|
|
Post by billbott on May 17, 2023 22:54:20 GMT 1
Just been putting my clocks and switchgear back onto my 4L0 after it’s clean up but the neutral and oil lights on the Speedo have stopped working?
I’ve had all the connectors apart but nothing looks amiss.
I’m no electrician but have got my tester out, to try and trace the fault. What I have found, is that the neutral light bulb holder is 12v on the brown wire side and pulsing 0/12v/0/12v on the light blue side. All the other bulb holders are 12v on the brown and zero on the ‘coloured’ wire which I’m assuming is correct (mainly because they work!)
On the plug connector for the clocks lights, the light blue on the loom side of the plug is also pulsing live so I don’t think it’s the bulb holder?
It seems from the wiring diagram that the neutral and oil lights are linked, but even if I disconnect the bulb from the neutral light, the oil light still doesn’t work?
It has a vape system fitted if that makes any difference (assuming not)
Can anyone help me out please?
|
|
|
|
Post by 4l04ever on May 17, 2023 23:27:08 GMT 1
Check the neutral switch. Try shorting the pin on the neutral switch to the engine casings and see if the light comes on. Could be that wire is damaged, so the light might not come on even with the connection grounded.
|
|
|
|
Post by billbott on May 17, 2023 23:30:12 GMT 1
Check the neutral switch. Try shorting the pin on the neutral switch to the engine casings and see if the light comes on. Could be that wire is damaged, so the light might not come on even with the connection grounded. Thanks Rob, wil try that tomorrow 👍 |
|
|
|
Post by shaunthe2nd on May 17, 2023 23:34:29 GMT 1
Daft comment, but the bike is definitely in real neutral and not a false neutral?
|
|
|
|
Post by JonW on May 18, 2023 0:29:34 GMT 1
I'd defo say its not the VAPE, this circuit is independent of that unit.
I'd say the neutral switch isnt connected all the way along the circuit.
Pulsing... low battery and indicator is switched on? not much else to pulse in this system...
|
|
|
|
Post by billbott on May 18, 2023 6:45:14 GMT 1
Daft comment, but the bike is definitely in real neutral and not a false neutral? Not a daft comment at all - but yes it is in neutral  |
|
|
|
Post by billbott on May 18, 2023 6:49:43 GMT 1
I'd defo say its not the VAPE, this circuit is independent of that unit. I'd say the neutral switch isnt connected all the way along the circuit. Pulsing... low battery and indicator is switched on? not much else to pulse in this system... Having looked at a colour wiring loom while in bed last night, i am wondering if the oil tank level sender is faulty (maybe a short) as the light blue wire is common to both dash lights? Last time i used it, i do remember the red and green lights flickering when it was ticking over but thought it was because the battery was low on charge. Wonder if the vibration is allowing two wires to touch intermittently?  Everything else is working fine including the indicators and horns. Would a continuity test between the light blue wire and red/black wire on the oil tank sender reveal the issue (as they shouldnt be connected???) |
|
|
|
Post by billbott on May 19, 2023 17:42:44 GMT 1
Ok fixed…
Tried Rob’s suggestion and it didnt make any difference grounding the neutral wire from the switch (near the sprocket) to the engine casing……..
So I disconnected the (light blue) wire at the loom end behind the battery box (it has a connection there because of the vape)
Earthed it to the frame and the lights came on, so assumed the wire from the switch which I slid into the vape stator sheath was faulty.
Fitted another wire and it didn’t work…..
Bodged up (I mean fixed) another neutral switch and still nothing.
Took a wire straight from the connection at the top and touched it on the pin on the end of the selector in the casing and still nothing…
Hang on a minute……
Put it all back together and earthed the engine to the frame and bingo, everything worked!!!
So I’m not sure why the engine isn’t earthed? All the mounts are tight.🤷🏼♂️🤷🏼♂️🤷🏼♂️
I’ve made a permanent connection from one of the top casing screws under the carbs to the frame now .
And why did it work before, I’ve had the bloody thing for 18 years, never needed to Earth it before!
Anyway, thanks Rob for the initial idea 👍👍👍
|
|
|
|
Post by stusco on May 19, 2023 19:04:54 GMT 1
When i first joined here someone told me to always fit an extra earth/ground from the engine to the frame just in case ,works for me,mine is under the tacho drive to the nearest engine mount
|
|
|
|
Post by 4l04ever on May 19, 2023 19:13:14 GMT 1
When fitting a Vape there is no earth connection to the pickup, so you have to add one from engine to chassis.
|
|
|
|
Post by billbott on May 19, 2023 21:58:23 GMT 1
When fitting a Vape there is no earth connection to the pickup, so you have to add one from engine to chassis. Ah makes sense, just confused as to why it’s been ok for 5 years and only manifested itself now 🤷🏼♂️ |
|
|
|
Post by JonW on May 20, 2023 0:42:55 GMT 1
mystery solved!
Well done Bill.
|
|
|
|
Post by elsiefan on May 20, 2023 1:07:24 GMT 1
When fitting a Vape there is no earth connection to the pickup, so you have to add one from engine to chassis. Ah makes sense, just confused as to why it’s been ok for 5 years and only manifested itself now 🤷🏼♂️ My first thoughts would be has anything changed since the lights were last working? Something that could have dislodged or broken a connection somewhere. |
|
|
|
Post by billbott on May 20, 2023 8:39:11 GMT 1
Ah makes sense, just confused as to why it’s been ok for 5 years and only manifested itself now 🤷🏼♂️ My first thoughts would be has anything changed since the lights were last working? Something that could have dislodged or broken a connection somewhere. As were mine! Automatically assumed it was a bad connection having had nearly every connector apart during its clean up. Think it’s August last year since I used it last. Had found a couple of dodgy wires so replaced them but all soldered and heat shrinked. |
|
|
|
Post by 4l04ever on May 20, 2023 9:00:49 GMT 1
When fitting a Vape there is no earth connection to the pickup, so you have to add one from engine to chassis. You can just add an earth connection to the pickup with a small ring terminal connected to the pickup fixing or stator plate and the other end to your CDI/Ignition unit. The earth to the engine is only used for the pickup AND the neutral light... |
|
