pekwah1
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| posted on 20/3/11 at 11:40 AM |
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Another starter poles question!
Hi Guys,
I'm at a stage now where i'm about ready to attempt the 1st start of my car (my pants are about to explode!!!!)
However, i'm not completely sure how i'm supposed to wire up the starter motor.
As per the pic, i have 2 big contacts, one smaller thread, and a spade connector.
So i'll label them as follows:
1. Big thread (attached to motor)
2. Big thread
3. Small Thread
4. Spade Connector
Now i thought that 2 should be a permanent live to battery, 3 should be a switched live, and the whole thing is earthed from a mounting bolt to the
engine block, which in turn is earthed back to the battery.
This would mean 1 only connects the starter motor, and i have no idea what 4 is.
Any help would be awesome and then i can start working on the next problem!
Regards,
Andy
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ash_hammond
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| posted on 20/3/11 at 11:44 AM |
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Big thread goes to the battery.
Smaller thread is the switched live from the ignition.
It earths through the body.
Or thats how mine works and it loosk identical.
HTH
Ash
.: www.mac1motorsports.co.uk | www.m1moc.com :.
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pekwah1
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| posted on 20/3/11 at 11:47 AM |
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yeh thats what i thought, however, the only way i can get life out of it (direct from battery) is as follows:
live to big thread attached to starter motor
neg to spade connector
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bigrich
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| posted on 20/3/11 at 11:51 AM |
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the spare probably is used to power a ballasted coil when cranking. so should output 10 volts or so when cranking.
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A pint for the gent and a white wine/fruit based drink for the lady. Those are the rules
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omega 24 v6
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| posted on 20/3/11 at 12:45 PM |
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Small threaded to starter switch ( sprung loaded part)
Big term to battery
starter big term leave as is.
Spade??
OH and make sure you have a heavy duty earth strap from the engine to the chassis and or battery neg
If this does not work then try the threaded term wire on to the spade term instead and see if that does it.
If this does not work then prob the solenoid is fubared
If it looks wrong it probably is wrong.
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pekwah1
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| posted on 20/3/11 at 12:47 PM |
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thanks for the advice guys,
to be clear the motor itself and the solenoid are definitely both fine as it's been tested off the car.
Well when i say they're both fine, the solenoid is definitely healthy and the motor does spin...
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rachaeljf
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| posted on 20/3/11 at 01:01 PM |
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Andy, that will be because you're passing current from the big terminal, through the motor windings to the starter body then back through the
solenoid to the battery negative. This will spin the motor on the bench, but would not have the desired effect on the car!
Your terminals should be, using your numbering:
1 Don't touch the terminal that has a thick wire going into the starter body - you should see it looks as though it hasn't been touched
from the factory and has no spare threads to take any more connections. It would only be disturbed to replace a solenoid.
2 Large threaded (30) goes to battery +ve.
3 Small threaded (15a) goes to coil ballast bypass (only used if you have a ballasted coil, or the fuel injection ecu or pump relay needs such a
connection).
4 Spade (50) goes to starter switch.
You might see the above (DIN standard) numbers embossed on the plastic next to each terminal.
There is a fifth "terminal" that is the body of the starter - this has to earth via the engine and its earth strap back to the battery
-ve.
Try putting the battery +ve onto the top large terminal, battery -ve to the starter body. Then touch another +ve to the spade terminal. The solenoid
should give a loud click, the pinion at the end should shoot forward and the motor should spin.
Cheers R
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pekwah1
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| posted on 20/3/11 at 01:06 PM |
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thanks rach, that's probably the most comprehensive answer so far!
so last question, in terms of earthing the engine to the battery, is there a preferred place to earth to on the engine, and do you need more than
one?
I am aware that the engine also needs to be earthed to the chassis, again, how many do i need and again, a prefferred point to take from the engine?
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adithorp
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| posted on 20/3/11 at 01:55 PM |
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You only need one earth from engine to battery and that can come from anywhere on the engine thats convienient but its common to use one of the
starter bolts.
Chassis earth can be either to the engine or more commonly direct to the battery and agian you only need one.
"A witty saying proves nothing" Voltaire
http://jpsc.org.uk/forum/
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rachaeljf
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| posted on 20/3/11 at 01:57 PM |
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No worries!
Most cars have just one engine earth strap. It usually runs from the bellhousing to somewhere nearby on the chassis. Make sure there is some slack to
allow for engine movement. The battery is usually earthed by a single cable to the chassis adjacent to where it's mounted.
Cheers R
BAH, beaten to it
[Edited on 20/3/11 by rachaeljf]
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pekwah1
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| posted on 20/3/11 at 03:14 PM |
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Thanks for the help guys, i have gone and purchased some proper cable, and as per rachael's advice, the starter is now cranking the engine a
treat!!!!
Shame i have no spark, but that's another post.....
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