Author
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Topic: Ignition signal wire issues
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LXjames
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Member # 10791
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posted
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.
-------------------- On Point Motorsport prez. King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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Fostang
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Member # 3752
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posted
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.
-------------------- 67' Fastback TT 408 67' Camaro Lsx 64' Corvette Fuelie 57' Chevy Bel Air Lsx 68’ Pony Convertible 66’ Pony Coupe
Posts: 3011 | From: Stockton/Danville | Registered: Nov 2003
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LXjames
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Member # 10791
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posted
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
-------------------- On Point Motorsport prez. King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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Fostang
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Member # 3752
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posted
Doesn't matter if they are brand new or not.
There is obviously something energizing the solenoids or the benedix is sticking.
-------------------- 67' Fastback TT 408 67' Camaro Lsx 64' Corvette Fuelie 57' Chevy Bel Air Lsx 68’ Pony Convertible 66’ Pony Coupe
Posts: 3011 | From: Stockton/Danville | Registered: Nov 2003
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LXjames
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Member # 10791
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posted
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
-------------------- On Point Motorsport prez. King Lx
Posts: 4761 | From: Pittsburg CA | Registered: Mar 2011
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Fostang
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Member # 3752
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posted
I would check voltage readings before after the solenoid and signal wires.
That should lead you to your problem area.
-------------------- 67' Fastback TT 408 67' Camaro Lsx 64' Corvette Fuelie 57' Chevy Bel Air Lsx 68’ Pony Convertible 66’ Pony Coupe
Posts: 3011 | From: Stockton/Danville | Registered: Nov 2003
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