Benelli Forum banner

How to fry the wiring of your TNT in few seconds...

9.5K views 14 replies 6 participants last post by  tucandugu  
#1 ·
That is not for asking help but to advise TNT owners about a serious issue that I have experienced recently in my Sport EVO.

Two days after a long ride under heavy rain I took the bike for a day trip. It was a sunny day, quite warm, and the TNT was totally dry and worked fine. After about one hundred kilometers I stopped to check the road directions. When I started again, the engine ran for few seconds until stop. Tried several times and no way to start. I didn´t insisted too much. Checked the fuse box and detected the fans fuse burned. So, I replaced it and tried to start up again. Engine started but suddenly some smoke went out from the left side of the seat. Immediately I switched off the engine and took out the ignition key but surprisingly the dashboard continued connected, now showing the intermittent "BAT" signal. After some confusing seconds I pressed the "engine stop switch" in the right hand side of the handlebar, which fortunately not only prevents to restart the engine but also disconnects the whole electric system...

At that time, the 30 Amp main fuse was burned too...

I went directly to the area where the smoke appeared which was a wiring harness very close to the relay bay. Apparently nothing noticiable but in a later inspection, I could observe how the external cover of the harness was scorched.
Image


Once having accesibility to the harness, that was the state of the wiring...And some wires burned until the ignition key!.






But, what caused that disaster?. Well, at first sight all seem right, but once I disassembled the fuse and relays bay (really quite tricky to work), that was what I found inside...Still was water there after two weeks from the issue ...



Then I could see a rubber gasket from where the relay wires go out which is closing that area by the left side. Exactly the point where most of the water was accumulated.


Probably it moved from its place or was incorrectly mounted from factory, allowing water comming into the relays and fuse area. Once the water inside it can remain there for months since no drain plug is there...And that is impossible to check from the top, hidden by the relays and fuse box...

So, I suggest to check that point, or better yet, improve the sealing of the rubber gasket with silicone or sealing paste, if you do not want to experience that disaster.

Now slowly working on this, will post the improvements.

Carles.
 

Attachments

#3 ·
Yeah, terrible. No one could expect the fuses did not cover that. I was very lucky to stop by chance before that happened. I do not want to think about what could have happened if I kept going ...
Most damaged wiring is a secondary harness which leads to rear lights. Onwards there are "only" two wires overheated. So, initially I planned to restore the actual wiring, but if I could get a cheap one, may be I replace it.
Thanks.
 
#4 ·
Not good Carles

I was surfing Youtube yesterday and saw your video on this matter :doh:
I had the same experience but with the white connector-box on the right - it was soaked in water and did all sort of gremlins before I found it and secured it plus drilling a hole in the box for draining.
Will now look for the same on left-side - hope this getting fixed for you :D
 
#5 ·
I was surfing Youtube yesterday and saw your video on this matter :doh:
I had the same experience but with the white connector-box on the right - it was soaked in water and did all sort of gremlins before I found it and secured it plus drilling a hole in the box for draining.
Will now look for the same on left-side - hope this getting fixed for you :D
My white connector also had signs to have been exposed to the water so, being placed in the oposite side from the rubber gasket could indicate more than one weak point in the box, probably the cover...Yeah, thought about drilling some draining holes, too.
Having the bike disassembled I will take advantage for replacing the cam chain too, so I will take my time...Thanks Peer.
 
#9 ·
The wiring loom from tornado 900 will not fit as far as I know one of the reason ist the headlight control its different to the tnt and Tornado 1130. But a used wiring loom for tnt isn't so expensive and there should be a few on ebay if you want a new one Alex has <5 in stock if I remember correct.


Rear wiring (17 Euro)
http://www.maniac-parts.de/artikel.php?id=1368

Service wiring (110 Euro)
http://www.maniac-parts.de/artikel.php?id=1872

Injection wiring (158 Euro)
http://www.maniac-parts.de/artikel.php?id=862

Front wiring (30 Euro)
http://www.maniac-parts.de/artikel.php?id=1367

Prices incl. VAT + shipping

Its possible that he has used wiring looms in stock, too the should be cheaper but you have to ask him. Good luck.

Gesendet von meinem SM-P905 mit Tapatalk
 
#10 ·
The wiring loom from tornado 900 will not fit as far as I know one of the reason ist the headlight control its different to the tnt and Tornado 1130. But a used wiring loom for tnt isn't so expensive and there should be a few on ebay if you want a new one Alex has <5 in stock if I remember correct.


Rear wiring (17 Euro)
HINTERER VERKABELUNG, Benelli

Service wiring (110 Euro)
KABELBAUM TNT, Benelli

Injection wiring (158 Euro)
VERKABELUNG EINSPRITZDĂśSE, Benelli

Front wiring (30 Euro)
VORDERES VERKABELUNG, Benelli

Prices incl. VAT + shipping

Its possible that he has used wiring looms in stock, too the should be cheaper but you have to ask him. Good luck.

Gesendet von meinem SM-P905 mit Tapatalk

Great info StingerWolf. Will have a look. Thanks, sir.
 
#13 ·
What worries me now, is being able to diagnose a clear cause of all this. Although the most logical is the water in the section of the relays, I can´t be totally sure. The longest burned wire, -black and yellow colour- is affected from just under the seat (where there is the massive burn), untill the ignition key wiring connector...How to know exactly where the short started?. If someone has experienced a similar disaster or knows a way to diagnose those issues, it would be interesting to know his opinion. Thanks.
 
#15 ·
Well sirs, that's what I finally did with the help of a good friends team. Still to connect the wiring harness to the relay box, but happy with the work done.

[video=youtube_share;N1pSPHy23_M]https://youtu.be/N1pSPHy23_M[/video]