L66TEY

Hi Elie, Yes, thats the challenge I have given myself. I also established (thanks to Neil, aka "7 wonders of the world") that my R300 features a rather pricey piece of kit as standard, namely "INSTRUMENTATION CIRCUIT BOARD - R500/SEVEN 485 DURATEC" (39L059A) which the 4 wires from each existing Indicator Button are connected to. In regards to the 4 wires on the existing buttons, Im pretty sure are 2x Ground, 1x LED and 1x Signal wire. If anyone on here has more detailed knowledge about the "INSTRUMENTATION CIRCUIT BOARD" I'd be grateful to hear from them. I've also considered contacting MES, but appreciate in present times they will have more important things to think about/deal with. I had hoped I could establish how to wire the 2x toggle switches direct to the Flasher Relay, and for that to do the trick - but the more I think about it, this solution seems less likely to work - as I expect bypassing the INSTRUMENTATION CIRCUIT BOARD would mean the "green arrows" on the RPM Dial would not flash in sequence with the indicators which for MOT purposes I believe I need to keep intact. Hence, Im now thinking of going down the route of trying to make the 2x toggle switches produce the same output as the existing press buttons do when they are pressed to start the indicators and pressed to stop the indicators. And I believe the solution is to use a 555 Timer with some extra circuitry, as per sketch below (Thanks to a post on "All About Circuits) ref; https://forum.allaboutcircuits.com/threads/generating-a-12v-0-5-sec-pulse-from-either-12v-constantly-on-or-off.102186/ Unless of course, someone can educate me on how the "INSTRUMENTATION CIRCUIT BOARD" works and if I could change an element of this to achieve my goal???

Hi Elie, Sorry, yes I should have made myself clearer. I want to replace the 2x push to make buttons with 2x toggle switches so as to have a left and right hand indicator switch (mini stalk). The Toggle switch I have chosen requires a larger diameter than the original button - and I have already taken the 'plunge' and drilled the left hand side. Hence, super keen to get the wiring sorted. I could really do with a wiring diagram that relates to the "Relay" block for a 2010 R300 Duratec. All help very much appreciated. Chris

Hi All As this is my first 'post' on BlatChat - I'd very much appreciate some help. As a bit of back ground, having wanted a Caterham since my teenage years - I was able to fulfill this dream last July when I acquired an R300 Duatec. Since then, along with enjoying driving it on public roads at any given opportunity (2020 was meant to be the year to get on track, but clearly thats looking very unlikely as it stands) - I've also carried out a few modifications (mainly light related), these are pretty well documented on my instagram profile "chrisl3ete". However, the next modification takes me to a point of beyond my own ability and immediate research via Caterham Cars has not been conclusive to date. Therefore, please would someone assist me with how to wire toggle switches ("RTSA" from Car Builder Solutions") as indicator "stalks" replacing the existing "push to make" original Caterham buttons on an R300/R400 Duratec? As you'll see from the photo Ive been brave (or stupid) enough to drill and place the left hand switch, but havn't figured out the wiring (yet). Looking forward (with hope) to benefitting from the wealth of Caterham knowledge on with the Lotus 7 Club. Thank you in advance. Chris Hi All,