Ignition Switch Wiring

[speshulldroo]

Re: Ignition Switch Wiring

I'll start at the top and work my way down:

I have the batt on the B.
I have the starter on the S.
I don't have anything on the Ms, and I will try putting the red wires on the A.
The old switch was a 5 with two not being used.

 

[Nandy]

Re: Ignition Switch Wiring

I'll start at the top and work my way down:

I have the batt on the B.
I have the starter on the S.
I don't have anything on the Ms, and I will try putting the red wires on the A.
The old switch was a 5 with two not being used.

I say, go for it. Your system probably kills the motor by taking the 12v from the ignition. Sound like a distributor/coil...
Let us know how it goes....

 

[speshulldroo]

Re: Ignition Switch Wiring

Figured you might wanna see what you're helping with.

 

[Nandy]

Re: Ignition Switch Wiring

Looks like a fun rig!!! Is that the new switch with the shinny screws aint it! Hope it works man!

 

[speshulldroo]

Re: Ignition Switch Wiring

Well, the four red wires are on A. Still have crank/no start. Doesn't even catch.

The primer bubbles full and it doesn't seem to matter if the choke's on or off, so I'm guessing it's gotta be spark. The only wire that isn't connected is a pwr wire for the light toggle switch, that shouldn't matter, should it?

 

[Nandy]

Re: Ignition Switch Wiring

when you say catch, what do you exactly mean? Have you actually checked for sparks? One thing you can always do is put the cables back to the original switch and use a screwdriver to turn it. That way, if the motor still shows the same problem then you know is not the new switch. However, I would check for spark first. It is easier if you have a spark tester. If you do not have a tester you can use long nose pliers to hold the spark plug boot and check for spark.

 

[P 0 P E Y E]

Re: Ignition Switch Wiring

First, dont connect cables randomly, you might end up frying something. I know in my evinrude if I wire it wrong I have about 2 contact that will go zap... This is a very easy job to do if you are electrically inclined. If you are not you might want to consider passing this to someone that is... I have no specific experience with your rig but most all switches works the same. This is for most ob motors which kill the motor by grounding the magneto. Most OB kill the motor by opening the 12 volt feed to the ignition.

The first obvious thing to do is look at that diagram of the new switch and wire it properly. If this is an ob motor you more than likely will have 2 connections going to the magneto, one for ignition on (accessories), one for the starter (solenoid) and one for the choke (when you push the key in). If you labeled your cables as what they do instead of the location of the cable you should be ok.

If you dont have the diagram or you dont know what each cable is for you will need a voltmeter and will have to trace the cables.

Alternatively: Im sure you are replacing that switch for a reason. If the old switch still works then you need to use a voltmeter to find which contacts works with which at different position... for example..

With the switch in the off position:
You should have steady battery (12v) at one connection. This is your battery connection and will always have 12v unless you have a cutoff switch for your battery.
Your 2 magneto connections should be grounded.
The ignition connection should have no voltage and very low impedance.
The starter connection should be same as previous.

With the switch in the on position:
You should have steady battery (12v) in the battery connection.
One magneto connection should will be grounded and the other one will have low impedance.
The ignition connection should have 12 v.
The starter connection should have no voltage and very low impedance.

With the switch in the start (cranking motor) position:
You should have steady battery (12v) in the battery connection.
One magneto connection should will be grounded and the other one will have ac voltage
The ignition connection should have 12 v.
The starter connection should have 12v and the starter should be engaged and turning.

Hope this help and my memory is not failing me... for IB the difference is there is no connection to the magneto.

Good luck!

Some Very high Quality posting. Nice job

 

[speshulldroo]

Re: Ignition Switch Wiring

By not catching I mean it will crank over without even trying to start. And yes, I had my brother crank it over while I held the spark plug and got nothing. I can't really trace wires because they're all the same color though. I might have to try putting the old one back on... I've been starting it with a screwdriver for about 2 summers now lol. Just replacing it because I finally got tired of it.

I'll put the old one back in real quick, and let you know what happens.

 

[Nandy]

Re: Ignition Switch Wiring

when you say catch, what do you exactly mean? Have you actually checked for sparks? One thing you can always do is put the cables back to the original switch and use a screwdriver to turn it. That way, if the motor still shows the same problem then you know is not the new switch. However, I would check for spark first. It is easier if you have a spark tester. If you do not have a tester you can use long nose pliers to hold the spark plug boot and check for spark.

Or you could get a hold of an innocent bystander and have them hold the spark plug boot and judge by the reaction!! LOL! Bad thing you could only use that person as a tester once.. LOL! Sorry, needed the comedy relief!

 

[speshulldroo]

Re: Ignition Switch Wiring

'Tis okay. It's been a long day.


Anyway, slapped the old one back in and whaddya know, after a couple cranks she started right up... What's the difference?

 

[P 0 P E Y E]

Re: Ignition Switch Wiring

If at all possible, when replacing a switch, you should move one wire at a time. Sorry to state the obvious. I learned this the hard way too.

I would suggest you first check that the switch you have replaced is the same as the one you took out. Meaning that the writing is the same, BAT, IGN, ACC, Mag are the same on each.

You will need to use the color of the wires to assit in the connection to the switch.

Try to study the diagram for help.

Hope you can take your time and get it going.

Opps you got it going Congrats.

 

[speshulldroo]

Re: Ignition Switch Wiring

Problems not fixed yet, it just runs with the broken switch in. And I did check, from old to new, S went to S, B went to B and A went to A. Nothing is different at all.... It just won't work.

 

[Nandy]

Re: Ignition Switch Wiring

What's the difference?

Don't know yet but we are about to find out.
Check with your tester the state of each of the terminals and note it down. Do this for the off-on-start position then post it here. Then we will change the switches, wire it as we think it should work. If it dint then you will have to check the state of each terminal and we will figure it out.

 

[Nandy]

Re: Ignition Switch Wiring

I won't try to get ahead of myself but the switch might be defective. Or if at any time you put the starter in the ignition (a terminal) the 15 amp contact for the ignition might have been damaged (cranking is rated for 50 amp). The later one can be fixed with some creative wiring but we don't need to talk about that just yet. Check your voltage with the old then we will check with the new. That will do it.

 

[speshulldroo]

Re: Ignition Switch Wiring

I think it's going to have to wait till tomorrow. It's awful dark out and I don't wanna PO the neighbors cranking it over while their kids are trying to sleep....

But I'll get out there first thing tomorrow and take voltage readings of every post and every stage. I did notice one thing before I decided to call it a night though. The starter wire had 12v at off, while the batt wire had 0...

Thought maybe I had them backwards, but then why would it still start on the old switch?

 

[Nandy]

Re: Ignition Switch Wiring

That's is your problem. Battery must have 12 v all the time. Seems they are reversed. Try it tomorrow.

 

[speshulldroo]

Re: Ignition Switch Wiring

So just swap the wires between terminals?

 

[Nandy]

Re: Ignition Switch Wiring

Yup! Switch the batt and starter cables.

 

[speshulldroo]

Re: Ignition Switch Wiring

Okay. I'll try that first thing tomorrow, and hopefully go from there.

 

[Nandy]

Re: Ignition Switch Wiring

That should do it. Look at the post I made where I described what voltage u should expect at each different switch position. Ignore the magneto terminals. That is what voltages you should have.