Electrical problem, Need help!

xsimonas

New Member
Aug 4, 2019
3
0
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27
Lithuania
Hey there, i need Help.
I got an 69’ Mustang with AOD trans. But now i wanted to start the car, but just connect battery cable with battery and then it starts. The ignnition switch - off position.
If i wana shut down the car i must disconnect battery cable. I changed solenoid, new ignition switch and front wiring and have the same problem. Is there any wrong wiring or something? May can be this problem with AOD Trans neutral switch wiring, or voltage regulator?
Kind regards
 
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Jul 2, 2019
46
8
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TIFFIN, OHIO
It starts by itself? The starter solenoid must be shorted and or wired into a hot by mistake. If this we the case the starter would stay engage whenever the battery is connected. Also weird the ignition would be on without the key on.
 

xsimonas

New Member
Aug 4, 2019
3
0
1
27
Lithuania
It starts by itself? The starter solenoid must be shorted and or wired into a hot by mistake. If this we the case the starter would stay engage whenever the battery is connected. Also weird the ignition would be on without the key on.
Yes, it starts by itself.
So you think i must change a new one solenoid?
 

2Blue2

will be trying this sex one when I can find it
Mar 5, 2019
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Oahu
Does the starter stay spinning when you hook battery up? Does engine fire also? Pull coil wire when testing.
Sounds like wiring is wrong between or with the ignition switch and or solenoid
 

xsimonas

New Member
Aug 4, 2019
3
0
1
27
Lithuania
Does the starter stay spinning when you hook battery up? Does engine fire also? Pull coil wire when testing.
Sounds like wiring is wrong between or with the ignition switch and or solenoid
yep, when i plug in battery the starter start spinning and engine fire up. The starter i think spinning also with engine.
 

swooshdave

Member
Jan 1, 2008
34
13
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Portland, Oregon
I read something about the hokey ignition switch on the 67 with the accessory post. Although you have a 69 you may want to see if someone used an easier ignition switch with your car. I bet if you had a 67 and the post was accidentally connected to the starter circuit as soon as you turned on the ignition (not to the start position) the starter would fire.

93115790.jpg

67 ignition switch

93115874.jpg


69 ignition switch

This may also give you a clue where to look. If you have the 69 ignition while it may be protected better than the 67, if the starter circuit is touching the accessory circuit somewhere you may have the same effect.

See sections 07-09 at the below link.

Classic Mustang Electrical Tips and Tricks
 
Last edited:
Jul 2, 2019
46
8
18
38
TIFFIN, OHIO
I do not have knowledge on older mustangs ignitions. What starter does the engine have installed? I ran into some confusion with my first encounter with the mini torque starters. They have a constant heavy gage wire going to the starter with the solenoid on the starter itself. Older regular style starters have firewall mounted solenoid with a switched power feed going to the starter......I bought a Mustang 2 several years ago. It had a mini torque starter someone tried to wire up like a traditional starter. It ate starters until I figured out what the previous owner tried to install.
 
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