• 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
Neutral safety switch
#11
(07-06-2019, 12:35 PM)I’m Don C Wrote: The NSS mounts on the shift linkage on the side of the transmission. This thread and other links in it should help
https://www.7173mustangs.com/thread-neut...tch--32140
Another problem arose. The car started fine from the key cylinder but when I went to turn it off the car kept running...with the ignition off and the keys out. I disconnected the battery and it continued to run. I finally had to disconnect the main lead to the distributor. I know there has to be some wiring wrong on the solenoid. I have the big yellow wire hooked up to the battery side of the ignition coil. Is this correct?
  Reply
#12
Another problem arose. The car started fine from the key cylinder but when I went to turn it off the car kept running...with the ignition off and the keys out. I disconnected the battery and it continued to run. I finally had to disconnect the main lead to the distributor. I know there has to be some wiring wrong on the solenoid. I have the big yellow wire hooked up to the battery side of the ignition
  Reply
#13
The wire that connects to the positive side of the coil and comes from the ignition switch is red with a light green stripe, and runs through the ballast (resistor) wire. As you learned, you cannot run the ignition coil directly from the battery, as long as the engine runs the alternator produces electricity, the alternator connects directly to that yellow wire.

If you have points, whenever the engine is not running and the points are closed, the coil will constantly be energized, quickly discharging the battery and overheating the coil. If you have an aftermarket electronic ignition you risk damaging it, also.

If you're going to do work an your car and do your own wiring you're going to have to learn how to wire a car and read wiring diagrams. You're going to need the shop manuals for your car. You can download the wiring diagram for your car under the Mustang Data tab at the upper right of this page.

You can get a wiring tutorial here
https://www.7173mustangs.com/thread-how-...#pid336055



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
#14
Thank you Don, you’ve been very helpful. I will try and study the tutorial. Somebody on another post said the starter solenoid using HEI distributor should be wired like this which is the way I wired mine.


Big solid yellow wire - front stud of starter solenoid, along with BATT (+) cable
Light green red stripe - radio condensor (leave disconnected if you don't have one)
Red with green stripe - "I" terminal of starter solenoid
Red with light blue stripe- "S" terminal of starter soleoid
White with black stripe - Alternator "STA" terminal to "S" on the regulator connector
  Reply
#15
What is the ignition coil connected to? In post #11 you said it is connected to the yellow (main power feed) wire.

That wiring sounds correct, IF you do not have factory gauges. You can see the variations of how the alternator is wired here
https://www.7173mustangs.com/thread-alte...#pid320622



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
#16
Sorry, I meant the big yellow wire from the factory harness (has a fusible link) is connected to the battery side of the solenoid. I have the wire coming from the distributor connected to the S terminal of the solenoid. Sorry, I’m horrible with wiring.
  Reply
#17
The S terminal on the starter solenoid only has 12 volts applied to it when the ignition switch is in the start position. The solenoid is an electrically activated heavy duty switch that then connects the battery to the starter. It is a momentary switch that disengages as soon as the ignition switch is released from the start position and the S terminal no longer has 12 volts on it.

The S terminal will not supply 12 volts to your ignition coil. It has zero volts until the ignition switch is turned to start.

For a stock 12 volt ignition system the voltage to the coil is reduced to approximately 8 volts by a ballast resistor, which for our cars is a short section of resistor wire between the ignition switch and the ignition coil. The purpose of this voltage reduction is to reduce sparking of the ignition points when they open and close. This sparking causes the contacts to erode, and the lower voltage greatly extends the life of the points.

Some aftermarket electronic distributors,or distributer modules, require 12 volts for both the distributor and coil, some for just the distributor and leave the coil at the reduced voltage, others run on reduced voltage.



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
[+] 1 user Likes Don C's post
  Reply
#18
Well I went out this morning thinking the ignition switch was faulty and replaced it with a known good one. It started just fine but when I tried to shut the car off it continued to run with the key out. Here’s a few pictures of my solenoid, distributor and where I spliced into the red with blue striped wire. Here’s what’s hooked up to the solenoid. I was able to move my fuel pump wire and connect it to the white with black striped wire since it had power only in the run position. I have my single wire alternator wire connected to the battery.


Big solid yellow wire - front stud of starter solenoid, along with BATT (+) cable
Light green red stripe - radio condensor (leave disconnected if you don't have one)
Red with green stripe - "I" terminal of starter solenoid
Red with light blue stripe- "S" terminal of starter soleoid
White with black stripe - Alternator "STA" terminal to "S" on the regulator connector
[Image: 07-EAB10-E-56-BF-494-C-8-A41-0779-D7-B813-B8.jpg]

[Image: F9-F1-D57-A-04-A9-47-E9-9-E06-04-A2-DD5-C1-FC0.jpg]

[Image: 995-EB666-0814-42-FA-9979-D25-FE6-A7-E803.jpg]

image upload
  Reply
#19
Finally figured it out. Thanks for all the advice. I couldn’t have done it without you!
  Reply
#20
Good job, perseverance usually wins out Smile



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
Share Thread:  


Possibly Related Threads…
Thread Author Replies Views Last Post
  Fan switch part number John J 1 337 08-27-2019, 02:34 AM
Last Post: secluff
  Replacing ignition switch DeereFanatic 8 609 08-17-2019, 05:52 AM
Last Post: Aus73Mach1
  Scott Drake turn signal switch bluto72 4 534 02-15-2019, 07:30 PM
Last Post: bluto72
  vacumn line and thermal switch naa10104 3 664 07-09-2018, 07:04 PM
Last Post: naa10104
  Neutral safety switch location jowens1126 9 863 07-08-2018, 11:56 AM
Last Post: jowens1126
  Neutral Safety Switch mudbilly 18 1,648 07-03-2018, 05:08 PM
Last Post: mudbilly
  Wiper Switch Removal mudbilly 8 911 05-25-2018, 07:07 PM
Last Post: mudbilly
  Transmission Neutral Safety Switch CJ MACH 1 2 767 03-18-2018, 09:36 AM
Last Post: c9zx



Users browsing this thread: 1 Guest(s)