Non-Mopar Question (Sons 68 Mustang)

[milit73]

I know guys it is not a mopar but my son loves his mustang. Many of you might have read the story but anyways I am having a little problem with the ignition.

First there is a toggle switch to start the car. If you turn the key to start the start position it does nothing but once you press the toggle it starts fine no problems. So i replaced the ignition switch and took the toggle out of the loop and as soon as you turn the key to the ACC or go to start the car it continues to keep the starter engaged. It will keep going until you turn the key back to the Off position.

I am not sure what to do next plus I am not sure if someone altered any of the other wires (looked but did not see anything that jumped out at me). I ordered a colored wiring diagram to make things easier but thought I would ask you mopar guys first. Thanks for any help

 

[Rick@Laysons]

Sounds like the starter solenoid needs to be replaced.

 

[68GTX440]

If the only thing you did was replace the switch and remove the toggle this is where I would look first.
I hope these help a little?

 

[bigmanjbmopar]

Sounds like either your new switch is not the correct one or you wired it wrong or it was wired wrong when the toggle went in. Try to cross the starter relay with a screw driver with the key in the on position. does it start and run or just crank?

Jump the two relay terminals with a long wrench or screwdriver.

 

[milit73]

Sounds like either your new switch is not the correct one or you wired it wrong or it was wired wrong when the toggle went in. Try to cross the starter relay with a screw driver with the key in the on position. does it start and run or just crank?

Jump the two relay terminals with a long wrench or screwdriver.

It will crank and start but the starter stays engaged. The only wiring I could see that was "tied" into was where the toggle was installed (not by me). If I take the toggle out and reattch the wire (only one wire) as soon as I turn the key to either the left or right the starter engages and continues until I turn the key to the off position. With the toggle in place and wired everything works fine but I just want it to work with the key.

I hope that I am explaining this correctly. Should I try this with the key off jumping the solenoid.
Thanks again

 

[bigmanjbmopar]

Looking at your wiring diagram, under the dash at the ignition switch there should be a green with a red stripe wire at the switch, it would make sense for someone to intercept this and put it on a toggle for whatever reason. Confirm this is there and it should connect to the ignition switch itself not go anywhere else or be connected to anything else, sounds like you are putting constant voltage to the starter via the relay meaning constant voltage is going to the relay and keeping it energised so the starter just keeps going instead of just getting a quick bump.


You may have a case of someone wired up the original ignition switch incorrectly and instead of fixing it right just installed a toggle. Follow the diagram for the switch, if the print is too small let me know I can blow it up and customize to for better viewing.

 

[milit73]

Looking at your wiring diagram, under the dash at the ignition switch there should be a green with a red stripe wire at the switch, it would make sense for someone to intercept this and put it on a toggle for whatever reason. Confirm this is there and it should connect to the ignition switch itself not go anywhere else or be connected to anything else, sounds like you are putting constant voltage to the starter via the relay meaning constant voltage is going to the relay and keeping it energised so the starter just keeps going instead of just getting a quick bump.


You may have a case of someone wired up the original ignition switch incorrectly and instead of fixing it right just installed a toggle. Follow the diagram for the switch, if the print is too small let me know I can blow it up and customize to for better viewing.

Yep that is the wire that the toggle is tied into and looks be be wired correctly otherwise. When I installed the new switch everything else looked good but I could have missed something. I will recheck as I am not as limber as I used to be trying to look under a dash

 

[68GTX440]

Try this start it up then disconnect the Red with Blue tracer wire at the solenoid and see if the starter stops spinning. If it does your problem is in the wiring at the switch..

To help test you can put a light on this wire and start checking everything under the dash until you find the problem. When the light goes out you have found the problem.

 

[HT413]

The ignition switch has a run circuit and a start circuit. Sounds like they have been combined, so even in run the starter is getting juice to the solenoid.

 

[milit73]

Ok so it is not the starter solenoid as I replaced it today and it does the same thing. I took another look under the dash and found some electrical tape in the area of that wiring that I did not see before (how I missed it I don't know) that I will take a closer look at this weekend. Again thanks for the help with the non-mopar

 

[PlumcrazyRR]

I have to agree with what most on here are saying. Check your wiring to your ignition switch. I had a similar rigged up toggle switch on my RR ignition when I bought it and was having issues. I had to completely re-wire it after I took it out because those geniuses did a number on it. After I got the wires going where they were supposed to, it was all good and cranked like it should.

 

[bigmanjbmopar]

Experience from being one of those dumb numb nuts as a teen lol and have owned a 68 cougar back then helps lol glad ur getting close feels good to make it right doesn't it?

 

[milit73]

Electrical problems are my biggest weakness not that I am great at other things but love turning a wrench. This is one of the things that my son asked me about and for some reason it really bugs him, ok me also.

Now if I could get that damn Trans pan from leaking I would be much happier. Going to buy a new pan as this one is a little beat up but should work just not for me.

 

[383man]

The ignition switch has a run circuit and a start circuit. Sounds like they have been combined, so even in run the starter is getting juice to the solenoid.

This is right. Someone has tapped into the start wire to the start solenoid for some reason and what happens is when the key is turned to run the 12 volt key on voltage will backfeed back through the wire someone has wrong and it backfeeds 12 volts to the start wire to the solenoid and then it cranks when the key is turned to run. Its like someone trying to bypass the ballast resistor when cranking by taking a wire and running it from the starter solenoid that feeds the solenoid when cranking over to the coil. Then instead of it sending 12 volts to the coil when cranking what happens is when the key is turned to run before you even get to crank it the volts going through the resitor will go to the wire you tapped from the starter solenoid and run from the ballast where it was tapped in to the solenoid and make the car crank in the ign run posostion and even if its only 7 to 8 volts from the resistor it will pull the fendewell mounted solenoid plunger in and crank.
I know thats not what you or hopefully no one did but it sounds like that type of problem. You will have to check the wire to the starter solenoid real close first. Ron