CDM2018 Posted May 8, 2020 Share Posted May 8, 2020 My warning light came on after my once a week journey go on 40 mile round trip so spend a couple of hours with my young daughter and light came on when I arrived on return journey light came on half way ? not serviced car for a year but only done 5k admittedly journeys of no more than 70 miles I know or think that my brake pads and discs are wearing is this related ? Or are my tyres wearing related ? any help thanks Link to comment Share on other sites More sharing options...
pa28pilot Posted May 27, 2020 Share Posted May 27, 2020 Most likely, your multi-stage Brake Light switch is faulty. The switch provides a signal to the ECU/ABS in addition to triggering the brake lights. The switch generally appears okay to a simple continuity test on both sets of contacts, but contact-phasing is critical. If signalling is out, you get the warning lamp - and shut down of stability and cruise control systems. The first pair of contacts (that directly feed the ECU and nothing else) are normally-closed - and open upon first pressure of the brake pedal. The first pair contacts ensure that Cruise Control is signalled to disengage - prior to closure of the second set of contacts that (a) illuminate the brake lights and (b) provides a trigger input to the ABS control module. Either way, behaviour would suggest that timing is causing an error condition with inputs to the ECU/ABS modules. A new switch is the simple fix - approximately £65 from your favourite Lotus dealer. For info, the switch that came out of my Exige Roadster (same part) has three GM part numbers molded into its casing: 09 132 299 / 09 175 172 / 09 175 185. A trip to your local Vauxhall dealer will likely result is a worthwhile saving. Link to comment Share on other sites More sharing options...
CDM2018 Posted May 30, 2020 Author Share Posted May 30, 2020 Cheers the light went out for a few times I drove the car and then came on then went out on return journey this week? so I am hoping to get car serviced at a newly opened LJR garage who have experience of Lotus as they are a minute drive from me I seldom use cruise control but wonder if I get this after washing the car ? i am not good at tech side actually a real spanner don’t understand so apologies if I appear a little dim ? Link to comment Share on other sites More sharing options...
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