1990 Yamaha XJ 600 Logo

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Posted on Jun 19, 2011
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1992 xj600- i replaced a faulty sparkplug cap and started bike. bike went dead, no lights etc. tested batt - ok 12 volts from main fuse to ignition switch .12 volts from ignition switch to connector, once connected to return wire to fuse box -reading at fuse box 0.4 and same at other fuses. is there another component / fuse, on this circut that could draw the voltage and cause this. Could a faulty component ie rectifier, relay switch etc cause this.

  • steenscorner Jun 19, 2011

    I have removed connecter to rectifier and taken the following readings

    with ignition on---0.08 volts`

    with ignition off---12+ volts

  • steenscorner Jun 22, 2011

    thanks but i have already stated that I have no voltage after ignition switch so cant start bike fried of mine said to test starter relay or starter cut off relay, will try that

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1 Answer

raj somaiya

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  • Master 5,370 Answers
  • Posted on Jun 19, 2011
raj somaiya
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The faulty regulator can cause this problem.Get the voltage at regulator checked.If its weak or shorting it can cause such problems. -------------- Also try this thing.Remove the main fuse for 5 minutes then reinsert it.The main fuse located near the battery compartment.Remove this main fuse, wait 5 minutes then re-0insert it then check.Many a times this reset the problem.But if that is not helping then get the regulator( alternator) checked.Also check the battery connections and ground.Anywhere its shorting or getting loose.--------This will help.Thanks.Helpmech.

  • raj somaiya Jun 19, 2011

    Its faulty regulator/rectifier .With the ignition on you should have 14.2-14.5 volts.
    ----------------
    If you don't have a meter you can try the following (less effective) test: remove the positive terminal from of the battery with the engine running. If the engine continues to run, the regulator/rectifier is okay. If the engine dies, there is a problem in the electrical charging system.
    -----------------------
    The function of a voltage regulator is to maintain a precise voltage regardless of the current drawn by the load. With meter switched to DC volts and probes on positive and negative terminals of the battery, read the voltage as before (again, should be a bit more than 12 volts). Then start the engine but don't rev it up. Slowly increase the engine speed to maybe 2000 rpm. The voltage should climb up to 14.2-14.5 volts and remain level there. If so, the voltage regulator is good.-----------
    Its shorted and faulty regulator/ rectifier, it has to be replaced.---------- This will help.Thanks.Helpmech.

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Related Questions:

3helpful
1answer

Batt. not ataying charged

Check output of battery when bike is idling.
If still 11 volt, then your charger, which is the magneto is faulty or the wire is broken from it to your battery. If the charge varies when you test when engine dead to engine idling, wire is fine. Should be 13 to 13.5 volt when idling if magneto is ok.

J
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