DVD3500 Posted March 1 Share Posted March 1 I am breaking my project down into "modules" i,.e suspension, body, motor/transmission etc and one big aspect is more or less restoring/upgrading the wire loom i.e. electrics. I presume it was done according to some British standard. I actually have 2 looms from the two cars I bought (`72 European and `76 Federal) plus a guy gave my a European MKIV loom of unknown model year so I have lots to check. However, should I need to replace a wire/cable I would want to get as close to original as possible (or even slightly larger...) I did several searches but all I could find was the European standard: https://en.wikipedia.org/wiki/IEC_60228 But I am not sure what standard was used on our cars so no clue what the equivalents are. (I do have the Lucas chart for the standard of what colors are used for what on a typical loom) Just buying a new loom doesn`t make sense because the car will have multiple upgrades such as relays for headlights, upgraded heater, possibly subtle DLRs/fog lights etc... Engine mgmt will also be nonstandard... Cheers and have a great day! Quote Link to comment Share on other sites More sharing options...
Amy Wade Posted March 1 Share Posted March 1 (edited) The wiring colours were done to BS-AU7, there was a later revision BS-AU7a which was introduced just after Triumphs stopped being produced. As for wire gauges, you'll have to calculate current draw/voltage drops for your circuits. BritishWiringColours-BS-AU7.pdf Edited March 1 by Amy Wade 1 Quote Link to comment Share on other sites More sharing options...
JohnD Posted March 1 Share Posted March 1 DVD, You asked in Another Place, and I suggested there that you looked for a bespoke loom maker. Here are some: https://www.stmotorsport.net/ https://www.autosparks.co.uk/bespoke-wiring (They offer off the shelf Spitfire looms, so bespoke should be easy) In fact a Google search for "bespoke vehicle wiring looms" finds dozens of makers. Good luck, JOhn Quote Link to comment Share on other sites More sharing options...
DVD3500 Posted March 1 Author Share Posted March 1 Hi John, Thanks. Yes I know cross posting is not the zenith of online social etiquette but quite a few people tend to stick to only one forum or t`other so I figured no harm no foul. 🙂 I really don`t think getting a specialist to do it is 100% necessary mostly because I have an automotive electrical engineer willing to help me but his eyes glaze over when I mention Lucas or British/Imperial standards. So for full transparency he asked me the above question and I figured I would ask. Quote Link to comment Share on other sites More sharing options...
Steve AKA vitessesteve Posted March 1 Share Posted March 1 https://www.farrellsgarage.com/tech_assets/LBC_wire_chart.pdf Another item from Farrellsgarage shows a comparison of Lucas and US wiring guage. 2 Quote Link to comment Share on other sites More sharing options...
Howard Posted March 1 Share Posted March 1 The critical thing to ensure is that the cable is rated for the upstream fuses! The original Lucas fuse rating are not the same as for modern fuses which are rated for the continuous load so a Lucas 50A is rated as a 25A modern fuse. See table below:- 1 Quote Link to comment Share on other sites More sharing options...
JohnD Posted March 1 Share Posted March 1 (edited) DVD, no problem, just that I'd found those makers and couldn't be bothered to go back to Another Place! If your specialist can't/wont work with old BS standards, but you want an original style loom, why go on employing him? You are the customer! John Edited March 1 by JohnD Quote Link to comment Share on other sites More sharing options...
JohnD Posted March 1 Share Posted March 1 (edited) DVD, no problem, just that I'd found those makers and couldn't be bothered to go back to Another Place! If your specialist can't/wont work with old BS standards, but you want an original style loom, why go on employing him? You ate the customer! John PS over at Yet Another Place someone has found a loom maker who will add to the OE loom design: https://www.tr-register.co.uk/forums/index.php?/topic/86025-tr4-loom/#comment-821575 Edited March 1 by JohnD 1 Quote Link to comment Share on other sites More sharing options...
DVD3500 Posted March 4 Author Share Posted March 4 On 01/03/2024 at 13:52, JohnD said: DVD, no problem, just that I'd found those makers and couldn't be bothered to go back to Another Place! If your specialist can't/wont work with old BS standards, but you want an original style loom, why go on employing him? You are the customer! John He works for free. 😉 Well... beer... but I was going to drink that anyway! ;D Quote Link to comment Share on other sites More sharing options...
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