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

AOD Neutral Safety Switch

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Old Jun 3, 2019 | 04:14 PM
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AOD Neutral Safety Switch

So the wiring for my 1986 F150 4x4 w/AOD neutral safety switch got wrapped around the front drive shaft while out in heavy brush. The harness was pulled from both connections.

I broke pins off the NSS and need to replace it. However, I am not sure where the harness connects from the transmission side? Any guidance on where to look for the connection would be great.

Also, if there is a bypass or a switch I can run to bypass the NSS please shoot my the link for wired to cross. Its a beat up old ranch truck and I am good with rednecking it for this vehicle.

Thanks!
 
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Old Jun 3, 2019 | 05:09 PM
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Here's the wiring diagram. You can see connector c128 feeds the switch.

 
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Old Jun 3, 2019 | 05:09 PM
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Here is a picture of connector c128

 
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Old Jun 3, 2019 | 05:22 PM
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I don't think those diagrams are for a 1986 F150 4x4 AOD? Its got the 5.0 EFI engine.

Mostly trying to find the location of the connection for the harness on the opposite end of the NSS connection.
 
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Old Jun 3, 2019 | 05:41 PM
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Originally Posted by dakotajeep
So the wiring for my 1986 F150 4x4 w/AOD neutral safety switch got wrapped around the front drive shaft while out in heavy brush. The harness was pulled from both connections.
You sure your truck has AOD?

Pic: 7A247 is the AOD NSS

 
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Old Jun 3, 2019 | 08:06 PM
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Yes, I am sure it has the AOD tranny (not a manual and has overdrive). I know where the NSS switch is as well. I need to know where the wire goes from the NSS. The wire has a four prong connector on it but I cant find it and the wiring on this old rig is terrible.

I understand two of the wires are for the backup lights....so I dont need info on that either. Just need to find where the other connection is on the harness.

Thanks!
 
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Old Jun 3, 2019 | 08:21 PM
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Those diagrams I posted are correct for your truck.
 
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Old Jun 4, 2019 | 10:06 PM
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Still havent been able to track down the opposite connection. I wonder if it got ripped out of the harness which is why I can't find it.
 
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Old Jun 5, 2019 | 07:53 AM
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The diagram shows another connector up the line is "c121" and "c190". They say c 121 is below the junction block. C190 is at the "clutch lockout switch" which must be inside the cab. You can see c190 in the picture in post #3 above in figure 1.

C121 is shown in the picture below.

 
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Old Jun 12, 2019 | 11:09 AM
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Still no luck locating the opposite connection. Is there a simple way to bypass the NSS to get the vehicle running again?

It seems the wiring is either hidden where I cant see it or was pulled out when the wiring got wrapped around the front drive shaft.

Thanks.
 
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Old Jun 12, 2019 | 11:19 AM
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Well did find the conncetion. Located right behind the frame rail fuel pump. Plan to splice the wire and bypass the NSS.
 
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