"Check left rear turn signal lamp" - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Rob_H · 08-20-2015, 02:29 AM

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snymat68 · 08-20-2015, 09:36 AM

The reason the car alerts you that a bulb is out and causes it to blink faster is because the driver chips that power the bulbs have feedback circuits in them. If they do not see the required resistance (of an intact filament in a regular, incandescent bulb) it will signal that the bulb is out. This check is only performed by the BCM (Body Control Module) in the car while a turn signal is activated, not when the hazards or brakes are applied. It checks once per (turn signal) blink.

The reason you need load resistors if you are running LED lights is because, by nature, LED's have a much higher resistance than a regular bulb (they draw less current). The load resistor (one per bulb) is wired in parallel with the bulb to provide the extra resistance that the BCM is expecting to see. This tricks the BCM into thinking a regular bulb is attached and working. The load resistor just converts the power 100% into heat, instead of heat and light, like a bulb would.

If you have LED lights, and load resistors, and you're still getting the bulb-out message when your turn signals are active, then you have one of the following issues:

1. Your load resistor(s) are the wrong resistance (should be 6 ohms to mimic a tail light bulb. 50 watt resistors are large enough to safely dissipate all the heat.).
2. You don't have enough load resistors. (should have one 6ohm resistor per tail light bulb, i.e. 4 total)
3. You have a faulty load resistor.
4. You have a poor connection.

Good luck and I hope you get it figured out.

On a side note...
Be aware that the load resistors will get as hot as the bulbs would. For this reason, you should mount them away from any plastic. Ideally they would be mounted flat against the steel body or frame of the car, to help dissipate the heat. If you're sitting at a red light with your foot on the brake for 5 minutes, those resistors are pumping out tons of heat.

FASTDIESEL · 08-20-2015, 08:41 PM

Mine did that, and had a loose bulb. The wire to the bulb is short and the angle you have to put the bulb in the housing is weird, so the bulb would get cocked when reinstalling. This occurred right after the body shop repainted the rear bumper (scuffs). With a little install patience, it hasn't been an issue since.

snymat68 · 08-22-2015, 11:01 PM

Should be back by the bulbs. Take the triangular covers off on either side of the trunk opening.

Sent from my DROID RAZR HD using Tapatalk

kmarshall2121 · 09-01-2015, 03:52 PM

just replace the bulb. the bulbs have numerous filaments in them, one of which is the brake light. if any of the filaments burns out, you get an error, and a fast interior blink that you are speaking of.

Rock-It Man · 09-13-2015, 02:18 PM

Is this factory wiring?

There's a funky looking solder sleeve in the lower photo. It seems fried on the end with the black wire coming out.

snymat68 · 09-18-2015, 08:49 AM

Again, you need one 6 ohm, 50 watt load resistor wired in parallel with every LED bulb.
4 LED tail light bulbs = 4 load resistors.
That's all there is to it.

08-20-2015, 02:29 AM	#1
Rob_H Drives: 2014 Chevrolet Camaro LT RS Join Date: Mar 2015 Location: Sutton Coldfield Posts: 27	"Check left rear turn signal lamp" * Last edited by Rob_H; 04-11-2016 at 01:02 AM.

08-20-2015, 09:36 AM	#2
snymat68 Drives: 2013 Blue Ray 1LS M6 Join Date: Apr 2013 Location: Pittsburgh, PA Posts: 1,227 View My Garage	The reason the car alerts you that a bulb is out and causes it to blink faster is because the driver chips that power the bulbs have feedback circuits in them. If they do not see the required resistance (of an intact filament in a regular, incandescent bulb) it will signal that the bulb is out. This check is only performed by the BCM (Body Control Module) in the car while a turn signal is activated, not when the hazards or brakes are applied. It checks once per (turn signal) blink. The reason you need load resistors if you are running LED lights is because, by nature, LED's have a much higher resistance than a regular bulb (they draw less current). The load resistor (one per bulb) is wired in parallel with the bulb to provide the extra resistance that the BCM is expecting to see. This tricks the BCM into thinking a regular bulb is attached and working. The load resistor just converts the power 100% into heat, instead of heat and light, like a bulb would. If you have LED lights, and load resistors, and you're still getting the bulb-out message when your turn signals are active, then you have one of the following issues: 1. Your load resistor(s) are the wrong resistance (should be 6 ohms to mimic a tail light bulb. 50 watt resistors are large enough to safely dissipate all the heat.). 2. You don't have enough load resistors. (should have one 6ohm resistor per tail light bulb, i.e. 4 total) 3. You have a faulty load resistor. 4. You have a poor connection. Good luck and I hope you get it figured out. On a side note... Be aware that the load resistors will get as hot as the bulbs would. For this reason, you should mount them away from any plastic. Ideally they would be mounted flat against the steel body or frame of the car, to help dissipate the heat. If you're sitting at a red light with your foot on the brake for 5 minutes, those resistors are pumping out tons of heat. __________________ Performance Mods Elite Catch Can \| CAI Intake with Scoop & Washer Bottle Relocation \| MRT v2 Axle-Back Exhaust \| MagnaFlow Resonated X-Pipe \| Resonator Delete \| Vmax Ported Throttle Body \| GM Strut Tower Brace \| JDP Tow Hook \| Vitesse Throttle Controller Aesthetic Mods Chrome Peek-A-Boo Door Handles \| Interior Accessories Kit \| OEM RS HIDs w/ 6000k Bulbs & 5000k LED Fogs \| Tail Light, Marker Light, & Turn Signal Tint \| Tru-Sequence Sequential Turn Signals & Brake Lights \| Silver Fade Gill Stripes \| Carbon Fiber Bowties \| Various Chrome/Painted/Carbon Fiber Items

08-20-2015, 08:41 PM	#3
FASTDIESEL Drives: 2010 2SS/RS L99 SLP Cosmetics Join Date: Sep 2014 Location: West Tennessee Posts: 382 View My Garage	Mine did that, and had a loose bulb. The wire to the bulb is short and the angle you have to put the bulb in the housing is weird, so the bulb would get cocked when reinstalling. This occurred right after the body shop repainted the rear bumper (scuffs). With a little install patience, it hasn't been an issue since. __________________ 13.244 @ 104.91 100% stock (#17). Now - Mike Norris catch can. 245/50/19 Firestone Wingfoot A/S on LT2 black powder coated rims (square). 1 7/8" Speed-Engineering LTH, off road pipes, tune. Now 12.93 @ 109.13.

08-22-2015, 11:01 PM	#4
snymat68 Drives: 2013 Blue Ray 1LS M6 Join Date: Apr 2013 Location: Pittsburgh, PA Posts: 1,227 View My Garage	Should be back by the bulbs. Take the triangular covers off on either side of the trunk opening. Sent from my DROID RAZR HD using Tapatalk __________________ Performance Mods Elite Catch Can \| CAI Intake with Scoop & Washer Bottle Relocation \| MRT v2 Axle-Back Exhaust \| MagnaFlow Resonated X-Pipe \| Resonator Delete \| Vmax Ported Throttle Body \| GM Strut Tower Brace \| JDP Tow Hook \| Vitesse Throttle Controller Aesthetic Mods Chrome Peek-A-Boo Door Handles \| Interior Accessories Kit \| OEM RS HIDs w/ 6000k Bulbs & 5000k LED Fogs \| Tail Light, Marker Light, & Turn Signal Tint \| Tru-Sequence Sequential Turn Signals & Brake Lights \| Silver Fade Gill Stripes \| Carbon Fiber Bowties \| Various Chrome/Painted/Carbon Fiber Items

09-18-2015, 08:49 AM	#7
snymat68 Drives: 2013 Blue Ray 1LS M6 Join Date: Apr 2013 Location: Pittsburgh, PA Posts: 1,227 View My Garage	Again, you need one 6 ohm, 50 watt load resistor wired in parallel with every LED bulb. 4 LED tail light bulbs = 4 load resistors. That's all there is to it. __________________ Performance Mods Elite Catch Can \| CAI Intake with Scoop & Washer Bottle Relocation \| MRT v2 Axle-Back Exhaust \| MagnaFlow Resonated X-Pipe \| Resonator Delete \| Vmax Ported Throttle Body \| GM Strut Tower Brace \| JDP Tow Hook \| Vitesse Throttle Controller Aesthetic Mods Chrome Peek-A-Boo Door Handles \| Interior Accessories Kit \| OEM RS HIDs w/ 6000k Bulbs & 5000k LED Fogs \| Tail Light, Marker Light, & Turn Signal Tint \| Tru-Sequence Sequential Turn Signals & Brake Lights \| Silver Fade Gill Stripes \| Carbon Fiber Bowties \| Various Chrome/Painted/Carbon Fiber Items

09-01-2015, 03:52 PM	#5
kmarshall2121 Drives: 2012 45th Anniversary Edition Join Date: Aug 2012 Location: San Diego, CA Posts: 1,618 View My Garage	just replace the bulb. the bulbs have numerous filaments in them, one of which is the brake light. if any of the filaments burns out, you get an error, and a fast interior blink that you are speaking of.

09-13-2015, 02:18 PM	#6
Rock-It Man 376 cubic inches of fun Drives: 2023 Camaro ZL1 A10 Join Date: Jul 2010 Location: MA Posts: 4,033 View My Garage	Is this factory wiring? There's a funky looking solder sleeve in the lower photo. It seems fried on the end with the black wire coming out.