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Discussion Starter · #1 ·
Earths on the battery -
There are two black earth wires to the battery, one, the main earth DSCF1429.JPG from the starter motor and a second return that has 3 black wires going into the loom on the right hand side of the bike.
I have studied the wiring diagram ,but can not find where these wires go to. They appear to be in the main harness going up past the TPS and stepper motor.
There is a 4th black wire that appears from the main harness on the left hand side of the bike, it shares the common main earth on the starter and back to battery -
Anyone know where this has come from ?
The bike is an 1130 Tre K




DSCF1430.JPG
 

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Short answer .. I'm sure they come from the ECU , as it supplies a positive live feed to injectors and coils constantly then triggers the ground to energize them .
 

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Discussion Starter · #3 ·
Short answer .. I'm sure they come from the ECU , as it supplies a positive live feed to injectors and coils constantly then triggers the ground to energize them .
Can I come and have a look at yours, Tre K I mean. The wiring on this bike is a real mess, it was reframed by Moto Corsa it went seriously down hill after that.
Thought I had cured it, got it running ,then it took a back seat and shut up shop.
 

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Your more than welcome to come and see how mine is wired/setup .
These bikes are all the same but oh so unique at the same time .
 

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Discussion Starter · #5 ·
Your more than welcome to come and see how mine is wired/setup .
These bikes are all the same but oh so unique at the same time .
Well I am about 2 miles over the border , so in lockdown until December .
I have as said two, black leads to negative on the battery and a single black ground which returns to the starter motor main earth.
Positive side of battery a single positive main feed , that splits to a Y , one to the alternator and the other to the starter relay (30 amp fuse).
There is a single 2.5 mm feed to 20 amp fuse in the 6 rail fuse box, there is a 1.5 mm piggyback feed to a 5 amp fuse the other end of the fuse box. This is the constant feed to the clocks.
The starter relay plug has 2 2.5 mm feeds that go to 2 15 amp fuses in the fuse box, these are piggybacked to the other two 10 and 15 amp fuses.

I have a strange looped white connector and another 2 pin plug doing nothing to the right of the relay rail.

My problem is the bike is completely dead from the key. it was running , I turned it off, switched it on again later . Zilch.
its in neutral, side stand up , checked kill switch , sidestand switch, tip over switch, battery connections ,voltage 13.2 v static. DSCF1425.JPG DSCF1424.JPG DSCF1422.JPG DSCF1426.JPG
Have you got anything like this ?
 

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Hi Pete,
Have you checked the main fuse in the starter relay ? ..
It could be as simple as that .

I'm assuming you have connected the two ground wires to the battery , only saying as it had me once !.

Yes I've a few odd connectors under the fuse box too . One empty one and one linked to itself .
 

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Discussion Starter · #7 ·
Hi Pete,
Have you checked the main fuse in the starter relay ? ..
It could be as simple as that .

I'm assuming you have connected the two ground wires to the battery , only saying as it had me once !.

Yes I've a few odd connectors under the fuse box too . One empty one and one linked to itself .
First place I looked, no the main fuse and spare is good, I even bought a new relay in case it was faulty.
I do not really want to start baring out the entire loom to chase cables, I do not appear to have a a circuit through the electrics back to the battery.
That is why I need to chase these earth wires, I am going to check the ignition key switch , it is only an on/off switch, no alarm so it it is either on or off.
I can not believe it failed in switching the bike off on the key.
Battery direct to starter and bike spins over , but no relays, pump, ignition , even the lights dont work.
 

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Those earth wires your going to chase should connect to engine ground somewhere near the front sprocket cover .. at least that's where mine are , I forgot to re connect them one day after I adjusted my clutch .. I thought I'd killed my bike that day ..
 

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Discussion Starter · #10 ·
You don't have to. Just use a sharp needle to penetrate the insulation & connect to the copper. It will "heal" when you remove the needle.
Yes , thanks Errol, but I think the problem is going to be corrosion at wiring joints , like the Y junction on the positive from battery to alternator and starter relay. I think I will have to piggyback several wires to return continuity of current .
The corruption of the one map in the ECU points towards electrical gremlins, The reframing and placement of the wiring harness, points towards poor installation.
The bike had an Acumen oiler fitted, the spikes into the existing wiring was a complete disaster zone. Might just of well cut the wires and twisted them together and wrapped a bit of insulation tape round it. No comment on who did it.
 

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morning Pete,

have you looked underneath the relay bank behind the Ecu yet?

i also had to tweak some of the connectors on mine inside the plastic insulator block to make good contacts.

its also worth removing all the small relays giving them and their connections a clean too if you've not already done it. And swap them around when fitting back in just to see if one or two have become troublesome.

worth a try :lager:
 

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Discussion Starter · #12 ·
morning Pete,

have you looked underneath the relay bank behind the Ecu yet?

i also had to tweak some of the connectors on mine inside the plastic insulator block to make good contacts.

its also worth removing all the small relays giving them and their connections a clean too if you've not already done it. And swap them around when fitting back in just to see if one or two have become troublesome.

worth a try :lager:

Found it

The two earth wires from the starter motor stud that holds the relay bracket and then the n/s cover, the single earth wire that disappears into the harness not the main battery return.
The thing had got hot at sometime and the sheathing had gone brittle, cut that off and the inner wire had cooked and broken. Cut that off , new earth tag soldered on to a new bit of cable and soldered and sleeved into the harness. job done . Have one more to solve, brake lights on, both switches disconnected and brake light permanently on , so must have a cable shorting somewhere. Hey ho its a Benelli, what else would you be doing on a sunday morning .
Instead of the lights working, together with indicators and dash powering up on the key, the flasher and main beam light were lit up , but nothing else, work that one out !
 

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Hi mate if it’s anything like my Cafe’ Racer that wouldn’t be a common wire it’s sharing with.
On mine it has a loom which has 2 ends to the battery. One + , One -, on the other end it splits to 3 wires.
1 of them should be Ground attached near sprocket cover, the other 2 should be Connected/Split positive to Starter Relay .... The other to the Alternator which I’m assuming would be the charging wire to the battery + ? The Black wire going to the starter is actually a positive wire waiting for a signal from the relay to become active then earth out through the Chassis.
It may not be the case on your bike but this is how mine is configured.
Hope that helps mate?
 
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