Posts by samowens44

    Thank you samowens44 for your insight on this. Please don’t take my slow rolling on this As a lack of interest or not being appreciative. Hopefully I will get to test this this week or in the next few days when my plate gets a little cleaner. Believe me, this quandary Is deeply underneath my skin and I would definitely like to go with the resistor as opposed to buying the switchbacks again with the possibility of the new ones failing as well.

    Hey, I understand and am just here as you need help. Keep me updated and I will give you the next step when we get your results from test.

    Could it be the actual turn signal switch on the steering wheel?

    it can not be the signal switch, because it only supplies the Flasher module a signal to start a flashing signal to the turn signal lights. If the switch were bad, it would just interrupt the operation and the lights would just stop flashing and stay off. Dash indicator lights would be off.
    problem is now going to be one of the following:

    Switchback light has a bad driver module that is allowing too much current to flow.
    Switchback is working find, but the LED strip is causing too much current to flow.


    SoCal has proven the entire flasher system is working properly. Problem has to be with the Switchback device. We are now going to test the Switchback and from the results will either change the Switchback for a new one, or add a 100 ohm resistor to the lead that goes to the turn signal lead. I am betting the resistor.

    Allllllright samowens44 here we go.... 245 miles with out a hitch! All stock an no issues. So, with the right side switch back being the one that did not work (left one always did even with the solid green) can we assume that the “little black box “ on the right switch back is the culprit!? And if so is it replaceable without having to buy a whole new set??


    making headway 😎

    Great, you have isolated the problem. We have one other thing to do to determine if the box is bad or drawing too much current. You will need to follow the outline test in my post for testing the switchback lights. You ground the black wire and another lead with pos battery touch the each of the other lead. You can test the swichback by turning the ignition switch to on this should light the white running lights if you left them connected up. Then all you need to to is touch the yellow lead so that it blinks. 1 sec on 1 sec off. The running lights should go out and the amber should blink. Do it for about 10 sec. If it works then the driver is most likely good.

    You can hook a 100 ohm resistor to the yellow lead and the other end will go on the connector. I would finish with installing the resistor in the wire by cutting and soldering in the resistor. Test it first with test leads with clips on the end. Drive test it. I will send you a link to where I got my resistors.

    That will be the final test. You are almost to the solution to the real problem. Keep me updated and I will guide you all the way.

    Hope you had a nice ride today.


    So would we need a heavy duty sec light relay?

    No, the Sec Light relay is just to supply power to the side markers, the secondary lights (the outside Lights in front) and to the Turn signal Flasher Module. The key to the whole problem is that the stock Flasher module needs to be upgraded to a higher range current range to accommodate all the accessories. If one of the Slingmods or Slingshot only, or Twist Dynamics would engineer a higher power Flasher module is the only answer, first one that does will solve the problem for all and we will not be having the trouble. The Flasher Module is the Problem and we can not do anything about it until they provide us with an option. Who will be first. The current Flasher Module is inadequate to handle the new accessories that all want to add. Tell em Sam Owens said that!! Non of the relays are the problem and most likely non of the new mods.

    I remember the days when we only had hands for turn signals.... Hands and fingers....

    In the early days, cars only had one tail light and the tag was mounted underneath it. Flasher was not invented yet, When I took drivers ed in the late 50's, they had us use hand signals our our turns and stopping, hand pointed down and palm facing back. You could easily erase your turn indicator with change in your arm position, and wave it around to signify your final decision of what direction you intend to go.

    Everything works fine before and after the yellow wire disconnect so we shall see.


    Going to have a great ride tomorrow signals or not 😎

    Have a great ride and I hope the TS Lights don't fail, we will have the direction for problem.

    I think the Flasher module when it fails has to have power cycled off to release the fault that is recognized by the Module checking circuit for limits exceeded. I think your test tomorrow will give us some new information to analyze. The system is designed to prevent you from driving with a fault in your turn signal lighting and wiring. It would be unsafe to drive with the flashers not blinking the front light and blinking rear light. but your dash indicators show blinkers working. The problem could also be a grounded lead which would be the high limit failure.

    The safety feature means when you add LEDs or lighting of any kind the the Turn Signal Leads, you can possibly have a night mare to understand when the Module detects something wrong with the current limits. Good Luck my friend.

    I need to add an important piece of information about the Flasher System. The power from the ignition switch does go thru the Sec Lights Relay that is operated when the ignition switch is turned to on position. This is important as if there is a problem with the sec lights relay not operating or bad contacts, you will not have side marker lights and the turn signals will not even start the module to blink as it will have no power on pin 2. So with SoCal problem that is lighting and then freezes would not happen if there was a problem with the sec light relay. It would not even start the blinking process. This will be part of trouble shooting process to arrive at the source of problem.

    Trouble shooting a problem requires you to eliminate all elements that work correctly until you arrive at something that doesn't work. You should also review what the last thing that happened that would have effected the system in trouble. Like an accessory installed to the system in question.

    So for SoCal's problem to start trouble shooting the intermittent operation of turn signals is to disconnect the Switchback LED. Take a test ride and review results. If there is no problem and the lights operate properly, then there is a problem with the accessory lights. There is a driver module that is part of the wiring leads that connect to the turn signals and side markers. If the unit goes bad, that may be the problem, the only solution is to replace Switchback lights with new ones,

    Just for your information, the driver is a programmed device that makes the switchback lights operated in the manner they do, switch from driving light display, turn off driving when turn signal is operated and flash amber lights. When flasher stops, switch back to the driving lites for driving conditions.

    You can test your switchback lights. Look at diagram below.


    would’ve been nice if @getrdone had listed the solution.....


    thank you samowens44 for staying on this. I am so busy at work I am unable to pop the hood and start looking at some of your suggestions. Please don’t take it as lack of interest I am just too busy right now to get into this but it is high on my list when I can.

    Grateful for all of your help!


    Understand SoCal, I figured work takes over and above Slingshot work. The information is there and hope it will help.

    For folks viewing this thread, I want to share some very important information about how the Turn Signal System works. The Flasher Module is the key device that provides all the Flashing of the Front and Rear Turn Signal LED s. The Module is solid state, meaning no relays or moving parts inside. It is a smart device in that it was designed to determine if the turn signal LED s are flashing properly front and back when activated. When you push the turn signal lever to left or right for turns, the flasher module get a signal from a set of contact on the lever that activate the left turn sig circuit. On the first blink action of the module it checks the current that is flowing in the front and rear LED s. There is a range of current that it checks to see that it is met. If the current is too high or low, it will freeze at that point. If within limits, you get flashing.

    When you add external LED accessories to the Turn Signal System you can possible cause this system to go over the limit range of the design of the system. If not over the limits, so close to it that some times it will reach over. Intermittent failure are a good possibility.

    I found all this out trying to install some LED Strip as a indicator that my turn signals are on. All worked fine when the engine was off, when I cranked up the engine, then the Flashing would not occur. When engine is running, the voltage goes up and there is a current increase, this put my system over the limit.

    My solution was to lower the resistance of the Aux LED's to draw less current, putting the system back into limits. It worked. I used a 100 ohm resistor in series with each of the Aux LED leads going to the OEM Left and right LED s

    Look at the simple wiring diagram attached below. I found 100 ohms worked for my LED s, if yours do not work go higher with the resistance, 200 ohms, until it works. You LED will not change that much in brightness.

    Your lights may draw more current than mine. You your are adding side marker addition LEDs you don't have to add this resistor, only on the turn signal leads.


    Here is a view of the Pin Layout of the Flasher module and will show what leads all the OEM turn Signal lights are connected.



    Note: The Flasher Module in held in position by a push pin, no screw. A Good pull downward should allow removal. Here is a video on where and how to remove it if needed.



    If you are experiencing a turn signal flashing failure after installing aux lighting systems to the turn signal leads, then to find out if this is causing your failure, unplug the aux system leads from the OEM turn signal leads. If you signals go back to flashing, then you need to add resistors to the leads before installing. Good Luck, I have been where you are tying to get.

    But looking at the schematic I don’t see any wires the come and go directly to the relays....they go to gang splices.....so I’m not understanding how everything is wired.

    All relays leads are ganged back to the ignition switch power. When it is turned to on, all relays get power. It also puts power on pin 2 of the Flasher thru the contacts of Sec Lights Relay. You can get totally lost trying to follow the wires on that wiring diagram. The service manual has most of the systems with simplified wiring diagrams that show only the leads and components that are a part of the system. That is what you want to look at. The diagram is mostly good for Pin connections id, wire colors, and list of what lead do in the circuit. That is what is most helpful. Also, wiring harness of today do not generally need to follow a wire all the way back to something. Most troubles will be the component, the connector, or a fuse.

    They really messed up on the relay designations and the wiring diagram designations. They make it hard to understand which relay they are talking about. When in doubt, pull it out and see what don't work.

    Thank you so much for the follow up I have had time to read but not lift the hood yet. Just as a bit of information I have a 2016 base model.

    The Flasher circuit is the same on all models. The test I outline explained to unplug the Switch Back should only take a moment and then go for a ride.

    I’m wondering if there is a heavy duty relay replacement?

    Actually there is no problems with the Lighting systems on all of the models now. They have corrected it, so this is not even related to the problem of the turn Signals. If the lighting systems are in trouble we will be having problems of Lights going dark, I thin FunCycle did have an episode of this, maybe he will tell us. The Circuit Beakers are there to protect the wiring and circuits. They are there to open up the circuit, but you loose your lights.

    I wished the dealer had not introduced relays into this problem of the Turn Signal. He just saw it said turn signal, so it must be bad.

    Folks, I don't want to make this complicated for what we are dealing with for SoCal and the turn Signals. We are dealing with just the Flasher and nothing else. None of the lighting systems are involved in this. The Flasher is a stand alone system and is a computer that can monitor the current in the lights, if it is exceeded you don't get a blink.

    The 2015 did not have the Secondary Light Relay, as I stated, they had problems and added it on other years. The 2015 had all lights running off one relay and they had a recall to correct the issue, but no extra relay until following years. Now there is a Primary and Secondary Relay in the Fuze box. On the wiring diagram they call things different than the Relay names. This is common and makes it hard to understand. Look closely and you will see the 2015 has all lights on 30 amps and the 2016 on have the Pri lights on 30 amps and the Aux (Secondary) on 20 amps. This allows for adding more lights to your Slingshot safely. If you overload it, the Braker will shut the whole system down, darkness!


    SoCal Here is something easy to see if your Switch Back lights are causing the problem. I found the installation video online at Slingmods. They use connectors at the Turn Signal leads to hook into. Follow instructions I have outlined and then go for some test rides. Don't need to unhook the other wires, only the yellow on each side. If it still fails, order a Flasher Module and change out. Let's see what your test results are.