RedHOT411

I've been reading a ton of threads on here and it seems that the resistors get very hot that are inline with the turn signals.

Partsexpress has some 8ohm 100watt resistors... partsexpress.com search 019-020 link won't post correctly

I think I understand how the resistors work...
13.5 volts @ 8 ohms should be 22.78 watts... which is a little higher then the stock bulb which is 21 watts.... and since this can handle 100 watts it should dissipate the heat pretty well.

I plan on trying these in my car with the new switchbacks. But before I pull the trigger I wanted to know what people think? I'm surprised no one else has thought to go this route so... maybe my logic is flawed and they will not work.

Let me know what you think.

Thanks
-Mark

rockyfeller

iTrader: (6)

what is your idea here? are you trying to wire both sides to 1 resistor?

RedHOT

I was thinking 1 per side... I just figured @ 8ohms it will actually draw less power then then the 6ohm ones everyone is buying and since these ones are 6-1/2" L x 1-9/16" W x 3/4" H they shouldn't get as hot... There was another thread where someone mounted them in his trunk so space wouldn't be an issue.

BrianC636

The ones that Autolumination sells is 1 per side but it's a 3 ohm/50 Watt.

RedHOT411

I'm very confused... If the autolumination ones are 3ohm @ 13.5v's they would draw 60.75 watts of power? Am I doing something wrong with my math? Thats a lot of extra power and that would explain why everyone says its gettings so hot.

Tripnbeats

resistors have to get hot....thats what they are made for.... thats how they control the flow.
They get hot because of 2 reasons.....the load (ohms) isnt correct. or it is. if it isnt the correct one, the resistors blow.....if it is correct the resistors last. but regardless they shouldnt get blistering hot unless the load is there for a very long time (over 30secs). if they are getting hot just from a few pulses then theres a problem.

RedHOT

Made my decision... I will let everyone know my results... ended up getting 2 4ohm resistors rated for up to 100watts each.

I expect them to draw 45.6 watts for each side... stock is 42 watts (assuming 2 21watt bulbs. I'll end up drawing 7.2 watts(1.8w per bulb) more then stock when all is said and done + whatever the LED lights draw. Comparing this to the 3ohm configuration which is 60.75 watts per side or a total 75 watts(18.75w per bulb) more then the stock configuration.

Also because these resistors can handle 100watts of power they should stay relatively cool even when the blinkers are on for a couple of minutes.

Hopefully this works out...

One more question... If I want to use 1 resistor per side I need to change out all four bulbs with LEDS correct? And then is there anything else special I need to do with the wiring?

RedHOT

Confirmed working. The resistors I picked out do not even get hot to the touch. Blinker is working at normal speed. Don't have any pics yet... Only one side installed so far.

RedHOT

Finished installing both resistors in the trunk today. I have to wait for the correct front LED's to come since the Type S doesn't use 7443's in the front.

Here is a picture of the resistor, I attached to zip ties around it so I could attach other zip ties to them to mount it in the trunk without having the metal on metal:


Here is a picture of the Rear Driver side wheel well there is not too much to see. The resistor is attached behind the big metal bar with all the wiring, I used a bunch of zip ties so I didn't have to drill anything. I did the same thing on the passenger side but didn't take any pictures.



And finally here are 2 pictures of the final product, Blinking at normal speed not that you can tell...


As I said before the resistors do not even get hot. I will post pictures of the switchback's once I get the right ones.

Enjoy.

jguerra23

Where did you purchased the resistors

RedHOT

Parts Express

Search for 019-015

Thats the 4ohm 100watt, use 1 per side.

Fulani has a TL

iTrader: (1)

Don't the resistors have to be in contact with metal in order to dissipate the heat? Won't the zip ties melt and cause some havoc on ya?

jguerra23

Thanks...

Tripnbeats

they get super hot but for momentary use they shouldnt get hot at all maybe a few degrees but not much..... ur best bet is using zip screws (self tappers) to get it mounted.

RedHOT

The resistors I am using do not get super hot at any point in time.

RedHOT

The resistor is inside of the huge metal heatsink. So its getting hot inside of that. But since we are drawing less then half of the rated 100w for only a very short interval it stays cool.

Tripnbeats

red I wouldnt expect them to...... it momentary signal if it was constant id expect them to, as thats what a resistor does, balance the load and disperse the unneeded power into heat.... if its getting really hot then its the wrong load correction. you have to probe the lines..... I havent done the mod.... but when i clear my lights (probably next week) im going to probe the lines and check what the load is and what kind of resistance is actually needed to balance the LEDs without that much heat, but if u say that works ill try it.I cant mount it in the same location as you because I fiberglassed my whole trunk so Id have to take a part a lot of things to mount in it there. Il just do it somewhere else

RedHOT

You will find that my numbers are pretty close. Let me know what you come up with when you do the probe.

kreg37

how did you splice this into the existing line? it doesn't look like it has those self-splice clips.

keep us updated on how it works once the fronts are installed.

Kennedy

iTrader: (2)

So I'm clear... you have leds in the front and rear?
and only have 1 100W rated resistor installed per side, in the rear?

That's cool.

I was under the impression you had to install one at every corner if you wanted to run leds in all 4 corners.

RedHOT

I don't have LED's in the front yet but as per a bunch of other threads you only need to install them in the rear as long as they draw enough wattage. So @ 4ohms I will be drawing just over the stock amount of wattage that 2 bulbs would draw. I will be 100% positive later this week when the correct switchbacks come.

RedHOT

There are 2 wires that come off of each rear light, you just use a tap splice (homedepot 16-14ga 4pack), pretty easy.

mmade22

Kennedy, it's not needed to do it at all four corners. As long as you have a big enough resistor (100 watts) that will work both lights per side. 50 watts will run both lights per side but 100 is better. I ran 2 50 watt (100 watt total) on my car and it doesn't get hot. Redhot great write up and good job on the install

Kennedy

iTrader: (2)

^ Thanks.

Didn't catch that in the other posts...

Looks like I'll finally get around to doing these now.

RedHOT

Thanks, I actually used your write-up to figure out what to tap into.

mmade22

Glad I could help you out and sorry for being an ass to ya on my post. I was little drunk after the super bowl.

RedHOT

lol. it's cool man no worries.

RedHOT

All 4 LED's installed... Still blinking at normal speed.

Kennedy

iTrader: (2)

Just received the parts express resistors redHOT specified...
HOLY SCHNEIKES. They're as big as a television remote control.

Quick question.

Any concern about putting these large resistors on the back, doubling the load on the rear wiring? Given these resistors simulate the load applied by both bulbs... Noones afraid the wiring may overheat?

RedHOT

Only adding an extra 20ish watts per side... The wiring can handle it IMHO.

keunho

hey Red, I got a question!

i got the resistors from partsexpress for 4ohm 100w...

but, now i dont know which wire to tap it too... did you solder to the wires?

Sorry... i am very noob to these electrical wiring stuff.... Im very lost T.T...

RedHOT411

I tapped into the Rear turn signal wires with tap splices. There should only be 2 wires on each side so 1 resistor on each side.

keunho

oh i see.. i found those 2 wires.. black and red right?

haha hey did you cut off the ring on the resistor and tap it? or.. did you cut the wire and put the wire into the ring and tapped it?

i know i am very annoying, but i don't know what to do ^^ hehe thanks Red~!

Fulani has a TL

iTrader: (1)

If you tap wires using a wire tap, one wire (the main wire within the car will feed through both sides of the tap, the second wire (the one feeding the resistor) will be in the second slot that has only one opening.

Cut off the ring on the resistor.

I just ordered these resistors, they only had three in stock when i placed the order!! So some of ya'll may wanna wait a lil bit before you order.

__________________
Kansas City/Missouri Meet!!!

keunho

ay so make things easy... cut off the rings on the resistor ( both wires ) and tap it to one black and one red wires... right? That's how i understand this electrical deals. correct me if i am wrong!! please so i wont mess up tonight ^^

keunho

GREATTTTTTTTTTTTTTT I FINALLY GOT THE CRAZY LED BLINKERS TO WORK NORMALLY!!! hehe thanks for all the help Red!! and Fulani!! mad props!!!

Trew

iTrader: (1)

Had to revive this to get some help...

I plan on installing 2 30 LED switchbacks for the front turn signals only. I bought 6 ohm resistors, but I want to install them in the rear, just because it's easier to access. Can anyone tell me if there would be any issues with this? Would it work properly?

Thanks.

thomodachi

That will work fine. That is what I did to mines except I used only 3 ohms@50w for each side. Just make sure when you mount the resistors, they do not end up touching the liner and you should be good.

Trew

iTrader: (1)

awesome, thanks!

voigt

Has anyone had any problems yet?