Mounting Resistors for Rear Turn Signal LEDs
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Mounting Resistors for Rear Turn Signal LEDs

This is a discussion on Mounting Resistors for Rear Turn Signal LEDs within the Focus RS Lighting forums, part of the Focus RS Garage category; Branching off from this post: https://www.focusrs.org/forum/32-focu...ml#post1281057 Those of you who have installed LED rear turn signals with the resistor kit, such as the one by ...

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Thread: Mounting Resistors for Rear Turn Signal LEDs

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    RS Master apextheorem's Avatar
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    Mounting Resistors for Rear Turn Signal LEDs

    Branching off from this post: https://www.focusrs.org/forum/32-focu...ml#post1281057

    Those of you who have installed LED rear turn signals with the resistor kit, such as the one by Diode Dynamics (https://www.diodedynamics.com/store/...category/1487/), how and where did you mount the resistors? Ideally, I would like to avoid drilling holes into the metal. I saw that there is a factory hole in the metal on the inside, accessible from the trunk. It may be possible to use this hole to mount a bracket on which the resistor can be mounted, though on the driver side, there is a factor wire harness connector that is mounted relatively close by.

    Has anyone found other places to mount the resistor that do not require drilling into the metal?

    Also, does anyone know how hot the turn signal resistor would get?

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    RS Pro j0shm1lls's Avatar
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    I just used some 3m double sided tape and stuck it to the metal below the harness. I don't have any pics right now but I can take some tomorrow if you'd like... I've had them on for a couple months and they're still solidly mounted.
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    RS Master apextheorem's Avatar
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    Thanks, Josh. Are you using the 3M mounting tape? If so, are there any concerns with heat dissipation with mounting with that kind of tape since its foam material would act like a heat insulator?
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    While the turn signals aren't on for extended periods of time, I still think it's a poor idea to use double stick tape on resistors. Those things can get super hot. I actually had one melt my intake duct on my f150 because I didn't secure it well enough. I'm not sure which resistors DD sells, but the only ones I would ever use are the Morimotos from RETROFIT SOURCE. Those run much cooler.

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    I riveted them to a piece of thin sheet metal and hot glued it to the housing. The metal helps dissipate the heat a little better.

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    I also used 3M mounting tape and wire tied the wires at each end to the existing light wiring. These resisters don't get hot and I left the hazard lights on for a few minutes to test that out. I did the same thing to my 2014 Escape when I installed the Kuga rear tail lamp assemblies (wanted the European LED look). It's been over 3 years and they are still doing just fine. The resistors have not come off of the tape and no plastics or wiring distorted from heat.

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    Quote Originally Posted by BrianH87 View Post
    While the turn signals aren't on for extended periods of time, I still think it's a poor idea to use double stick tape on resistors. Those things can get super hot. I actually had one melt my intake duct on my f150 because I didn't secure it well enough. I'm not sure which resistors DD sells, but the only ones I would ever use are the Morimotos from RETROFIT SOURCE. Those run much cooler.
    I had a similar kit on my ST for two years and no issues. I'd be more worried about ambient temps and sitting in the sun, frankly. I like @RS_Gav 's solution.

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    RS Master apextheorem's Avatar
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    Quote Originally Posted by RS_Gav View Post
    I riveted them to a piece of thin sheet metal and hot glued it to the housing. The metal helps dissipate the heat a little better.

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    That's a pretty elegant solution. I think I'll try to go that route with mine.

    Are there any concerns with the wiring being close to the top side of the resistor?
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    Wait, you are putting a 50 watt resistor in there plus the leds so you can run more efficiently than a 26 watt bulb?????
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    Quote Originally Posted by halleffect View Post
    That's a pretty elegant solution. I think I'll try to go that route with mine.

    Are there any concerns with the wiring being close to the top side of the resistor?
    Hasn't been a problem so far. I have taken the tail lights out a couple of times to inspect and the wiring is fine.
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