Strange briggs electrical issue

bertsmobile1

Lawn Royalty
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Nov 29, 2014
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OK I just don't get it.
Previously this mower was starting and running fine, the cut out wire just needed sorting out.
http://www.lawnmowerforum.com/small-engine-mower-repair/34923-etesia-ride-mower-electrical-loom-help.html

Now it is back again, with a differnt title which has no relivance to the problem as the Briggs is working fine, it is the mower wiring that is the problem.
The same photos and same wiring diagram have been reposted.
Follow the instruction given to you a few weeks back and you will be fine.
The mower still has the throttle wire kill switch wired up and again none of the posted photos show where the black wire attached to the yellow wires on the throttle plate goes to as you were asked in the previous posts but never bothered to reply to.
I am starting to wonder if you really want help to get this thing going or are just looking to waste every ones time.

As for the "contradictory wiring diagrams" they are not.
The first one is a schematic which shows you how everything is wired together.
The second is a layout and shows where all the plugs are on the loom.

A wire shown in the schematic can look to be 2" long, but on the mower is 40' because the individual items are laid out in an electrically logical manner and not how they are placed on the mower.

SO back to mower wiring 101
Your switch has the following terminals on it and they are wired thus

G = GROUND , earth, negative ,,,,,,,,,this wire just connects to the - terminal of the battery or the frame
B = BATTERY , positive, power ,,,,,,,,,,,,,,,THis wire goes to the red, power, positive terminal of the battery. Usually it goes from the power feed to the starter solenoid to the switch, via a fuse.
M= MAGNETO, Coil, Spark,,,,,,,,,,,,,,,,,,,,,,,,,This is the kill wire to stop the engine going bang when you have finished, it earths out the magneto
S = START, SOLENOID ,,,,,,,,,,,,,,,,,,,,,,,,,,This wire goes to one of the control wires on the starting solenoid. It provides + 12V to the starter solenoid to make it work and power the starter motor
L - LIGHTS ,,,,,,,,,,,,,,,,,,,,,,,,, This wire turns on the headlamps where fitted. It is the only confusing part as it might be +12V or earth depending upon which alternator is fitted.
A = ALTERNATOR ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, This wire connects the alternator into the circuit so it can recharge the battery


Complications

The power from the S terminal will go through a few switches all of which need to be closed to make a loop from the S terminal all the way to one of the control terminals on the starter solenoid.
Generally from B to S to the PTO ( blade switch ) then to the parking brake switch, then to the solenoid.
Your mower has a 4 pole solenoid so it will need both a + ( via the S terminal ) and a - connection at the solenoid for it to start the engine. As you were told previously. had done previously and now disconnected.

Kill wire M is closed by connecting to the G terminal in the off position to stop the engine running.
Somewhere in the loom there will be a lot of wires that also connect to the magneto to earth . They all work so if any single one of them is closed ( or a couple together ) the magneto earths out and the engine stops.

On mowers that had a pull start B &S also fit a throttle kill switch so when you close the throttle fully a contact behind the throttle plate connects the magneto to earth and the engine also stops.
This is what the short yellow wire is for.
It is not normal to have both a switch kill wire and a throttle kill wire connected at the same time.

If you are having trouble understanding who is who , what is what and which goes where, then do as suggested and color in your wiring diagram. Write the names of the switches on the diagram and where a number is nothing more than a plug or bolt, write PLUG or BOLT on the diagram and it will become obvious.
 
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