Re: Massey Ferguson 231s ignition switch wiring

Posted by Steve@Advance on August 20, 2017 at 13:21:05 from (66.169.147.211):

In Reply to: Massey Ferguson 231s ignition switch wiring posted by ccoop89 on August 20, 2017 at 10:06:58:

Welcome ccoop89!

Well, you asked for any hep, so here goes...

I don't know the color codes, so if someone comes along and knows them, that will make this a lot easier. But if I found myself in this situation, this is what I would do:

Start by taking the battery cable loose before something goes terribly wrong!

Then pull the new switch out so you can see the back side of it. You will need an ohm meter to sort out the terminal configuration.

I am assuming the switch has 4 positions, off, preheat, run, and start.

There are 4 terminals on the switch, one will be power FROM the battery. The other 3 will be power out TO the various circuits.

Using the ohm meter, and the process of elimination, and knowing what each position is from having operated the tractor, you can figure out what each terminal does.

Start with the off position. There should be no connection between any terminals.

Then turn the switch to a known position. There will now be connection between 2 terminals. Write down that result.

Then turn the switch to another known position. Check the connection again, write that down. Continue through each position.

You will see a common connection between each position. That common terminal will be the BATTERY terminal, power FROM the battery.

Each of the other terminals will be power out TO each circuit.

Now that you have that information, go back to the tractor. Be sure the transmission is in neutral! Under the dash, separate the wires so they are not touching anything or each other. Sit the battery cable back on the battery post.

Using a volt meter or test light, check each wire for voltage. Should find one wire with voltage, that is the BATTERY wire, power FROM the battery. That will go on the BATTERY terminal of the switch.

Next, start with one of the remaining wires, touch it to the battery wire and observe what powers up. A small spark is normal. Example, if the run solenoid clunks in, that is the run position wire. Connect it to that terminal.

Then go to the next wire, if it makes the glow plugs solenoid pull in, that is the preheat wire. Connect it to the preheat terminal

If the last one pulls in the starter, connect it to it's terminal.

Should be pretty simple, just take it a step at a time. Be careful!

Replies:

Add a Reply! You must be Logged In to Post Name: E-Mail: Subject: Comments: Optional Link URL: Link Title: Optional Image URL: Optional Video Title: Optional Video URL: Advanced Posting Options Email Notification: If you check this box, email will be sent to you whenever someone replies to this message. Your email address must be entered above to receive notification. This notification will be cancelled automatically after 2 weeks. No political comments, hate speech or bigotry of any kind will be tolerated. Violations will be removed and posting privileges may be permanently revoked without notice.   Advanced Posting Tools   Upload Photo  Select Gallery Photo  Attach Serial No List  Return to Post  Upload Photos/Videos Choose Files from your local computer Upload one or more videos to your post. Photo filesizes should be less than 300K and Videos, less than 2MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.

TRACTOR PARTS	TRACTOR MANUALS

We sell tractor parts!  We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]