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Topic-icon '74 R90s Neutral Light Comes On When Clutch Lever Squeezed

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10 months 1 week ago #4007 by 14323
Thanks for your help. Not knowing about the "1004" , I ordered about a half dozen different values from Radio Shack.
BUT, while testing with my VOM the Original seems fine: one way was 273k ohms; the other direction was 0L ohms. ???

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10 months 1 week ago #4012 by murphyam53
If your VOM is telling you the truth, that diode is open i.e dead. OL ohms means overload, no current flow, open circuit, DEAD. 273K ohms is the equivalent of an open circuit in a 12 volt system.
The diode part number is actually 1N4001, 1amp, 50 volt. It is the most common diode in existence. 1N4002 is 100 volt, etc. Diodes are hard to measure if they are connected into a circuit. Disconnect the brown wires from one side of the diode to isolate it from the circuit. This diode's function is to prevent the clutch switch from lighting the neutral bulb. If the clutch switch does light the neutral bulb, the diode is shorted.

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10 months 1 week ago #4017 by 14323
Again, my thanks.
Being electronically challenged, (my so-called "friends" like to say "if you can run wire to it, Dave can set fire to it") I thought that if the diode gave two different readings, it was doing it's job. I checked my order list from Radio Shack and it included two # in 4001 1 Amp diodes. Beginners luck.
Once they arrive, I have a very small iron I can use to "just melt and get out".
Thanks again for your help.
Dave

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10 months 1 week ago #4020 by 14323
I just checked my shipping confirmation from Radio Shack: The diode order won't be here until Saturday :(
Oh, well. The transmission is still out being repaired so it would be difficult to find out if my "surgical efforts" are successful, but, again, thank you SO MUCH for your time and expertise! I REALLY appreciate it!
Dave

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10 months 1 week ago #4021 by Wobbly

14323 wrote: Again, my thanks. Being electronically challenged...


A common affliction, more prevalent than once believed.

You're simply working in the field known as "Electrickery". :lol:

Don't hide 'em, Ride 'em !!
#15150

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