Join Date: Dec 2011
Location: Midlands, UK
Thanked 25 Times in 21 Posts
Feedback Score: 0 reviews
EU law / Construction and Use requires that the lighting indicators flash at a double rate when a bulb has blown to alert the driver to the problem (though most people don't even realise what it means) and drive around regardless.
This is achieved by the flasher IC contained inside the relay.
All the modified relay does is not link up that part of the circuit, so whatever the load on it, it will only flash at the regular rate. DO not worry about your relay flash speed, it will be fine.
The ability of the relay to flash at double rate will never be tested in an MOT however, will never be checked by police and I'm not 100% sure it's a requirement in the UK.
I could have told you how to modify your original relay to do exactly the same thing if you were willing to cut it open.
Of course we all check all of our lights at the start of each trip as required so we would notice anyway.
As too why they don't use LED's as standard: Cost, additional circuitry required to sense blown bulbs, type approval, not a standard so very few certified parts available, and most people simply don't care...I guess they are a few of the reasons, sure there are more.
Ref yours grips....HID conversion will use a lot less power once fired up, and be brighter as well, giving the grips a better chance