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Old 06-30-2021, 04:26 PM   #1
Spudsmaro
 
Drives: 2021 LT1 6 SPEED MANUAL CAMARO
Join Date: Jul 2019
Location: MD
Posts: 102
rear daytime running light out

my rear day time running light or fog light are out only on my passenger side tail light the break lights and reverse lights still work i have changed the bulbs twice and they haven't came back on, been looking at the fuse boxes and the diagrams and for some reason GM could not just simply put "rear drl" or like "taillights" they had to put everything is tech language lol so I'm asking today does anyone know which fuse is for my rear tail lights specifically the right one and the daytime running light you know the little red strip that's lit while you cruise at night so people can see you lol.....thank you
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Old 06-30-2021, 05:00 PM   #2
arpad_m


 
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Fuse F28 in the engine compartment block (named "Body control module 3") is the only one associated with passenger side rear lighting functionality, try that one.

This fuse controls the side marker lights, too, so if those are lit on the passenger side and only the tailllight segments aren't coming on, then the most likely culprit is unfortunately the taillamp assembly.
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2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq

Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods
JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune

1100 - 1/30/18 | 2000 - 1/31/18
3000 - 2/06/18 TPW 2/26/18
3400 - 2/19/18 | 3800 - 2/26/18
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4200 - 3/05/18 | 4800 - 3/14/18
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Old 06-30-2021, 07:14 PM   #3
Spudsmaro
 
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Quote:
Originally Posted by arpad_m View Post
Fuse F28 in the engine compartment block (named "Body control module 3") is the only one associated with passenger side rear lighting functionality, try that one.

This fuse controls the side marker lights, too, so if those are lit on the passenger side and only the taillight segments aren't coming on, then the most likely culprit is unfortunately the taillamp assembly.
Thank you, I changed the 15 amp fuse and it did not fix the issue, actually right before I walked into advanced auto I checked all my lights cause I notice my left blinker blinking really fast so I figured the left blinker was out turns out it was the rear one, so I got one of those bulbs but everything else worked fine after i changed the bulb and started the car my left head light bulb is now out, i just recently changed that bulb as well. So due to my strokes of bad luck i will be dropping her off at the dealer.
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Old 07-01-2021, 01:15 PM   #4
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Quote:
Originally Posted by Spudsmaro View Post
Thank you, I changed the 15 amp fuse and it did not fix the issue, actually right before I walked into advanced auto I checked all my lights cause I notice my left blinker blinking really fast so I figured the left blinker was out turns out it was the rear one, so I got one of those bulbs but everything else worked fine after i changed the bulb and started the car my left head light bulb is now out, i just recently changed that bulb as well. So due to my strokes of bad luck i will be dropping her off at the dealer.
I still need help I ended up changing all my body control module fuses numbered 1-8 I changed all 8 various different fuses from 10 15 to 30 amp fuses.

Still no passenger side daytime running light so it can’t be one of these fuses also the rear side marker on passenger side is out as well which leads me to believe it is still a bad fuse…but which fuse? Took her to Chevy today they said they won’t have available appointment untill next Friday so forget that I’ll have 2 tickets by then lol. At this point I’m lost because if it was the wiring harness for the rear daytime running bulbs then the side marker would be back on due to change of potentially blown fuse, however both are still out so could it be a bad ground? Someone please help.
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Old 07-01-2021, 06:07 PM   #5
arpad_m


 
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Here are the complete diagrams from the service manual associated with the taillight assemblies (except for the backup and the separate EU/Asia rear fog lamps), this will help you troubleshoot the harnesses and fuses involved.

T4F is the RPO for the uplevel lighting (HID+LED on the SS and LT w/convenience package), T90 is the EU/Asia specific rear lighting option code. A minus symbol before these option codes means the signal path is only present on cars without the option, and no preamble codes denote signal paths on cars with the option.
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__________________
2018 Camaro 2SS — G7E MX0 NPP F55 IO6
735 rwhp | 665 rwtq

Magnuson TVS 2300 80mm pulley | Kooks 1 7/8" LT headers | JRE smooth idle terminator cam | LT4 FS & injectors | TSP forged pistons & rods
JMS PowerMAX | DSX flex fuel kit | Roto-Fab CAI | Soler 95mm LT5 TB | 1LE wheels | 1LE brakes | BMR rear cradle lockout | JRE custom tune

1100 - 1/30/18 | 2000 - 1/31/18
3000 - 2/06/18 TPW 2/26/18
3400 - 2/19/18 | 3800 - 2/26/18
4300 - 2/27/18 | 4B00 - 3/01/18
4200 - 3/05/18 | 4800 - 3/14/18
5000 - 3/16/18 | 6000 - 3/19/18
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Old 07-01-2021, 07:22 PM   #6
Spudsmaro
 
Drives: 2021 LT1 6 SPEED MANUAL CAMARO
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Quote:
Originally Posted by arpad_m View Post
Here are the complete diagrams from the service manual associated with the taillight assemblies (except for the backup and the separate EU/Asia rear fog lamps), this will help you troubleshoot the harnesses and fuses involved.

T4F is the RPO for the uplevel lighting (HID+LED on the SS and LT w/convenience package), T90 is the EU/Asia specific rear lighting option code. A minus symbol before these option codes means the signal path is only present on cars without the option, and no preamble codes denote signal paths on cars with the option.
Thank you very much sir, i have changed all of the fuses with brand new ones even twice on the one specific for the right side, however no luck so im pretty sure it is a bad ground somewhere well now time to locate the ground and see if the wire is cut or if it needs to be cleaned or wutever forreal, its a headache but i will figure it out. thank you again
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