Fastest and easiest way to install flash module? - Honda Shadow Forums : Shadow Motorcycle Forum
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post #1 of 34 (permalink) Old 05-10-2019, 05:27 PM Thread Starter
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Model: Shadow VT1100T
Year: 1999
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Fastest and easiest way to install flash module?

On a 1999 Shadow VT1100T, what would be the fastest and easiest way to get to the brake wires that also had room to put the module?

Also, I only need one flasher for this bike, right?

Thanks in advance.

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post #2 of 34 (permalink) Old 05-10-2019, 05:35 PM
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Check under the seat area for the wires. Many modules are very small with just a couple of wires to connect.


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post #3 of 34 (permalink) Old 05-10-2019, 08:39 PM
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Model: Non Shadow 1982 Honda GL500I SilverWing Interstate, two cyl. transversive "twisted"twin
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My 96 VT1100 ACE signal module is between the gas tank and the steering stem on the left from the seat.When I went to LED turn signals I had to go to this one.https://www.superbrightleds.com/more...asher/193/841/ .I had an issue with the single indicator light and went with this two diode kit.https://www.superbrightleds.com/more...iode-kit/1190/. A better diagram.

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post #4 of 34 (permalink) Old 05-13-2019, 06:59 AM
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Just installed a BackOff module yesterday on my 2004 Shadow Spirit VT1100. As Swifty noted, under the seat is the easiest location--one wire going to the brake lights.

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post #5 of 34 (permalink) Old 05-14-2019, 12:15 PM Thread Starter
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Thank you everyone for chiming in. Whenever I get the time to do this I may end up posting here again, but until then, thank you.
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post #6 of 34 (permalink) Old 05-24-2019, 09:29 PM Thread Starter
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Found the wires while working on the oil in my air filter, I just am not sure what wires to splice into. How do I know which I should be doing this to?
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post #7 of 34 (permalink) Old 05-24-2019, 11:01 PM
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Green/Yellow should be your brake light. I usually make pigtails at the plug rather than cut into the harness.

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post #8 of 34 (permalink) Old 05-25-2019, 12:30 AM
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Probably separate the connector there for the yellow/green brake wire and insert your wires from the module.

And green wires are always ground in case you need a ground connection too.
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Only a biker knows why a dog sticks his head out of a car window.
1983 750 Shadow
From the past=
1951 Cushman scooter
1962 Honda 305 Dream
1965 Honda 305 Dream
1971 Honda 175 scrambler
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post #9 of 34 (permalink) Old 05-25-2019, 01:52 AM Thread Starter
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Quote:
Originally Posted by smilie View Post
Green/Yellow should be your brake light. I usually make pigtails at the plug rather than cut into the harness.
I'm used to sound systems in cars and am not entirely sure what you mean by "pigtails", and since Google showed me SEVERAL different things, would you mind clarifying for me a bit? If it's easier or even just makes a better connection...or just more professional..I am happy to do it the right way.

Quote:
Originally Posted by swifty2014 View Post
Probably separate the connector there for the yellow/green brake wire and insert your wires from the module.

And green wires are always ground in case you need a ground connection too.
IIRC the flash module had 2 input wires and 2 output wires (the flashers are in the hard bags and can't check ATM). Would I simply attach the negative to any standard ground, or am I missing something?

EDIT: Looks like it's 2 in and 1 out

Last edited by Gymjunkie; 05-25-2019 at 02:36 AM.
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post #10 of 34 (permalink) Old 05-25-2019, 10:12 AM
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Let's recap what we know so far.

1) You want to install a "flash module" into your brake light circuit.

2) Since you never explained exactly what you meant, one poster thought you meant the flash module that controls your turn signals and posted a nice schematic and parts list.

3) You never responded to him, so we are left thinking he either solved your problem or his answer had nothing to do with your problem.

4) Another poster thought you may be referring to a "Back Off Flash Module" but your last post indicates this can't be correct either because you say you have 3 wires on your flash module, and the Back Off Module has 4 wires on it.

5) As it stands right now, you could actually be looking at a 3-wire turn signal flasher that the previous owner installed for something other than controlling brake lights.

6) The other possibility is that you might be under the impression that a 3-wire flasher relay can be used as a brake light modulator.

Until we get some answers as to what exactly you have, and what you are working with, and what you plan on installing (you asked earlier if one flasher would be sufficient), then we are going to continue going in circles as people try to 'guess' exactly what you are doing, and with what.

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