This is topic Ignition signal wire issues in forum Tech Talk at Northern California Ford Owners  .


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Posted by LXjames (Member # 10791) on :
 
So I have a brand new ignition switch, brand new motorcraft starter solenoid, good optima battery, a new mini starter and cables, both engine grounds are good and the solenoid is firmly BOLTED to the fender apron. I put the car in the on position with all the wires connected and the starter jumps on and wants to stay running even as the motor is on. I have just under 12v at the red and blue signal wire with the key in the on position. I traced the harness back almost past the master cylinder and no visible problems. At the clutch position switch I have the black connector jumped with a small amp blade fuse. This is a 5 speed converted car to my knowledge. Any help is appreciated. Next move is to just drop it off at a buddy shop for a while but would like to see if there is a home fix for it.
 
Posted by Fostang (Member # 3752) on :
 
Too many changes have been made that makes it a tough thing to diagnose over a forum and not hands on.

I would check for power at the S and I on the solenoid when it stays engaged.

It should only have power on start up. Also with a mini starter they have their own solenoid on the starter and I have a feeling you have it wired wrong.

You may look into rewiring it like a 93 mustang.
 
Posted by LXjames (Member # 10791) on :
 
quote:
Originally posted by Fostang:
Too many changes have been made that makes it a tough thing to diagnose over a forum and not hands on.

I would check for power at the S and I on the solenoid when it stays engaged.

It should only have power on start up. Also with a mini starter they have their own solenoid on the starter and I have a feeling you have it wired wrong.

You may look into rewiring it like a 93 mustang.
All the parts listed are brand new, the mini starter is wired exactly how the instructions say to do so. Motorcraft solenoids have only 1 small stud for the signal wire
 
Posted by Fostang (Member # 3752) on :
 
Doesn't matter if they are brand new or not.

There is obviously something energizing the solenoids or the benedix is sticking.
 
Posted by LXjames (Member # 10791) on :
 
quote:
Originally posted by LXjames:
quote:
Originally posted by Fostang:
Too many changes have been made that makes it a tough thing to diagnose over a forum and not hands on.

I would check for power at the S and I on the solenoid when it stays engaged.

It should only have power on start up. Also with a mini starter they have their own solenoid on the starter and I have a feeling you have it wired wrong.

You may look into rewiring it like a 93 mustang.
All the parts listed are brand new, the mini starter is wired exactly how the instructions say to do so. Motorcraft solenoids have only 1 small stud for the signal wire
Here it is on a 7 dollar autozone solenoid. Was told I needed to ground it better (missing 1 of the bolts to hold it on). Worked properly for 1 day and overnight it would stick on me so I would have to jump the studs with a screwdriver. -

Here it is on a 30 dollar motorcraft solenoid wired all the same as per instructions of lmr mini starter kit, sanded down the fender apron and bolted it in to insure a good ground -
 
Posted by Fostang (Member # 3752) on :
 
I would check voltage readings before after the solenoid and signal wires.

That should lead you to your problem area.
 




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