Blown relay perhaps? Try swapping relays with your buddy and see if that does the same thing.

Andrew

 

I would check the plug on the truck to see if a wire has been pulled out. Get a test light, and google search for the standard wiring setup for the RV plug and test the pins to see if they are doing their job at the plug. The other thing you can try is a relay swap up in the fusebox bin under the hood. Swap the left and right and see if the problem moves. If the problem moves, buy a new relay. I would actually try the relay swap first, unless you have reason to suspect the plug area of the truck for some reason.

Wally

 

Check for a blown fuse first, if blown fuse check your trailer connectors and trailer wiring...

Prodigy has nothing to do with the brake lights...

Has your truck had the BCM harness recall?

 

I agree...its not a controller issue. Ipulled the controller out, hooked the trailer up, and brake/blinker issue still exists. At least I fixed my trailer brakes by reconnecting the harness to the Prodigy.

I was under the hood this morning (scary thing for me to be under there).

I pulled the cover off the relay box and the fuse box. I checked any fuse that said "Tow" and they all look ok.

The relays are the squarish ones in the smaller box, right? Any trick to get them out? I pulled, and it wouldn't pop out, and I didn't want to break anything. I noticed that there was a trailer tow 1 and a trailer tow 2.

I have examined the 7 pin plug, and it all looks tight.

My truck has had the BCM recall performed at the dealer.

 

The tail lamps are controlled by trailer tow relay 1 (located in the Fuse and Relay Box.) Power is supplied to the tail lamp relay and a 10A fuse. The fuses and relay are located in the IPDM E/R (intelligent power distribution module engine room) which is just behind the relay box with the tow relays (next to the firewall.) The fuse is No. 36.

I would think you'd lose both tail lights if it were a fuse, since they follow the same circuit (in regards to just the tail lamps.) Now if it's just the turn signal and hazard (have you checked the hazards) then that it is controlled by the BCM and is seperate for left and right. Left is through BCM terminal 52, and power is supplied to trailer connector terminal 1 (your plug should have a schematic.) There is no fuse between the BCM and trailer, so nothing really you can check. BTW, the wire should be Green with a Black stripe.

Brake lamp power is supplied through a seperate terminal, based off of tge actual pedal.

So it's a bit confusing that both your left turn signal and brake light are not working. I could maybe see just the signal not working, but the left brake should work if the right does. Have you checked this with the running lights off (headlights completely off?)

Also, had you checked your lights following the BCM TSB? All this info is based on the '05 Titan prior to the fix, I have no idea what they might have done since then. Perhaps they messed up something during the fix.

 

BTW: Here's the BCM service campaign: http://www.nissanhelp.com/Ownership/Bulletins/Nissan/2005/NTB05-086.htm

 

http://www.titantalk.com/forums/titan-towing-hauling/38155-bcm-module-sub-harness-info.html?highlight=BCM+fuse+trailer

 

http://www.titantalk.com/forums/titan-towing-hauling/38155-bcm-module-sub-harness-info.html?highlight=BCM+fuse+trailer

Ah Ha! I knew it had to be something with that additional harness. From looking over the OE schematics there was no way for this to happen. Damn, and I tried to search for something like this. BAC you remain the search king.

 

Thank you, you beat me to it...

Now, you need to figure out why those fuse(s) blew!

 

Relays always look okay unless the have been catastrophically damaged. You have to test them to be sure they are working.

Pull the LH one and plug it into the RH plug and see if the problem goes to the other side of your trailer.

Wally

 

I'll go looking for those new fuses right after I get home from work tomorrow!

I'll let you know what I find.

Thank you everyone for all the great insight! Titan Talk is the BEST!

 

I couldn't wait until tomorrow...I took a flash light and went looking for those fuses, and of course, could not find them.

Can anyone give me some guidance as to where I might locate the new fuses (as referred to in bestachess reply)?

Do I need to pull dash panels off? I was looking above the throttle, and could see any fuses.

Thanks!

 

Can anyone give me some guidance as to where I might locate the new fuses (as referred to in bestachess reply)?

Read the link I provided to the TSB. It shows pictures of where they are installed.

 

After I had the BCM harness done, I noticed that the turn signal seems to blink with a different sound/rate. I haven't hooked up any trailer yet, but my turn signals still work. I actually tested them right after I got it back from the dealer, because I thought that the different sound/rate might indicate something was amiss.

 

I'm looking to revive this post...

Has anyone resolved the issue? Had wiring in trailer replaced and stopped blowing fuses?

 

I have had several erratic lights not working issues, and each and every stinking time it comes back to a bad connesction between the trailer's pigtail and the Titan's trailer plug. Sometimes it has been the Nissan male socket and others the trailer's female plug. I now just make a habit of cleaning them both with a quick spritz of brake cleaner and a wire brush for the male and a pocket knife scrape on the female.

With luck something that simple will tturn out to be your problem, I know in my case, each and every time it boiled down to a dirty connection.

 

Derwud said, "Check for a blown fuse first, if blown fuse check your trailer connectors and trailer wiring...

Prodigy has nothing to do with the brake lights...

Has your truck had the BCM harness recall?"

I hooked up an older trailer and the lights worked for a few minutes and then stopped. The left side flasher would not work on the trailer or truck. I can't rem. for sure but I think the brake was not working also. I went to the dealer and they replaced the fuse in the BCM harness. This took about 30 seconds to do. I said, "How did you do that?" The service guy had me crawl under the dash and he showed me the fuses. They are directly above the gas pedal under the dash on my 05 XE. I think they added these fuses so that an incorrectly wired trailer would not burn up something important.

 

I've replaced the fuse several times, and it continues to blown the next time I trailer.

I trailered for a full season without issue before having the BCM work done, so I don't think there is any problem with the connectors.

 

I've replaced the fuse several times, and it continues to blown the next time I trailer.

I trailered for a full season without issue before having the BCM work done, so I don't think there is any problem with the connectors.

Also, the left side brake and blinker will work (temporarily) after changing the fuse, but will blow during the next time out...something that leads me to believe its not trailer connectors.

 

I just found out i have the same problem with my 06 titan, only mine is with the right side stop and blinker on my trailer. I replaced the taillights on my trailer with led's and still have the same problem, thought it would of fixed it. Well good thing i looked in here, i'm gonna have to check and see if i have a blown fuse then. I hope that is all that is wrong with it. I have a camping trip next weekend.

 

Keep us posted as to what you find with the fuses.

It will be interesting to hear what you find...

 

My '05 LE CC has the same left blinker/light problem. BCM was fine on mine (no recall). I changed out light bulb and fixture. Wiggled all wires on trailer and it came on. It works only sometimes. No blown fuses anywhere. Something is not working properly?????????

 

Well, after going through this thread and all the links in here. I found out the my 06 cc only had 2 relays and not 3 how they are suppose to have. Once you take the cover for relays off it indicates 3 relays needed for tow, and the other 2 for Lh turn, and Rh turn. Went to the dealer and bought the second blue relay and all works fine. I did not see any fuses under the dash, so i hope that nothing burns out. Good for TITAN TALK FORUMS.:brownsmil

 

Just a note to say thanks to the group and report on my experience. I searched for info on non-functioning trailer light connectors and found what I needed here. This was the most informative thread for my use, so I'm posting here to revive it. Particular thanks to Sammy and Best. :cheers:

So, my symptoms: only the left turn output was working (tested at 4-way flat output of 7-to-4-way connector. BTW, no big tow pkg, but a Nissan hitch + connector)

What I found & did:
1. 30A fusible link in box by firewall on passenger side burned out -- replaced it. Result: no change.
2. 10A mini fuse under steering column burned out -- replaced it. Result: right turn now works. Still no running lights.
3. 10A mini fuse (in box with fusible link) burned out -- replaced it. Result: running lights now work.

I probably wouldn't have found the cleverly hidden fuses beside the steering column without help from this group!

So how did I blow three fuses? Seems like I would remember being struck by lightning...

So now my lights work again, and I know several places to go looking for fuses if/when they go out again.

 

Left brake / blinker update:

I took my "05 Titan in for its 30k service and spoke with a mechanic and service advisor about the problem. The mechanic indicated that the fuses were doing what needed to be done and there must be a problem with the trailer. One service advisor suggested trying a 15 amp fuse (normally a 10 in the BCM harness). I did this and trailered this weekend. All works fine now. No blown fuse. Hmmmmm...

Hopefully, I'm not doing anything to damage the BCM...