LED turn signal damage.

NZ.Z · 02-21-2017, 12:02 AM

I recently changed the turn signal bulbs to LED and used resistors to prevent the hyper flash.
Yesterday I was told by an auto electrician that Nissan use a Body Control Module to control all of the electrics and that the resistors could quite easily fry the module which would then cost $1500 - $1600 to replace.
He said that this could happen at anytime, a week, 4 months a year or years after fitment.
I've never heard of it happening before but was wondering how true it is and why it does it?

Could anyone shed any light on this?

Silverstone · 02-21-2017, 06:54 PM

I've never heard of that. Resistors are to bring the wire resistance up to the same as an incandescent bulb would provide. Not sure how it would damage the BCM.

My 370Z has LEDs with resistors in each corner, as does my Murano. The Murano experiences a random hyperflash every now and then, but the 370Z has been fine.

SouthArk370Z · 02-21-2017, 08:19 PM

Quote:

Originally Posted by Silverstone

... Resistors are to bring the wire resistance up to the same as an incandescent bulb would provide. ...

The resistors are in parallel with the lamps so they lower the circuit resistance. If a resistor with insufficient resistance is used, there is a chance of causing damage due to too much current - but the fuse is supposed to prevent that.

Silverstone · 02-22-2017, 09:16 AM

I had my thinking backwards.

Burnt filament = infinite resistance. Silly me.

Not sure how this would pop a BCM.

02-21-2017, 12:02 AM	#1 (permalink)
NZ.Z Base Member Join Date: Jan 2016 Location: Tauranga, New Zealand Posts: 39 Drives: 09 370z, platinum t. Rep Power: 9	LED turn signal damage. I recently changed the turn signal bulbs to LED and used resistors to prevent the hyper flash. Yesterday I was told by an auto electrician that Nissan use a Body Control Module to control all of the electrics and that the resistors could quite easily fry the module which would then cost $1500 - $1600 to replace. He said that this could happen at anytime, a week, 4 months a year or years after fitment. I've never heard of it happening before but was wondering how true it is and why it does it? Could anyone shed any light on this?

02-21-2017, 06:54 PM	#2 (permalink)
Silverstone Base Member Join Date: May 2015 Location: MN Posts: 120 Drives: 2010 Nismo #0507 Rep Power: 32	I've never heard of that. Resistors are to bring the wire resistance up to the same as an incandescent bulb would provide. Not sure how it would damage the BCM. My 370Z has LEDs with resistors in each corner, as does my Murano. The Murano experiences a random hyperflash every now and then, but the 370Z has been fine. __________________ 2010 Nissan 370Z NISMO #0507 ARC \| ARK \| Defi A1 \| HKS \| JL Audio \| Motul \| Pioneer \| Setrab \| South Bend Clutch \| TheRetrofitSource \| Tommy Kaira \| Toyo \| Wicked CAS \| Z1 \| ZSpeed

02-22-2017, 09:16 AM	#4 (permalink)
Silverstone Base Member Join Date: May 2015 Location: MN Posts: 120 Drives: 2010 Nismo #0507 Rep Power: 32	I had my thinking backwards. Burnt filament = infinite resistance. Silly me. Not sure how this would pop a BCM. __________________ 2010 Nissan 370Z NISMO #0507 ARC \| ARK \| Defi A1 \| HKS \| JL Audio \| Motul \| Pioneer \| Setrab \| South Bend Clutch \| TheRetrofitSource \| Tommy Kaira \| Toyo \| Wicked CAS \| Z1 \| ZSpeed

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