Fried BCM ? fuse ? something ? - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

eddieflyinv · 04-18-2015, 08:57 AM

Well that's what I'm counting on I guess :/ I know I've come across some related issues in other threads as well, I'll just be sure to include lots of details in this thread with the pretty straightforward title lol

ls1ac · 04-18-2015, 11:21 AM

Just for the sake of giggles, did you disconnect the battery for ten minutes and then reconnect. With pure dumb luck sometimes things will reset.

blown · 04-18-2015, 03:05 PM

Quote:

Originally Posted by ls1ac

Just for the sake of giggles, did you disconnect the battery for ten minutes and then reconnect. With pure dumb luck sometimes things will reset.

they wont work.. it'll come on once the car switches on and will not turn off until you pull the battery..

eddieflyinv · 04-19-2015, 05:50 PM

Quote:

Originally Posted by ls1ac

Just for the sake of giggles, did you disconnect the battery for ten minutes and then reconnect. With pure dumb luck sometimes things will reset.

Aha nah .. it was disconnected for an entire day or 2 and didn't change anything :p not that lucky, I'll update the thread Thursday when I find out what's up

blown · 04-22-2015, 12:14 AM

junction block did nothing.. going to try the gauge cluster.

steve99 · 04-22-2015, 06:18 AM

Quote:

Originally Posted by blown

junction block did nothing.. going to try the gauge cluster.

just be aware that you cannot just swap the dash cluster, as its part of a secutity set with the ecu and imobiliser modules. you either swap all three as a set ot you will need to get dealer to recode the new dash cluster to work with the ecu\imobiliser.

blown · 04-22-2015, 05:25 PM

Quote:

Originally Posted by steve99

just be aware that you cannot just swap the dash cluster, as its part of a secutity set with the ecu and imobiliser modules. you either swap all three as a set ot you will need to get dealer to recode the new dash cluster to work with the ecu\imobiliser.

yeah, we're not trying to start the car , just verify that it fixes the issue of the light staying on.. if it does fix it I will be ordering another cluster to have my local tuner program the keys to it..

steve99 · 04-22-2015, 06:57 PM

Quote:

Originally Posted by blown

yeah, we're not trying to start the car , just verify that it fixes the issue of the light staying on.. if it does fix it I will be ordering another cluster to have my local tuner program the keys to it..

i dont think any tuners can do the security coding for security set modules, its generally dealer only and closly guarded, as it stops you stealing cars by swaping in an imobiliser and key set.

blown · 04-23-2015, 12:15 AM

wasn't the gauge cluster either, so now we're looking at wiring issue somewhere.

Boostedpro · 04-23-2015, 03:48 PM

I would try replaceing the dimmer switch relay. According to the wiring diagrams it ties into the high beams and interior lighting which is also tied into the exterior lights. It should be in the underhood fuse block labeled as "dim relay". I think the relay took a power hit and getting stuck in the closed position which is making the car think the lights are on.

blown · 04-29-2015, 04:28 PM

Not dim relay

blown · 05-02-2015, 03:28 PM

not biu/relay/gauge cluster/junction block.

stumped but they are back probing all the pins on the biu to verify what is back feeding to the biu to make it think the lights are on.

eddieflyinv · 05-02-2015, 08:28 PM

Hey guys, trip to the dealer cost me $750.. there was a broken ground somewhere in behind the bcm, the short never made it that far and I guess after they fixed the ground the hazard fuse blew, and I'm not sure if it was before or after the fix, but my headlights were both toast too, got so hot they melted lol
So it wasn't the BCM, just a broken ground and the short... Took them 5 hours in Labour to figure out, and then the cost of the headlights and a fuse and yeah... I'll never touch electrical again.

Chaetagnath · 05-03-2015, 11:37 AM

Quote:

Originally Posted by eddieflyinv

Hey guys, trip to the dealer cost me $750.. there was a broken ground somewhere in behind the bcm, the short never made it that far and I guess after they fixed the ground the hazard fuse blew, and I'm not sure if it was before or after the fix, but my headlights were both toast too, got so hot they melted lol
So it wasn't the BCM, just a broken ground and the short... Took them 5 hours in Labour to figure out, and then the cost of the headlights and a fuse and yeah... I'll never touch electrical again.

Wow, that was a tough one. Thanks for sharing your saga, may help someone in the future. Did they tell you exactly which ground point was broken?

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04-18-2015, 08:57 AM	#15
eddieflyinv Senior Member Join Date: Jul 2014 Drives: 2013 Scion FR-S Location: Ireland Posts: 225 Thanks: 133 Thanked 57 Times in 43 Posts Mentioned: 6 Post(s) Tagged: 2 Thread(s)	Well that's what I'm counting on I guess :/ I know I've come across some related issues in other threads as well, I'll just be sure to include lots of details in this thread with the pretty straightforward title lol

04-22-2015, 12:14 AM	#19
blown Senior Member Join Date: Sep 2014 Drives: ft86 Location: ft86 Posts: 232 Thanks: 3 Thanked 25 Times in 21 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	junction block did nothing.. going to try the gauge cluster.

04-23-2015, 12:15 AM	#23
blown Senior Member Join Date: Sep 2014 Drives: ft86 Location: ft86 Posts: 232 Thanks: 3 Thanked 25 Times in 21 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	wasn't the gauge cluster either, so now we're looking at wiring issue somewhere.

04-23-2015, 03:48 PM	#24
Boostedpro Senior Member Join Date: Jan 2013 Drives: 2013 FR-S Location: CNJ Posts: 106 Thanks: 20 Thanked 9 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I would try replaceing the dimmer switch relay. According to the wiring diagrams it ties into the high beams and interior lighting which is also tied into the exterior lights. It should be in the underhood fuse block labeled as "dim relay". I think the relay took a power hit and getting stuck in the closed position which is making the car think the lights are on.

04-29-2015, 04:28 PM	#25
blown Senior Member Join Date: Sep 2014 Drives: ft86 Location: ft86 Posts: 232 Thanks: 3 Thanked 25 Times in 21 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	Not dim relay

05-02-2015, 03:28 PM	#26
blown Senior Member Join Date: Sep 2014 Drives: ft86 Location: ft86 Posts: 232 Thanks: 3 Thanked 25 Times in 21 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	not biu/relay/gauge cluster/junction block. stumped but they are back probing all the pins on the biu to verify what is back feeding to the biu to make it think the lights are on.

05-02-2015, 08:28 PM	#27
eddieflyinv Senior Member Join Date: Jul 2014 Drives: 2013 Scion FR-S Location: Ireland Posts: 225 Thanks: 133 Thanked 57 Times in 43 Posts Mentioned: 6 Post(s) Tagged: 2 Thread(s)	Hey guys, trip to the dealer cost me $750.. there was a broken ground somewhere in behind the bcm, the short never made it that far and I guess after they fixed the ground the hazard fuse blew, and I'm not sure if it was before or after the fix, but my headlights were both toast too, got so hot they melted lol So it wasn't the BCM, just a broken ground and the short... Took them 5 hours in Labour to figure out, and then the cost of the headlights and a fuse and yeah... I'll never touch electrical again.

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