24 replies to this topic

[imack]

Battery cables not shorting on the LCB is it and getting moved away slightly when you disconnect it from the starter and appearing to rectify other electrical issues?

[Tonylamb]

A good thought, next task is to trace battery cable along its full length to see if its touching something. Then I'm going to remove the ignition button wiring and see if thats the culprit. As I said this is probably going to be a process of elimination. It will probably be something simple and dumb.

[Ethel]

The mystery here is why the lights are working intermitently along with the ignition switch? This only seems to happen with the battery cable connected to the starter motor??? Disconnect the starter and all the other electrics are fine. I still have the old solenoid on the wing but am just using it as a junction box basically If the main battery cable was shorting out the battery would go flat pretty quickly. The only other wire connected to the starter is the ignition swtich/button. i suppose I could trace that back to the switch or remove it and use a short wire as you suggested. Any other suggestions or ideas of where to look. Presumably a process of elimination from this point.

This could alter things a bit.

 

How's the pre engaged motor connected? Off the same post on the wing mounted solenoid as the battery & brown lives? Is the wing solenoid connected anywhere else?

[Tonylamb]

Yes off the same post. The main battery wire comes into the old solenoid and is connected to the same post as the brown ignition wire. Then a new bit of main cable goes to the starter motor. I dont use the solenoid. Its just a terminal

[nicklouse]

Yes off the same post. The main battery wire comes into the old solenoid and is connected to the same post as the brown ignition wire. Then a new bit of main cable goes to the starter motor. I dont use the solenoid. Its just a terminal

so which solenoid are you not using? if the old wing mounted one do you have a relay to trigger the new starter mounted solenoid?

[Tonylamb]

Im not using the old wing mounted solenoid. The main battery cable and the large brown ignition cable are joined at the old solenoid. The starter us triggered by a starter button the wire from which goes to the other side of the old solenoid and then is extended to the large spade terminal on the solenoid on top of the starter moto

[Tonylamb]

Some additional info. The battery I had was if unknown origin and was cca 300 amps and 35 amp Ah. I have a bigger one which is cca 550 and 60amps. Ive also attached a pic of the old solenoid which Im basically using as a terminal block!!! There are three brown wires one is heavy duty presumably ignition circuit. The other two are smaller gauge probably power to fuses? There is also a brown and blue lights maybe? Ill check the wiring diagram. Forget the purple one thatvis the power to the driving lights relay. Ive installed the bigger battery and it seems to turn over now????

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[Tonylamb]

The pink wire is the one from the starter button which just connects to the red and white which goes to the large spade on the starter solenoid

[KTS]

The pink wire is the one from the starter button which just connects to the red and white which goes to the large spade on the starter solenoid

 

as Nick mentioned above, if using a pre-engaged starter motor (..with built in starter solenoid) then you need an additional relay (?70amp rating?) to drive the starter solenoid

 

the white/red from the ignition switch should used to trigger the starter relay which then provides power to the starter solenoid (through appropriately sized cable!)

 

edit:  if the old starter solenoid still functions, you should be able to re-purpose it as the starter relay by moving adding a suitable sized cable (6mm² maybe?) from the output terminal to the starter solenoid and moving the line from the ignition switch back to the small spade terminal that would have been used in the inertia type starter setup

Edited by KTS, 08 July 2020 - 10:47 AM.

[nicklouse]

Oh dear me that wiring is a mess. If you are just using it as a junction point then why do you have wires (Multiple) that are switched? When you only need one to trigger the solenoid on the starter? In which case the old wing mounted solenoid would be the result for the stater mounted solenoid.