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Originally Posted by alvitdk ... A 4 Ohm resistor at 12V will need an resistor of about 40W, but since it is only 50% on, I would think a 30W

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Old 06-05-2013, 10:34 PM   #16 (permalink)
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Originally Posted by alvitdk View Post
... A 4 Ohm resistor at 12V will need an resistor of about 40W, but since it is only 50% on, I would think a 30W might be enough.
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Originally Posted by wildmark View Post
What does that mean in laymans terms?
Ignore the volts. He was just using that to calculate wattage. You need to ask for a 4 ohm, 30 watt (more watts is OK) resistor. They will probably get pretty hot, so keep away from stuff that might melt.
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Old 06-06-2013, 01:48 AM   #17 (permalink)
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The reason you need the resistors is the turn signal is controlled by a bi-metallic strip, that is, two different metals welded together, when current flows thru them (the correct currrent for incandescent) two pieces of metal heat up and the stress between the two metals (one gets hot faster than the other) causes the metal to bend (until cools off) so you get light on till hot, light off till it cools off, then the cycle repeats endlessly causing the turn signal to blink. Very old school and very ingenious, actually.
The problem with LED's is that they don't draw enough current to heat the strip enough make it stay open long enough, so the strip opens and closes very quickly. Adding the resistors increases the heat so that the bi-metallic strip works correctly.
I'm not sure if our Z's have front and rear Turn signals in parallel, if so then one resistor may suffice, but if not in parallel (or if two lamps needed to heat the strip enough for correct off/on/off timing) then you may need a resistor for each light anyway.
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Old 06-06-2013, 07:56 AM   #18 (permalink)
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What does that mean in laymans terms?
It means the car thinks a bulb is burned out or doesn't exist.
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Old 06-06-2013, 12:12 PM   #19 (permalink)
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It means the car thinks a bulb is burned out or doesn't exist.
Good I get it, where would I get the resisters from?
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Old 06-06-2013, 12:27 PM   #20 (permalink)
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Good I get it, where would I get the resisters from?
PM sent, I only have 4
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Old 06-06-2013, 12:30 PM   #21 (permalink)
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I Google 370z resistor LED and this is one of the sites that popped up:
2009-2013 Nissan 370Z Front Turn Signal LEDs (pair) - 370Z - Nissan - HID & LED by Vehicle - Replacement Lighting

6 ohm
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Old 06-06-2013, 01:02 PM   #22 (permalink)
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The reason you need the resistors is the turn signal is controlled by a bi-metallic strip, ...
There is no bi-metal flasher. The turn signal lamps are directly driven by the BCM. See EXL-82 of 2009 FSM.

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Originally Posted by Fountainhead View Post
The problem with LED's is that they don't draw enough current to heat the strip enough make it stay open long enough, so the strip opens and closes very quickly. Adding the resistors increases the heat so that the bi-metallic strip works correctly.
The BCM monitors current flow to the lamps and goes into fast-blink mode if the current draw is too low. See EXL-15 of 2009 FSM.

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I'm not sure if our Z's have front and rear Turn signals in parallel, ...
The rear turn signal lamps are on separate BCM outputs. The side and front lamps are in parallel with each side on a separate output. See EXL-82 of 2009 FSM.
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Old 06-06-2013, 07:24 PM   #23 (permalink)
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Supplier is sending me two pairs of resistors FOC which is nice and I found a video online how to slice them in, looks simple.
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Old 06-07-2013, 07:06 AM   #24 (permalink)
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Thanks SouthArk,
Now I'm educated did not know the blinkers were BCM (body control module) driven.
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Old 06-07-2013, 08:26 AM   #25 (permalink)
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Thanks SouthArk,
Now I'm educated did not know the blinkers were BCM (body control module) driven.
I had always assumed that it used a bi-metal blinker. Then I started researching for this topic and was surprised to find out that not only is there no blinker, there isn't even an interposing relay.
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Old 06-07-2013, 08:30 AM   #26 (permalink)
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I had always assumed that it used a bi-metal blinker. Then I started researching for this topic and was surprised to find out that not only is there no blinker, there isn't even an interposing relay.
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