arrow wiring

bob.keevil
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arrow wiring

Postby bob.keevil » Wed May 01, 2019 7:43 am

Hi All
Getting above myself and trying to fit a harness to project Tightwad Rusty I connected a solid state rectfier to the three leads from the alternator and as I connected the battery the rectfier rapidly got hot. Is the alterator shot or should I look elsewhere for the problem,the ampmeter showed a heavy discharge. Please reply in simple speak .It is a new harness from Drags

Thanks in advance
.


Cheers Bob K.

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Bob.Murphy
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Re: arrow wiring

Postby Bob.Murphy » Wed May 01, 2019 9:52 am

Is the bike Positive or Negative Earth . . .

And does the Electronic Regulator match the bike's polarity ??

Simple questions first ;) .

Bob.
My avatar shows the late Len Rich in 1970 with the bike I now have - a 1958 Ariel VH

bob.keevil
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Re: arrow wiring

Postby bob.keevil » Wed May 01, 2019 4:31 pm

Hi Bob
The arrow does not run a regulator just a rectifier and can get the battery a bit over charged on a long run with no lights on.


Cheers Bob K

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Re: arrow wiring

Postby bh.sprint » Wed May 01, 2019 9:30 pm

Hello Bob,

Just to eliminate one area -- are the alternator wires connected correctly to the rectifier , some alternators have had the wires changed over the years and the wrong colours used. It is possible to check the resistances of the alternator coils to find if any are not working or shorting , Dennis Hern did an article in the Cheval a few years ago with values of the resistances for green/white wire to green/black wire etc.

Brian H.

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Re: arrow wiring

Postby keith.mettam » Thu May 02, 2019 9:25 am

Hi Bob, Have you tested the rectifier ?
Regards, Keith.

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Bob.Murphy
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Re: arrow wiring

Postby Bob.Murphy » Thu May 02, 2019 11:21 am

My mistake, it was the 'Solid State' comment that threw me :oops: .

Is the rectifier one of the old 'Selenium Plate' type (that I recall on my 1959 AJS 350) or a more modern Silicon Diode job??

These may give some clues about its state if you suspect its faulty:

https://en.wikipedia.org/wiki/Selenium_rectifier

https://www.syscompdesign.com/2016/10/25/testing-a-selenium-rectifier/

I'll see if I can find an Arrow Wiring Diagram and have a ponder.

Bob.
My avatar shows the late Len Rich in 1970 with the bike I now have - a 1958 Ariel VH

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Bob.Murphy
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Re: arrow wiring

Postby Bob.Murphy » Thu May 02, 2019 10:46 pm

This was posted here by Roy Brown last November. It is for a Negative Earth bike with a solid state Rectifier/Regulator that has been converted to 12 volts (two of the Alternator outputs are ganged together).

Is this how you have wired your Arrow (ignoring the conversions if appropriate) ??


Ariel Arrow Wiring Diagram.jpeg.jpg


The output side of the Rectifier goes straight to the battery and the design of the Rectifier shouldn't allow a back-current (apart from a minute drain) under normal conditions.

From memory, the Earth connection is actually via the mounting bolt.

I can't see where you would get a massive drain from the battery if the Rectifier is wired correctly. If it was faulty I suspect you could get a current drain. The fact that the Rectifier was getting hot suggests that you might have the battery wired to one of the Alternator input connections and the earth wired to the Rectifier output. Does the wire colouring match the diagram ??

Curious now :? .

Bob.
My avatar shows the late Len Rich in 1970 with the bike I now have - a 1958 Ariel VH

bob.keevil
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Re: arrow wiring

Postby bob.keevil » Thu May 02, 2019 11:08 pm

Hi Bob
Thanks for all the info. I knew I was going in over my pay grade so I will take a step back and try to absorb all your helpful advice. Thanks again
cheers. Bob K

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Re: arrow wiring

Postby Bob.Murphy » Fri May 03, 2019 9:57 am

Let us know how you get on.

This won't be a million miles from the two Triumph Tiger Cubs I'm restoring . . . Hence my interest ;) .

Bob.
My avatar shows the late Len Rich in 1970 with the bike I now have - a 1958 Ariel VH


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