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new member ....D7 having problems with wiring
First Gear User
Site Member
Forum Posts: 1
Member Since:
May 15, 2020
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May 21, 2020 - 11:41 am
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Hello all fellow Bantam members..... i have recently joined the forum having bought my first D7.....the model with two switches on the headlight. i managed to get it going after it was last ridden in 1979 .... but the lights were not working. The wipac lighting connection was damaged, so i thought i would buy a new lucas wiring loom ...i have wired it together and SORRY !!... i guessed at the wires .... but it would start when the switch was on " E" The next day i was messing to get it to start on " I "  and i changed the polarity wires on the battery ...SORRY AGAIN !!...and the fuse blow ...so i put the polarity correct on the battery put a new fuse in.. .. but now there is no spark .... i may have damaged the rectifier or a wire? but before i go any further, i would like to get the wiring correct, and then hopefully trace if i have damaged the rectifier or coil or burnt a wire out !! ...  so my questions are  ....  the three wires that go to the rectifier ...white - brown - orange ... where do they go to on the rectifier? and where do the 4 wires to the generator go? ... red - orange - white - red and white ( control breaker ) ..... the wires to the generator are not connected to the loom - its just to show the generator .... thank you for any help .... and i promise never to do anything on the D7  without checking its correct first !!  kind regards dave 

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Forum Posts: 850
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April 19, 2018
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May 21, 2020 - 11:55 am
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Hi Dave and welcome to the Forum. Oops! Sounds like you need a wiring diagram 🙂 We've got plenty, as well as loads of friendly help and advice. Your electrical system is one that throws up more queries than any other. Try "D7 wiring bantam forum" on Google. You'll find it's a topic of much debate 🙂

You will find just about everything you could ever want on the Forum via the FAQs and technical sections;  ** Please log in to view **

Have a good nose around the forum and enjoy your project! Looking forward to seeing your progress.

All the best,


'52 D1 direct lighting plunger; '58 Square Four (project); '55 D3 Battery; '59 D1 direct lighting plunger;  '59 Tiger Cub; '60 5TA;  '76 FS1-E '97 Honda Sky SGX50.

Top Gear User
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Forum Posts: 1601
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January 9, 2013
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May 22, 2020 - 9:13 am
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mmmmmmmmm  this seems  to     crop  up  a lot    the    harness  / loom  serplyer   tacks almost  £ 60   and   thers  NO    20  pence   copy  of   a dyagram    of the  looms thayv  sent      that   would  also conferm   the  correct    loom   ,.   so  thers  a  lot   outther     milking     the  clubs  funs  a    no  comment   on this  post   is  needed       thanks    giys       

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