Mazda Rotary Club

General => General Technical => I. C. E. & Electrical => Topic started by: oliverash on September 05, 2007, 08:49:15 AM

Title: LED bulbs
Post by: oliverash on September 05, 2007, 08:49:15 AM
Can anyone help with the location of the flasher unit for the indicators?
 
I want to fit LED bulbs and will need to replace the original unit with one that corrects the flashing speed.
 
I thought the TNS Relay stood for Turn Signal Relay but that unit is completely different to the replacement one iv come across.
http://www.ultraleds.co.uk/advanced_search_result.php?keywords=flasher&categories_id=&inc_subcat=1&manufacturers_id=&pfrom=&pto=&dfrom=&dto=&x=54&y=18 (http://www.ultraleds.co.uk/advanced_search_result.php?keywords=flasher&categories_id=&inc_subcat=1&manufacturers_id=&pfrom=&pto=&dfrom=&dto=&x=54&y=18)
 
Am i looking in the wrong place?
 
I know i could fit resistors but id prefer not to cut the original wiring as i did that on my bike and it looked like a bit of a bodge job to be honest.
Title: LED bulbs
Post by: Prof on September 05, 2007, 09:33:14 AM
On the FC\'s it\'s built into the \'CPU\' so its a bespoke unit and not replaceable. :(
 
However, all is not lost, and a pair of large power resistors can be wired in parallel with the bulbs to give the same loading and hence maintain the flash rate.
 
I used 4.7 Ohms 50W which produce a 3 Amp load ~= 36W which is a bulb and a half if your using the 21W indicator bulbs (the LED bulbs do present some loading so this seems to work quite well) - the speed of flash seems fairly close to the original.
 
Not sure on the FD\'s, but the earlier model cars share similar electricals.
Title: LED bulbs
Post by: oliverash on September 05, 2007, 06:32:32 PM
ah right. resistors it is then or maybe il just leave it for the time being. i was after the easy option, as you do.
thanks for the info tho
Title: LED bulbs
Post by: sparkgap on October 10, 2007, 07:00:42 PM
Doesn\'t putting in resistors to simulate a filament kind of defeat the powersaving plus of LED\'s?
I\'m looking into this before I purchase some LED\'s for the whole car.
I think the FD has an electronic rather than thermotime regulation of flashing.
 
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