Author Topic: C12 Wiring Harness  (Read 649 times)

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Offline kimver

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C12 Wiring Harness
« on: September 12, 2016, 06:16:43 PM »
Hello. I am a new bsa owner and new in this forum. Recently I bought a 1958 C12 with very bad wiring, therefore I decided to replace with new wiring. Is there a form that describes length, connectors, cross section and color code? Thanks for reply. Regards Kim from Norway

Online Owen

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Re: C12 Wiring Harness
« Reply #1 on: September 12, 2016, 07:03:44 PM »
Have a look at the service sheets for wiring colours. I don't know about wiring length. However you. Can get the wiring bits from
http://www.vehicle-wiring-products.eu/
You might be able to find an automotive wiring specialist nearer you?
1940 C12 (350cc)
1945 C10 & C11
1953 C10 & C11
Most of a B21/3 in need of a lot of tlc

Offline kimver

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Re: C12 Wiring Harness
« Reply #2 on: September 12, 2016, 07:17:24 PM »
Thanks Owen. What size of the cables would you recommend?

Online chaterlea25

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Re: C12 Wiring Harness
« Reply #3 on: September 12, 2016, 07:22:08 PM »
Hi and Welcome Kim,
Heres a link to a new loom
http://www.ebay.co.uk/itm/BSA-C12-Full-Wiring-Harness-Fleece-covered-/252517197526?hash=item3acb32a6d6:m:m8MWx0Zp4A1NiJGqXdQ38DQ

Its hardly worth the hassle of trying to get all the bits and pieces for the loom at this price?????

Theres a series of looks to be added to the ignition switch, these are listed in the service sheets

Regards
John

Online Owen

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Re: C12 Wiring Harness
« Reply #4 on: September 12, 2016, 07:31:22 PM »
I like the fun of making my own looms. I use thin wall 1mm for the low power bits and 2mm for the rest.
John, Do you mean 'links' to add to the switch (blooming autocorrect)
1940 C12 (350cc)
1945 C10 & C11
1953 C10 & C11
Most of a B21/3 in need of a lot of tlc

Online camman3

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Re: C12 Wiring Harness
« Reply #5 on: September 12, 2016, 07:51:01 PM »
That is a very fairly priced loom John has shown link for, crimped, soldered, and well labeled, worth that for the labour alone.
Here is a dirty diagram showing the links if you haven't got already.
Graham
1957 C12
In sunny (sometimes) Christchurch, Dorset, UK

Offline kimver

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Re: C12 Wiring Harness
« Reply #6 on: September 12, 2016, 08:18:21 PM »
I can see the hassle and the fun with making my own harness. With wiring diagram, time and patience think I'll go for the "fun" method. Thanks for link and diagram!

Online chaterlea25

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Re: C12 Wiring Harness
« Reply #7 on: September 12, 2016, 10:12:35 PM »
Hi All,
Did I mean links or loops  ??? ??? ::) ::)

John

Online camman3

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Re: C12 Wiring Harness
« Reply #8 on: September 12, 2016, 10:46:47 PM »
Don't worry John, loops, looks like, links :D
Graham
« Last Edit: September 27, 2016, 09:24:51 PM by camman3 »
1957 C12
In sunny (sometimes) Christchurch, Dorset, UK

Online Owen

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Re: C12 Wiring Harness
« Reply #9 on: September 29, 2016, 10:49:38 PM »
I beg to differ.mloops are rounder than links! :P
1940 C12 (350cc)
1945 C10 & C11
1953 C10 & C11
Most of a B21/3 in need of a lot of tlc

Offline Madorc

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Re: C12 Wiring Harness
« Reply #10 on: September 05, 2017, 09:46:22 AM »
If you are re wiring why not go for 12v, simple, safer, brighter and less links on the PRS8 switch.
Mad Orc

Online sidevalve

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Re: C12 Wiring Harness
« Reply #11 on: December 12, 2017, 05:33:40 PM »
If you stay with 6v then I would use thicker wire all over - most of the problems of 6v are down to volt drop + I would add an extra earth from the headlamp shell direct to the battery earth point. TBH unless you intend to do a lot of night riding I can't see much point in upgrading to 12v. You can fit a modern 6v regulator rectifier unit if you want to cut the switch connections/loops down/simplify the whole thing. Making the loom up would only take an afternoon so why not ?