Trailer Left Turn Signal/left brake light not working

[Derwud]

Originally Posted by loufish

you're making me laugh...Thanks!
I'll "fix" it one more time...

Once again Done!

Hey better to hear it from me..

[young dank]

ha loufish makes me laugh, just tell me which gets the power first from the battery? the relay or the BCM?

[loufish]

ha loufish makes me laugh, just tell me which gets the power first from the battery? the relay or the BCM?

Well at the very least, everybodys laughing...

The BCM has a fuse (#59 10 amp, ign hot) and a link(Link "F" 50 amp) feeding it...There's still no relay for turn/brake trailer lights...

More to come...

[loufish]

Apoliges all around, I just checked a 2007 Titan and there ARE 2 Relays for turn/brake trailer lights...

I had been checking my own 2004 Titan...I'm not sure what year they(Nissan) changed, but they did...

So that make's me only half wrong...or half right whichever way you want to go...
Here's the Exterior lights diagrams for 2007:

[young dank]

you not wrong loufish, that guy who's askin for help has a 2005. they went to two relays in 2006. thats because so much towing problems with trailer lights. they need to separate THE POWER FROM THE TURN/BRAKE lights cause it kept blowin light bulbs. 12 volt relays.

[loufish]

you not wrong loufish, that guy who's askin for help has a 2005. they went to two relays in 2006. thats because so much towing problems with trailer lights. they need to separate THE POWER FROM THE TURN/BRAKE lights cause it kept blowin light bulbs. 12 volt relays.

Cool, now I know what year they changed over. You can see how the 04' design could have issues, if the turn/brake circut gets grounded there's no circut protection for the BCM...
Thanks...

[mytitan]

well i took my truck to hb nissan and they said they would warranty my bcm. i just saved $600. i hate costa mesa nissan(these guys are crooks). ive been very happy w/ hb nissan since i normally take my veh's there for service. hopefully this will solve my issues.

[Derwud]

Originally Posted by loufish

Negitive....The BCM is responsible for the trailer connectors L/R turn AND Brake signals.

Relays are for the running lights and 12V to the connector.
See enclosed wiring diagram...Circuts #51 & #52 come straight out of the BCM and go straight to the Trailer Connector...

Lou,

You have the second page of this diagram?

[hewill]

Thanks for your info on the two fuses under the dash. I was tearing my hair out. Now I'm going to have a beer!!!!!!!!!!!

[young dank]

I wanna take this time to say Loufish is a genius. If I need any questions he will be the first I ask

[loufish]

Lou,

You have the second page of this diagram?

I'm sorry, I lost track of what year you need...Let me know, I'll get you both for that year.
Here's a 2006..

Looks like the trailer turn signal relays were added in 2007, and the turn fuse's with the BCM tow harness recall.

[young dank]

Originally Posted by loufish

I'm sorry, I lost track of what year you need...Let me know, I'll get you both for that year.
Here's a 2006..

Looks like the trailer turn signal relays were added in 2007, and the turn fuse's with the BCM tow harness recall.

no it was added in 2006, its on my truck, the recall was done on 04-05 models with the some 06's.

[Derwud]

Originally Posted by loufish

I'm sorry, I lost track of what year you need...Let me know, I'll get you both for that year.
Here's a 2006..

Looks like the trailer turn signal relays were added in 2007, and the turn fuse's with the BCM tow harness recall.

I was looking for both pages of the 04 diagram..

[loufish]

no it was added in 2006, its on my truck, the recall was done on 04-05 models with the some 06's.

Thanks...
Here's the 04' diagrams with the Recall added fuses...

[mytitan]

just got back from the dealer who replaced my bcm because lt turn signal and lt brake would not brake. i was over my warranty just by 3 weeks and hb nissan replaced it when costa mesa nissan wouldnt. i hate them. bought the truck there but had a bad experience from service from prior jobs. i will never take my truck or buy from them again. ive been going to hb nissan for a couple of years now and no problems up to date. yes my lt's work now and i save $600.