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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

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Old Aug 17, 2009 | 09:56 PM
  #31  
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I did find a pic,you can see the red wire laying on the engine perch right behind the power steering pump.I haven't looked too closely at the wire,but there's a possibility it has a blue line.I'll find out for sure tomorrow.

 
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Old Aug 18, 2009 | 02:30 AM
  #32  
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Originally Posted by ctubutis
Shaun,
If you look at these diagrams, you'll see all the colors of all the wires are listed
for you. For example, looking at 81-f-150's diagram, look at C-1019, the
elusive NSS. Notice it has two wires connecting to it, both R/LB (red with a
light blue stripe) and they each belong to Circuit #32.

On your starter solenoid - as is also shown in these diagrams - is a R/LB /
Circuit #32 wire; turning the key switch to START energizes that wire and,
therefore, the solenoid, which, in turn, supplies power to the starter motor. The
NSS keeps power from being applied to the solenoid.
Actually, Connector C-1019 has four wires. It's overly complicated and very easy to get confused because of the way Ford Designed the Diagrams.

If you look at the "Back-up lamp switch" for the auto transmission, on ctubutis's scans, you will see the Purple/Orange hash wire, and the Black/Pink wire. Both at C-1019.

If you look at the "Gear Shift Neutral Switch", on my scans, you will see both (2) Red/Lt. Blue stripe wires, also at C-1019.

That equals the 4 wires at C-1019. The "Backup lamp switch" and the "Gear Shift Neutral switch" are one single component. The NSS. But it's listed and marked seperately and in different sections on the diagrams.

Hopefully this makes scence.
 
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Old Aug 18, 2009 | 02:37 AM
  #33  
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Originally Posted by fordtruckman80
I did find a pic,you can see the red wire laying on the engine perch right behind the power steering pump.I haven't looked too closely at the wire,but there's a possibility it has a blue line.I'll find out for sure tomorrow.
It might be Red/Lt. Green stripe. Same as the one on the + side of the coil. If so it's most likely for the radio interference capacitor for the coil. The diagram I posted also has the coil and wires listed in the diagram.

Confirm the color and the stripe.
 
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Old Aug 18, 2009 | 07:19 PM
  #34  
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Originally Posted by 81-F-150-Explorer
It might be Red/Lt. Green stripe. Same as the one on the + side of the coil. If so it's most likely for the radio interference capacitor for the coil. The diagram I posted also has the coil and wires listed in the diagram.

Confirm the color and the stripe.
It's actually Red/Yellow Hash.

I'm real stumped on this.I'm gonna go out and pull the NSS again tomorrow and see if I can find a part number.If it doesn't have a Ford part number,will that mean it's aftermarket?Did Ford even put part numbers on the NSS?

I really appreciate the help ya'll,especially for scanning all the diagrams for me...It's really appreciated.
 
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Old Aug 18, 2009 | 08:29 PM
  #35  
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Originally Posted by fordtruckman80
It's actually Red/Yellow Hash.
Ok, I'm going to look at the diagrams and report back what I find about Red/Yellow Hash wire.

I'm real stumped on this.I'm gonna go out and pull the NSS again tomorrow and see if I can find a part number.If it doesn't have a Ford part number,will that mean it's aftermarket?Did Ford even put part numbers on the NSS?
Ford didn't really put part numbers on any of their parts. They did have a habit though of putting engineering numbers on parts. The engineering number can be decoded back to the actual part number in most cases.

If it's stamped Ford, it's original or a factory replacement. But for what application. That's the thing.

I really appreciate the help ya'll,especially for scanning all the diagrams for me...It's really appreciated.
You are welcome.
 
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Old Aug 18, 2009 | 08:40 PM
  #36  
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Circut #640: Red/Yellow Hash Wire

Hooks into Ignition switch via fuse Panel (F-2) and the Red/Lt Green Wire. Hot in Run only.

For Throttle position Solenoid Actuator, and Throttle Emission control Solenoid.

Basicly an anti dieseling preventitive measure. Closes the throttle plates when you shut the truck off, to prevent dieseling. Your Truck is probably missing them both now.
 
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Old Aug 18, 2009 | 09:07 PM
  #37  
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Originally Posted by 81-F-150-Explorer
Circut #640: Red/Yellow Hash Wire

Hooks into Ignition switch via fuse Panel (F-2) and the Red/Lt Green Wire. Hot in Run only.

For Throttle position Solenoid Actuator, and Throttle Emission control Solenoid.

Basicly an anti dieseling preventitive measure. Closes the throttle plates when you shut the truck off, to prevent dieseling. Your Truck is probably missing them both now.
Would those be on the carb?There's a round thing on the side of the carb that's unplugged.
 
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Old Aug 18, 2009 | 09:44 PM
  #38  
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Originally Posted by fordtruckman80
Would those be on the carb?There's a round thing on the side of the carb that's unplugged.
Your big, round thing is probably your automatic choke adjustment. Can you
post close-up pix of your carb?
 
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Old Aug 18, 2009 | 09:59 PM
  #39  
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Originally Posted by ctubutis
Your big, round thing is probably your automatic choke adjustment. Can you
post close-up pix of your carb?
I'll get out there and do it tomorrow.I don't think I have close ups of it...

The closest thing I have is from when I removed the manifolds.Actually,you can see the circle thing and wire i'm talkin bout in the pic.It's facing upwards(towards you when you look at the picture).

 
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Old Aug 19, 2009 | 01:23 PM
  #40  
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Originally Posted by fordtruckman80
Would those be on the carb?There's a round thing on the side of the carb that's unplugged.

...

The closest thing I have is from when I removed the manifolds.Actually,you can see the circle thing and wire i'm talkin bout in the pic.It's facing upwards(towards you when you look at the picture).
That would be it, yes.
 
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Old Aug 19, 2009 | 06:44 PM
  #41  
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Originally Posted by 81-F-150-Explorer
That would be it, yes.
Okay,so does my red/yellow hash wire hook up to that?

You mentioned that the wire went to two separate devices.I have the one in the pic,so what about the other?Do certain trucks have one,and other trucks have another?I took close ups of my carb today,i'll try to get them up in a bit...

I'm sorry for all the questions.Would you happen to have a diagram of my carb with these two devices on it?
 
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Old Aug 19, 2009 | 07:43 PM
  #42  
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Yes the wire hooks up to that. And yes, some trucks had one, or the other, or both, or neither.

As for the diagram of the carb. I do have one but it does not show that solenoid. It's more of a internal exploded diagram. It covers both Carter YF and Carter YFA Non-Feedback and Feedback type.
 
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Old Aug 19, 2009 | 08:30 PM
  #43  
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Originally Posted by 81-F-150-Explorer
Yes the wire hooks up to that. And yes, some trucks had one, or the other, or both, or neither.

As for the diagram of the carb. I do have one but it does not show that solenoid. It's more of a internal exploded diagram. It covers both Carter YF and Carter YFA Non-Feedback and Feedback type.
Okay,thanks.One question about the connection,I noticed the wire coming from the throttle solenoid is black,why is that?Shouldn't it be red/yellow hash?

BTW,i'm glad you mentioned the whole YF YFA feedback thing.I've searched for an answer,but nothing really makes the difference clear to me.So,what's the difference between the YF and YFA,and how can I tell if I have a Feedback or Non-Feedback?Aren't the Non-Feedback carbs the older style?Once again,I really appreciate all the help man.
 
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Old Aug 19, 2009 | 09:29 PM
  #44  
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Originally Posted by fordtruckman80
Okay,thanks.One question about the connection,I noticed the wire coming from the throttle solenoid is black,why is that?Shouldn't it be red/yellow hash?
That's normal. It's because the solenoid has different applications, and uses.

BTW,i'm glad you mentioned the whole YF YFA feedback thing.I've searched for an answer,but nothing really makes the difference clear to me.So,what's the difference between the YF and YFA,and how can I tell if I have a Feedback or Non-Feedback?Aren't the Non-Feedback carbs the older style?Once again,I really appreciate all the help man.
Here is a diagram for the Carter YFA-Feedback type.


Your carb is the Non-Feedback type. Yes they are the older style. Yours does not have the Feedback solenoid as in the diagram. Etc... Also of note where the dashpot is in the above diagram, your emission solenoid is placed on yours.

Each year could have 5 different carbs or calibrations just on the 1980 4.9L alone.
 
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Old Aug 19, 2009 | 09:49 PM
  #45  
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Originally Posted by 81-F-150-Explorer
That's normal. It's because the solenoid has different applications, and uses.



Here is a diagram for the Carter YFA-Feedback type.
....

Your carb is the Non-Feedback type. Yes they are the older style. Yours does not have the Feedback solenoid as in the diagram. Etc... Also of note where the dashpot is in the above diagram, your emission solenoid is placed on yours.

Each year could have 5 different carbs or calibrations just on the 1980 4.9L alone.
Okay,so does that mean the YF is a non-feedback carb,and the YFA is a feedback carb?
 
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