TiltyShaun
Well-known member
I now appreciate how blessed I am to have a local starter and alternator repair man. I take it to him…..he tests it……then…..we have options depending on what he finds.
Option 1. He repairs it (usually the most common and cheapest)
Option 2. It is really goosed and he sells me a new one (another option we have experienced)
Option 3. After 1 of the above options we find it still doesn’t work. We then go searching through the wiring to find out why!! (This thread is doing the wiring first then working out of the unit is the problem)
Option 4. Lighter and match (This option tends to follow on if the previous 3 options fail)
Good luck with your continued work!!
Option 1. He repairs it (usually the most common and cheapest)
Option 2. It is really goosed and he sells me a new one (another option we have experienced)
Option 3. After 1 of the above options we find it still doesn’t work. We then go searching through the wiring to find out why!! (This thread is doing the wiring first then working out of the unit is the problem)
Option 4. Lighter and match (This option tends to follow on if the previous 3 options fail)
Good luck with your continued work!!
Vinpetrol
Well-known member
Sorry bud , at the solenoid , big feed from battery. Is that where it should be ? It was dangling free so I had a guess !
Vinpetrol
Well-known member
I used to have an electro diesel go to like that years ago. That’s why my knowledge is limited to say the least !
I’m not opening the swan vestas just yet though !
Vinpetrol
Well-known member
Of course
pitch black out now so will try tomorrow evening after work
V8Druid
do it as well as you can,but learn to do it better
no - the only wire between the alternator and that battery main feed should be from the B+ or the 10mm spades (all linked anyway)
as far as can be ascertained that black is from the battery temp. sensor ?
Vinpetrol
Well-known member
It may of been a previous attempt at a bypass of the battery temp sensor . This tractor is 42 years old Im defo not the first meddling with it .
Also I think the drawing supports the supply coming from the starter solenoid.
No 8 is alternator, No 9 is starter solenoid and No 12 is batt temp sensor
What do you think ?
V8Druid
do it as well as you can,but learn to do it better
not the greatest of Dia.s ... the line between 8 and the solenoid is the B+ line supplying the battery with power (+ve pole) when charging
the other line which tees to, other things, (which I can't see), is coming from the starter solenoid's coil's +ve feed (other side feeds to earth) so is only live on crank (from that end anyway)
I assume 7 is the start position on the ign sw. (or a starter button if one was/is fitted) and thence to the alternator's special pole via the temp. sensorcould really do with seeing the entire diagram Vin
Vinpetrol
Well-known member
Is my previous upload of it not clear enough ? I had to take a pic of it as I couldn’t upload pdfnot the greatest of Dia.s ... the line between 8 and the solenoid is the B+ line supplying the battery with power (+ve pole) when charging
the other line which tees to, other things, (which I can't see), is coming from the starter solenoid's coil's +ve feed (other side feeds to earth) so is only live on crank (from that end anyway)
could really do with seeing the entire diagram Vin
Gecko
Well-known member
I'm struggling to make sense of the diagram too. My guess is 7 is a neutral interlock. From there, the wire seems to go to 73 (ignition switch?).the other line which tees to, other things, (which I can't see), is coming from the starter solenoid's coil's +ve feed (other side feeds to earth) so is only live on crank (from that end anyway)
The two wires that T-off - one goes to 73 and the other goes to relay 71.
Vin, how are 7, 71 and 73 described in the manual?
V8Druid
do it as well as you can,but learn to do it better
I spent close to 2 hrs trying to suss that dia last night and it does not make sense in a few areas ..
7 is a safety cut out sw. on crank circuit (clutch pedal possibly)
71 is ignition relay (doesn't control solenoid but all other ancillaries -heater/wipers/etc.)
73 is ign sw. but I am wondering if the 5 pin diagram I put up a few pages back is the right one for the application? the sequencing on that doesn't look to be right for the way this dia. operates
Vin - can you put up the wiring diagram for the new switch together with its sequence of operation (like the 5 pin-er I put up a few pages back )
it is one weird sequence of events when turning the key
there's also one item in the dia. that's not numbered
the item below 13, on a green wire ?? it's in parallel with the heater plugs - bulb perhaps, but wrong symbol - perhaps one of those 'glowy' things you often see in a traccy dash - chrome with holes in it and a coil that glows behind it - indicator they're energised?????
14 " thermostart"
15 is air cleaner vac. sw.
I am damned if I can see how the ign sw. gets a feed from the battery (6) though - only thing connected to the +ve pole is the alternator's feed ????
and I am convinced that the wire below would provide a constant feed to the starter solenoid
Gecko
Well-known member
OK, that now makes sense - The ignition switch puts 12V on one side and the low resistance coil of the starter looks like ground, so the relay closes giving power to the Aux. items.
When the key is turned to start, the starter solenoid gets power and the ignition relay gets 12V on both coil terminals causing it drop out and lessen the load on the battery (pretty well the same as the Alt. warning lamp).
Similarly, the wire you has marked as questionable will also provider 12 to the cold terminal of the Temp Compensator - this will look like a hot battery causing the Alternator to shut down reducing the load on the starter.
Now you made me look at that - it gets power through one of two diodes (74 and another that is un-numbered).there's also one item in the dia. that's not numbered
Is 48 the fuse block? Diode 74 gets power from what looks like fuse 1 which is fed from the ignition switch as is the un-numbered diode, but from Heat position.
So what do you want 'on' while heating?
V8Druid
do it as well as you can,but learn to do it better
that still does not answer how the ign sw. gets 12v from the battery - there are no direct connections ?????
Vinpetrol
Well-known member
No 7 is described as safety start switch . I think it’s meant to be in neutral to start it but it will start anyway .
71 described as ignition relay
And 73 is described as ignition switch
Vinpetrol
Well-known member
Big fat brown wire to terminal 1 with a wider than normal spade connector
Vinpetrol
Well-known member
Gecko
Well-known member
True.
To be fair, that diagram looks like it was drawn by the work experience kid, so not entirely surprising
To be fair, that diagram looks like it was drawn by the work experience kid, so not entirely surprising
V8Druid
do it as well as you can,but learn to do it better
but it ain't shown on the circuit diagram Vin ---- there is sod all coming from the +ve post on the battery ????????
V8Druid
do it as well as you can,but learn to do it better
yeh - it's appalling - no jumpers - looks to be all tee-ed together - pure bloody guess work as to what connects to what/where
Gecko
Well-known member
Decided it's a fuel pump - 17there's also one item in the dia. that's not numbered
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