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Old 07-26-2013, 08:54 AM   #1
mr.jadkowski OP
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R80/7 turn signal bulb part number?

I'm trying to sort out a turn signal problem on an R80/7. All the bulbs are lighting (one side at a time, correctly), but the flashing is way too fast. It's so fast it almost looks continuous. I checked the all the grounds at the bulbs, and I checked the wiring to and from the relay, and it all looks OK. The only out-of-spec thing I can find is that there are 12V 21W bulbs in all the turn signals. The parts fiche shows 15W bulbs. Is there a common (i.e. auto parts store) part number for 15W turn signal bulbs that will fit? I figure more wattage = more current = different flashing rate from the flasher. I'd like to try the correct bulbs before I order a $60 relay, but if I have to order a special BMW bulb I might as well order all of them at once.

p.s. I tried searching but search appears to be down.
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Old 07-26-2013, 09:34 AM   #2
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Old 07-27-2013, 09:52 AM   #3
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For the record, I'm a dummy and didn't understand how thermal flasher units work. The wattage of the bulbs doesn't have much to do with the rate of flash. Before I realized this, I picked up some 1003 bulbs, which are ~12W vs. ~26W for 1156 bulbs. Interestingly I have the old bulbs (I think they are 1156) installed on one side and 1003 bulbs on the other, and they both light at the same brightness, even though one of them is twice as powerful.

What fixed my fast-flashing problem was replacing the original Hella flasher relay with a #550 from Napa. It takes about five minutes to build a harness to adapt the three-prong 550 flasher relay to the L shaped connector for the Hella, and it works great! $5 relay vs $60 relay, it's a no brainer.
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Old 07-27-2013, 10:03 AM   #4
darklight79
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Super brights. Spend the 125 get turn signal and brake led bulbs. Your alternator will thank you. Much brighter. Its okay to merge new tech with old
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Old 07-27-2013, 12:06 PM   #5
Stan_R80/7
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Quote:
Originally Posted by darklight79 View Post
Super brights. Spend the 125 get turn signal and brake led bulbs. Your alternator will thank you. Much brighter. Its okay to merge new tech with old
How does one wire up the turn signal indicator using components from super brights? I have been trying to figure that one out for a while. Is the LED relay bought elsewhere, but the LED's are from super bright? Or, is the setup you describe using some 'Cafe variant with an Acewell instrument? Inquiring minds want to know.

Stan_R80/7 screwed with this post 07-27-2013 at 12:15 PM Reason: changed suing to using
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Old 07-28-2013, 05:09 PM   #6
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Read led porn on this forum ignatz knows better forgot your working older. Maybe a kissan relay will b needed
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Old 07-28-2013, 06:10 PM   #7
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Originally Posted by darklight79 View Post
Read led porn on this forum ignatz knows better forgot your working older. Maybe a kissan relay will b needed
Yea, I have kept up with the LED pr0n thread and emailed Kisan. The Kisan folks told me a SM-1 (not a SM-6) is needed for my older airhead and a LED must be installed for the indicator light - I think the LED is to act as a diode. The Kissan SM-1 is ~ $100.00 and only has three terminals with no turn signal indicator terminal, so I don't understand how that can work. Or, if it can be made to work that same approach would apply to the $12.00 superbright LED relay. I though you may have more information. No joy.

Throwing away the stock BMW instrument pod and installing an Acewell would solve the turn signal indicator problem. But, I am not planning to ‘Café the bike out anytime soon. Benthic installed a superbright turn signal relay (also three terminal) and got it working with his Acewell but that does not work with the BMW older instrument pod indicator (i.e. no turn signal indicator terminal) in the LED pr0n thread: http://www.advrider.com/forums/showp...&postcount=257


Now returning this thread to its regularly scheduled discussion.
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Old 07-31-2013, 12:42 PM   #8
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Quote:
Originally Posted by Stan_R80/7 View Post
How does one wire up the turn signal indicator using components from super brights? I have been trying to figure that one out for a while. Is the LED relay bought elsewhere, but the LED's are from super bright? Or, is the setup you describe using some 'Cafe variant with an Acewell instrument? Inquiring minds want to know.
Two Radio Shack 1N4001 diodes. Join the negative leads and attach them to the indicator power lead. Connect one diode positive lead to each side's positive lead. This assumes you already have a load independent (non thermal) turn signal relay - two or three wire. You do not need an LED indicator or a Kisan signal minder.
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Old 07-31-2013, 06:21 PM   #9
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Yea, I bought a package of 25 - 1A (1N4001) diodes from Radio Shack some time back. Eventually, I intend to make some diode/wire jumpers with spade end connectors, similar to what Benthic shows. I prefer the spade jumper wire approach as I have no interest in destroying electrical connections that have lasted since 1978. McMaster-Carr sells machine tool wire which I find acceptable: http://www.mcmaster.com/#machine-tool-wire/=nv8afe

I expect a diode will work from each of the turn signal wires to the indicator light. However, the BMW relay bulb burnt out function out will be lost and more wire must be added. If installing LED's works out, and does not turn into another waste of money, I will likely get the proper color wire. The wiring diagram shows black with a white stripe wire to the indicator lamp. But these plans may change, dependent on the bucket wiring configuration.

I am still doing some math on the cost effectiveness of LED's vs standard bubs and coming up with negative numbers. As such, I intend to use the superbright relay with standard bulbs after the wiring changes before spending money on LED's. Aside from flashlights, my experience with LED's has not been great - which is not to say that the LED's go bad, but the associated electronics have failed. Still, it's a hobby - and if its new technology, it must be better: Right?
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Old 07-31-2013, 07:04 PM   #10
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LEDs are good for vibration resistance, long life, less heat, better efficiency. They are not good for price, replaceability. Oh .. they are alos faster to light up .. significant if that little extra time stops you being rear ended!

I'd be tempted to use them for
the instrument lights that are a pain to get to in the K instrument pod.
a supplement to the stop light.

Otherwise a standard normal globe that can be obtained at most gas stations is fine.
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Old 08-01-2013, 04:30 AM   #11
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The closest I ever found to a suitable replacement relay (that does not require rewiring the turn signal circuit) is the LED03 from Tridon in Oz:

http://www.tridon.com.au/Products/Pr...G=478&P=104173

I have yet to find a similar relay in the US. I am skeptical they even sell such a relay in Oz. But, it is in the catalog. Perhaps my hesitation to attack the wiring (aside from lessons learned from having done that before) is the hope that such a relay will eventually become available. Meh.
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Old 08-01-2013, 04:58 AM   #12
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Ambulances and police cars use them. Modern cars use them. They hobby phase of LED's is past. As far as the wiring. I think the color coding thing is overkill. All of the connections can be made on the little terminal board at the back of the headlight shell with two piggyback connectors on the signal leads. The stock wire from the flasher to the terminal board is lifted and replaced with the negative side of the diode pair. No change to the supplied wiring harness is necessary.

These instructions are different from the "normal" instructions found in LED light sites for "metric cruisers". The metric cruisers do not have a dedicated wire from the TS relay to operate the indicator. They use an LED indicator bridged across the two signal wires. To make them work you have to put the negative leads from the diodes on the positive lead of the indicator and provide a new ground for the other side. BMW is different (and easier for once).
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Old 08-01-2013, 05:04 AM   #13
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Quote:
Originally Posted by Stan_R80/7 View Post
The closest I ever found to a suitable replacement relay (that does not require rewiring the turn signal circuit) is the LED03 from Tridon in Oz:

http://www.tridon.com.au/Products/Pr...G=478&P=104173

I have yet to find a similar relay in the US. I am skeptical they even sell such a relay in Oz. But, it is in the catalog. Perhaps my hesitation to attack the wiring (aside from lessons learned from having done that before) is the hope that such a relay will eventually become available. Meh.
There is nothing unusual about theses Tridon three pole SS TS relays. There is a 12v+, 12v-, and signal lead. Here is one, there are others...

http://www.amazon.com/3-Pin-CF-13-El...xp_grid_pt_0_0

You can use a 2-wire flasher unit was well. It leaves of the ground...

http://www.speedwaymotors.com/LED-Fl...rong,8393.html
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Old 08-01-2013, 05:19 AM   #14
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Yes, the Tridon three pin types are common. The superbright LED relay is (likely) a Tridon three pin or knock off. The Tridon LED03 relay linked from Oz is (effectively) a four pin which will replace the stock BMW incandescent relay - pin for pin - and not require any rewiring.

Overkill is what I do when it comes to motorcycle electrical wiring. All my wire connectors are crimped, then soldered, and covered in heat shrink tubing. I intend to use one of the spare spade terminals on the circuit board for each of the turn signals with a Y-jumper to the relay plug indicator terminal. But, I would prefer to find an equivalent four pin relay - for the overkill effect. Overkill: It's not for everyone.

Edit: here is where the black/white wiring may come from, provided this works out: http://www.britishwiring.com/14-Stra...AWG-p/c114.htm

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