Tail Fuse keeps blowing - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

turbowhistle · 10-14-2022, 11:43 PM

My taillight DRL and plate light randomly stopped working. The 10a Fuse (#4 TAIL) keeps blowing. The brake lights and turn signals still work. I've tried unplugging the tail lights,4th brake, plate lights, and headlights but the fuse is still blowing. The DRL works for a split second and then the fuse pops. I checked for any damaged wiring or loose grounds in the trunk area but I cant find anything. I'm having a hard time finding the short and was wondering if you guys experienced the same or can point me in a better direction.

I was also wondering if I can bypass the #4 Tail fuse by splicing the DRL wire to some other constant 12v wire so that I can at least be able to drive the car at night.

Any help is appreciated!

I have Valenti 60-1412 tail lights with the matching 4th brake light.
Side note I don't have the front side markers plugged in, not sure if that's tied to Fuse #4

The Red One · 10-15-2022, 08:21 AM

Cant help you much,will leave some others reply,
but here is some good reading to help you troubleshoot.

https://www.ft86club.com/files/BRZwiringi.pdf

soundman98 · 10-15-2022, 03:42 PM

If you've unplugged all the light housing harnesses that are controlled by that fuse, that would mean there's a shorted wire somewhere else in the vehicle. I would start wherever mods were added, something likely got pinched.

turbowhistle · 10-16-2022, 03:05 AM

That seems to be it. Do you think it would be possible to directly wire the drl to something like the turn signal, bypassing the fuse#4?

soundman98 · 10-16-2022, 10:21 AM

i wouldn't bypass any fuse. the fuse blowing is telling you something is seriously wrong.

x808drifter · 10-16-2022, 10:31 AM

Quote:

Originally Posted by soundman98

i wouldn't bypass any fuse. the fuse blowing is telling you something is seriously wrong.

Fk it.
Car fire for warmth.

soundman98 · 10-16-2022, 10:39 AM

just stick a wire in the fuse and let it burn.

10-14-2022, 11:43 PM	#1
turbowhistle Junior Member Join Date: Oct 2022 Drives: 2013 Scion FR-S Location: USA Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Tail Fuse keeps blowing My taillight DRL and plate light randomly stopped working. The 10a Fuse (#4 TAIL) keeps blowing. The brake lights and turn signals still work. I've tried unplugging the tail lights,4th brake, plate lights, and headlights but the fuse is still blowing. The DRL works for a split second and then the fuse pops. I checked for any damaged wiring or loose grounds in the trunk area but I cant find anything. I'm having a hard time finding the short and was wondering if you guys experienced the same or can point me in a better direction. I was also wondering if I can bypass the #4 Tail fuse by splicing the DRL wire to some other constant 12v wire so that I can at least be able to drive the car at night. Any help is appreciated! I have Valenti 60-1412 tail lights with the matching 4th brake light. Side note I don't have the front side markers plugged in, not sure if that's tied to Fuse #4

10-15-2022, 03:42 PM	#3
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,673 Times in 6,781 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	If you've unplugged all the light housing harnesses that are controlled by that fuse, that would mean there's a shorted wire somewhere else in the vehicle. I would start wherever mods were added, something likely got pinched. __________________ "The time you enjoy wasting is not wasted time"

10-16-2022, 10:21 AM	#5
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,673 Times in 6,781 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	i wouldn't bypass any fuse. the fuse blowing is telling you something is seriously wrong. __________________ "The time you enjoy wasting is not wasted time"

10-16-2022, 10:39 AM	#7
soundman98 ProCrastinationConsultant Join Date: Sep 2013 Drives: '14 Ranger, '18 Tacoma 4Dr LB Location: chicago-ish Posts: 11,330 Thanks: 35,240 Thanked 13,673 Times in 6,781 Posts Mentioned: 98 Post(s) Tagged: 0 Thread(s)	just stick a wire in the fuse and let it burn. __________________ "The time you enjoy wasting is not wasted time"

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10-15-2022, 08:21 AM	#2
The Red One Planning summer road trip Join Date: Jun 2019 Drives: 2019 Sport-tech RS. City car: GD3 Location: Mtl south shore Posts: 667 Thanks: 899 Thanked 892 Times in 462 Posts Mentioned: 3 Post(s) Tagged: 0 Thread(s)	Cant help you much,will leave some others reply, but here is some good reading to help you troubleshoot. https://www.ft86club.com/files/BRZwiringi.pdf

10-16-2022, 03:05 AM	#4
turbowhistle Junior Member Join Date: Oct 2022 Drives: 2013 Scion FR-S Location: USA Posts: 2 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	That seems to be it. Do you think it would be possible to directly wire the drl to something like the turn signal, bypassing the fuse#4?

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