Ok so my baby monster has a damaged flasher that is built in to the clocks on m620 up. My right side indicators are working my left side is not. I can replace the dash or wire in a flasher relay. I am going for option 2. I have two options here one I know what to do so just need confirmation, it has a half baked solution. 2nd is proper solution. There is total of 5 wires going in to the dash from indicators. Earth that then splits to all for units plus + for each indicator going to their respective pin in dash. Option 1. I keep working side of indicators connected to dash, together with ground, keeping existing flasher to operate right side indicators. I then disconnect two V+ wires responsible for left side indicators, link them together and connect them to correct connector on flasher relay (left side to keep it easy) plus I tap in to ground and connect that to relay as well. Both indicators should be working yes? Existing led (idiot light) for indicators is flashing for right side indicators and previous owner installed green led in same spot for his fix. I run a wire from that led to same connectors on flasher relay (left and ground). Should then have green light for both side indicators. That option is half fix as the moment flasher relay fails completely in dash I loose right side of indicators and have to do it all over so prefer option 2. Option 2. I bypass flasher in dash all together. First few steps easy. Disconnect 4 V+ cables plus tap in to earth. Connect earth to middle prong on flasher. Join right hand side indicator V+ wires (back and front) and connect to right side prong on flasher relay. Do same for left side with left side indicators. Presto I have indicators. Am I right? Where it gets complicated is how to make idiot light working. I can use the already mentioned LED. To make one side work I just connect earth of LED to earth wire of flasher relay and V+ side to for example left prong of flasher relay. But that would only make it flash for left hand side indicators. If I were to also connect it to right side prong at the same time would it work or would 12V+ travel back to relay making both indicators flash or even relay burn up? Or is it that the 12V+ travelling back through loom would stop at indicator switch and never reach lights while relay would take the load? I want to use existing loom to minimize extra wires as much as possible. I also do not want to run unnecessary wires all over the bike. Till here it all looks easy but one more thing that escapes me is how the switch comes in to play here? I cannot find corresponding wires going from indicator switch to dash on electrical diagram. I guess there would be 3, earth and two V+? (not including those that go to the switch delivering current in first place as those stay intact).
I can't see either of these working as you have them. Nor can I see a way of using the existing switch as it is to operate indicators from the dash on one side and indicators from a flasher unit on the other. The dash has outputs for each flasher , left front and rear and right front and rear and supplies 12V on/off to which ever ones are activated. The dash get's an earth from the indicator switch to turn whichever side is selected on. Flasher units normally have 12v from the ignition on circuit on one side. the other side going to the switch which makes the circuit to the left or right. When one side is selected the 12v goes through the flasher to the indicators which complete the circuit to ground turning the flasher on. You would need to fit a 2 pin flasher unit between 12v and the common wire to the indicator switch (Blue/Black currently connected to ground) The 2 White/Black wires from the dash (left indicators) would need to connected together and joined to the Green/Black from the indicator switch. The 2 White/Green wires from the dash (left indicators) would need to connected together and joined to the Blue/Green from the indicator switch. A separate indicator warning light would need wired across the 2 indicator circuits as you have above. If you like I can draw you up a circuit.
Derek please could you draw up a circuit so I can tackle this tomorrow. I have ID all the cables now by looking at diagram and decidedthe best ploace to go in to the loom is where it splits to go to left hand switch connector as there I should have all wires that go to dash and all wires that go to switch.
Hi Luca, Here are 2 diagrams based on the official Ducati layout. One shows the original wiring and the other the modded wiring to enable flashers without the dash. Note that the rear right flasher wire is Pink/Black not White/Black as I said above. It is probably best to make the cuts a few inches back from the dash connector leaving long enough tails so that you can re-instate the original wiring should you later replace the dash or get it repaired. The 12V for the flasher unit would be best picked up from the violet wires which supply the brake light, horn and headlamp flasher circuits.
Derek Thx, that looks much clearer now. I will cut in to them loom about 20-30 cm from dash. It is where the 1st set of wires that are indicator related are splitting off main loom. To be exact front head light as it also has indicator connector on it. That way I will minimise the wire needed for relay and will only have to run two longer wires to LED. Looking at old loom from 620 I can see all wires you mentioned including the purple one. so I should be good to go tomorrow. Indicator land here I come, next stop belts and tyres
I only just noticed that I labelled the rear indicators with left and right reversed. No matter, you got there.
I did not notice that as I used common sense for linking indicators and only then your diagram. At the end it is obvious both front and rear left/right need to link together. Now all I need to do is much longer cables going to the flasher so I can re-located to under the tank.
Ok Derek something seems a miss. Today my right side indicators malfunctioned. When switch was on you could hear relay flashing, no indicators on, reserve light was flashing instead plus fuel pump was from time to time hesitating. From time to time when activated you could see a faint light on right indicator but not much. It starts when bike is hot and gets a jolt (pot hole). When bike cools off all works fine again. Same on ride home. When I got home I started wiggling wires with no luck nothing made it work, only when engine cooled off. If I left the right indicator on long enough it would start smelling of burning plastic and fuse would blow eventually. No idea where the smell comes from as relay is located about the same area I made the cut in to the loom to connect it. It does not come form area where I have disconnected wires from dash and joined them together (rear/front left and rear/front right). Any ideas why fuel circuit gets affected? I am thinking that head issue might be the key as in relay is damaged so when it gets hot it shorts. When it cools off it works so will get new one as first point of testing.
That doesn't sound good Luca. I'll have a look at the wiring diagram tomorrow and see if I can figure out what's going on. I'm having trouble with my internet connection just now so can't promise a quick answer.
I looked at that diagram over and over. See no way we could get in to fuel circuit with exception of via earth as all is earthed. I am thinking when right indicator is on and something goes a miss (relay or somehow cables) it shorts to earth affecting all electrics. It is definitely not cables relating to indicators them self as before I fitted relay right side indicators were the one's working and it never done it. Will avoid right indicator for now, one uses it much less then left, as I have no time but have MOT by end of this month so have to fix it by then. I will get new relay as this one was old when I fitted it so might be it. Will also check cables around relay socket. Question if cable was broken (but not shorting to another) would it do that?
I can't really see what's going on here but for the reserve light to come on the Blue/White wire from the dash would normally get earthed by the fuel sensor. Both the fuel pump and the sensor share the same earth so it suggests there may be a fault with their earth connection. The indicator wiring should be completely independent from the fuel system wiring but since only the right side is causing the fault suggests the fault is at the switch or, more likely, downstream from it on the RH indicator circuit. How are they earthed? Sorry I can't think of any other ideas right now. I'd suggest disconnecting the indicators one at a time and see what happens to the fault. Try to isolate it to LH/RH Front/Rear. Good luck
I'd another thought about this Luca and I'm sure that it's an earthing problem. Like you sometimes see on a car when the indicators are on the the brake lights and/or tail lights flash. If there is not a good earth the current will find the path of least resistance. The indicators don't earth at the lamps but earth back through the loom. It's possible that a bad earth somewhere could cause this. Try a separate earth wire to one of the RH indicators and see if there is any change.
Was thinking the same but the realised that both side indicators go to same earth no? I should be able to earth at relay or actual indicator so easy enough test just in case. Will report back.
Both sides may not go to the same earth point. The relay is upstream of the switch and should only have 2 connections, none which are earth. It should output to the switch which directs to either side and each indicator bulb should be earthed.
I have 3 connectors in relay?! One of them is earth I am certain of that as I have two cables that go to LED idiot light. I will fiddle on Saturday and get it sorted.
