515
    1.525
    1.524
    Black probe
    No readings
    Brown wire to White wire
    Red Probe
    1.108
    1.151
    1.118
    Black probe to White wire
    No readings

    VR 2
    Green wire to Brown wire
    Red probe .585
    Black probe 1.032
    Green wire to White wire
    Red probe
    1.613
    1.633
    1.631
    Black probe
    No readings
    Brown wire to White wire
    Red Probe
    1.232
    1.232
    1.239
    Black probe
    No readings

    VR 3
    Green wire to Brown wire
    Red probe .583
    Black probe .846
    Green wire to White wire
    Red probe
    1.551
    1.553
    1.539
    Black probe
    No readings
    Brown wire to White wire
    Red Probe
    1.150
    1.152
    1.138
    Black probe
    No readings

    I do not know if the wire tests mean anything as the manual does not ask to test them.
     
    Last edited: Dec 2, 2016
  7. Nic

    Nic Member

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    Yes I have a charging problem and my stator connection is melted
     
  8. XJ550H

    XJ550H Well-Known Member Premium Member

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    have you ohmed out the alternator and checked the brushes?

    read this thread first paragraph and then go to the bottom for your charging system
    The Ultimate Relay, Switch, Sensor, and Diodes Guide
     
    Last edited: Dec 2, 2016

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