starter keeps going with igniton off
Thread Starter
Instructor
Joined: May 2007
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starter keeps going with igniton off
69 427/400 vert I can turn ignition on and starter turns over fine, but if i turn key off it still trys to crank. Starter and solenoid work fine off car. Any suggestions?
Le Mans Master
Joined: Jan 2000
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From: New Hill NC
Racer
Joined: Nov 2009
Posts: 332
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From: Watkins Glen New York
That's what I would have said too provided it's a new or newly installed switch.
If its old and just started doing this, I would guess that the switch has gone bad. I had this happen on a boat this past year.
If its old and just started doing this, I would guess that the switch has gone bad. I had this happen on a boat this past year.
Le Mans Master
Joined: Aug 2006
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From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
The S terminal wire is purple and is connected to the solenoid terminal closest to the block.
When the purple wire is energized the solenoid coils pull in and that sends power to the starter and the yellow R terminal wire.
Once you turn the key to run or any other position there should not be any power in the S terminal.
Instructor
Joined: Mar 2005
Posts: 155
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From: Apple Valley MN
Had that happen to me once when I was a teenager. I had cranked the motor over for too long because it wouldn't start. The wires going down to the starter overheated from the current draw and melted together shorting them out. I had to jump out and yank the battery cables off to get it to stop.
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Race Director
Joined: May 2006
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From: Dayton, Ohio
Try doing this,disconnect the purple from the S term on the solenoid,put a test light on the purple wire,turn your key to start,confirm test light lights,then release key to ON position,if light stays lit the ignition switch is bad or misadjusted,if the light goes out its something wrong with the starter.
Race Director
Joined: May 2006
Posts: 16,528
Likes: 53
From: Dayton, Ohio
Turning the key switch to "START" sends battery voltage to the S terminal on the starter.
The S terminal wire is purple and is connected to the solenoid terminal closest to the block.
When the purple wire is energized the solenoid coils pull in and that sends power to the starter and the yellow R terminal wire.
Once you turn the key to run or any other position there should not be any power in the S terminal.
The S terminal wire is purple and is connected to the solenoid terminal closest to the block.
When the purple wire is energized the solenoid coils pull in and that sends power to the starter and the yellow R terminal wire.
Once you turn the key to run or any other position there should not be any power in the S terminal.
Run is ON , the position that the engine runs in as your driving down the road
Start is start or crank when the key is forced all the way against spring pressure
In the Start position the purple and the S terminal should have power.
In the On position the purple and S should not have power BUT the yellow and the R terminal should have power.
If the yellow is accidentally put on the S terminal with the purple the engine will start but the starter will remain cranking in the ON position also. Like is happening to your car.
Racer
Joined: Jan 2010
Posts: 261
Likes: 4
From: Albuquerque Resistance is not futile. It's voltage divided by current.
I changed the solenoid
our hair out when we started changing parts. That was after many
creative and exhaustive electrical checks. And yes, it was wired
correctly. Finally changed the solenoid and that fixed it.
Also worked fine off the car, had to be some sort of load induced
short in the solenoid. I believe it was an Autozone reman unit.
Hope this helps, Gary
Le Mans Master
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From: mount holly NC
2025 c3 ('74-'82) of the Year Finalist - Unmodified
2019 C3 of Year Finalist (appearance mods)
Try doing this,disconnect the purple from the S term on the solenoid,put a test light on the purple wire,turn your key to start,confirm test light lights,then release key to ON position,if light stays lit the ignition switch is bad or maladjusted,if the light goes out its something wrong with the starter.
Thread Starter
Instructor
Joined: May 2007
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I have checked the S wire and the R wire... The S wire has no voltage in the Run position and voltage in the Start position. The R wire has voltage in the run position, So I guess my starter is bad.. It works fine off car, I guess it could be a load problem. It has a new solenoid and starter has been rebuilt. I will pull starter and have it checked again. Any other suggestions
