Author Topic: LED rear light question  (Read 1271 times)

Offline MarkCR750

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LED rear light question
« on: September 07, 2014, 05:21:01 PM »
I just bought this on ebay, I didn't notice it was LED until after I had bought it, will I need to fit a resistor or something for it to work (or is that just LED indicators) or will it just wire into the standard cb750 loom?, cheers Mark.

http://www.ebay.co.uk/itm/231288200981?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
« Last Edit: September 07, 2014, 05:23:00 PM by MarkCR750 »
Suzuki GT250A (Nostalgia)
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Ducati 900SS (Soul & Speed)
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Offline K2-K6

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Re: LED rear light question
« Reply #1 on: September 07, 2014, 08:38:43 PM »
As I understand it the indicator circuit requires the resistance of the two bulbs plus the instrument repeater as a total load to make the old type indicator flasher unit (a fairly crude but simply effective device) flash at the correct or any rate at all and so function as it should. Leds just don't generate the circuit load to achieve this so need something built into the circuit to simulate the original load but as far as I can see this is not applicable to a tail and stop light as there is no minimum resistance required to make the circuit operate.
If the product is listed as 12v supply then you should just be able to put it onto a car battery to check it as it should need nothing special to run it.

Offline MarkCR750

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Re: LED rear light question
« Reply #2 on: September 07, 2014, 08:46:43 PM »
Thanks K2
Suzuki GT250A (Nostalgia)
1977 K7 CR750 (lookalike, what of I’m not sure)
Ducati 900SS (Soul & Speed)
Ducati M900 Monster (Handling & character)
Thruxton 1200 (suits me)
James Captain 197 (pure adrenaline, i.e. no brakes!)
"Eff yir gitten awvestear yir gooin te farst"
Sir J.Stewart.

Offline Bryanj

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Re: LED rear light question
« Reply #3 on: September 08, 2014, 06:39:38 AM »
I would rubber mount it with a ground wire as on the Trucks the LED's don't like vibration mate

Offline MarkCR750

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Re: LED rear light question
« Reply #4 on: September 08, 2014, 04:00:14 PM »
Thanks Bryan, will do.
Suzuki GT250A (Nostalgia)
1977 K7 CR750 (lookalike, what of I’m not sure)
Ducati 900SS (Soul & Speed)
Ducati M900 Monster (Handling & character)
Thruxton 1200 (suits me)
James Captain 197 (pure adrenaline, i.e. no brakes!)
"Eff yir gitten awvestear yir gooin te farst"
Sir J.Stewart.

Offline Cabilao

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Re: LED rear light question
« Reply #5 on: September 10, 2014, 12:55:18 PM »
i have the same,works perfect with the original wiring.

cheers
Uwe
before:
Kreidler RMC(50cc)
CB400N(first bike)
RD350LC(more than one)
XS850(great bike)
CB900F(wish i still have it)
FZR1000(too fast)
Rickman CR900(sold for a good price)
now:
TMX 155(just for fun)
CB750P7 (current Project)

Offline MarkCR750

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Re: LED rear light question
« Reply #6 on: September 10, 2014, 09:36:31 PM »
Thanks Uwe
Suzuki GT250A (Nostalgia)
1977 K7 CR750 (lookalike, what of I’m not sure)
Ducati 900SS (Soul & Speed)
Ducati M900 Monster (Handling & character)
Thruxton 1200 (suits me)
James Captain 197 (pure adrenaline, i.e. no brakes!)
"Eff yir gitten awvestear yir gooin te farst"
Sir J.Stewart.

 

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