Ok, I was convinced that all wires on my '87 should attatch to the bat side of the SS except of course the starter wire and the ignition trip wire on the small "s" post. Some of us had a prior discussion about this when trying to help me when I was frying sOlenoids. Well, I replaced the engine a few weeks ago and was looking through the Haynes manual and lo and behold, I see that in the 1984-1986 series truck with the duraspark ignition there looks to be a second wire coming off the sOlenoid. It is a pink/black wire with a blue fuseable link. In the Haynes Manual it is on page 12-31. It is somehow connected to the fuel system, the fuel pump cutoff relay, the oil pressure switch and all sorts of things. It looks as though it's supposed to hook to the other small terminal on the sOlenoid. Anyone have any ideas about this? I don't think its supposed to hook to the starter cable terminal, but it still wonders me what this wire is for and how it works. There is current to the wire during starting if that helps anyone with some ideas.

I luv these smiley guys.
TonyG

 

[updated:LAST EDITED ON 08-May-02 AT 03:04 PM (EST)]It says it goes to the inertia switch.
The other side of the inertia switch goes to a yellow > Then Blue wire to the SSas shown here.

http://www.clubfte.com/users/mil1ion/86truckss.JPG

http://www.clubfte.com/users/mil1ion/86Inertia.JPG
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Million,
That is the diagram for the TFI module distributor on page 12-29 of my Haynes manual. If you also have a Haynes, turn the page to 12-31 and you'll see the diagram for the duraspark type ignition. It has different wiring of the sOlenoid than the TFI module. How do you (I) post scans and pics in these Message boards? Do I have to become a member?..

Tony

 

[updated:LAST EDITED ON 08-May-02 AT 03:38 PM (EST)]Actually,
The top photo is from Page 12-30 and the bottom is from 12-31.

For the 87 :
Looking on the top right corner of page 12-35 it doesn't show any reference to this wire coming from the SS.
But on page 12-40 & 12-41 on the right side of page halfway down it shows it again going to the inertia switch.

The inertia switch should be under the dash on the passenger side.




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Dennis,
In the middle left of page my page 12-31 (It might be 12-32 in your book) is the duraspark distributor and starter relay diagram (mines a 1996 copywrite book if that makes a diff) The starter relay diagram is different from the TFI module. Your top diagram is on page 12-29 in my book and the bottom one is on page 12-30. So our books are a little different. But the wire I'm talking about does go to an inertia switch in the duraspark ignition system also, but it hooks to the starter sOlenoid (getting that spelling right ) at the small post (it looks that way to me) Also note the diagram on page 12-29 is for 300-6 and 351 motors... at least the distributor area is listed that way.
Thanks,
Later, Tony

 

Mine is Copyright 94.

Here is the page 12-32 diagram

http://www.clubfte.com/users/mil1ion/861232.JPG

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Yep Dennis,
That's the diagram. Notice how the pink/black wire with a blue fuseable link comes off the Starter solenoid. It looks almost to me that this circut is suppose put power to the fuel pumps to allow you to start the vehicle and over-ride an open inertia switch, but then the open inertia switch will cut the engine off after the key is released to the "run" position. Is that what it looks like to you?

When I replaced the motor, I put a new starter on the engine and also put 2 gauge (+) cables (with soldered on copper endes) to the solenoid and down to the starter. I also sanded off the paint behind the solenoid and added a star washer and dielectric grease to seal out corrosion. I havn't had any problems since the new motor, but I'm still holding my fingers crossed. I'll have to stop in at the garage sometime and have them do a amp draw test on the new starter. The old one was drawing (100? amp?) or was it 10amp? too much. And I think I had worked a dead spot on the armature.

Any input on this pink/black wire would be good. I don't think this contributed to my frying solenoids, but I'm not an electrical engineer and don't know things they know either.

Tony

 

>Yep Dennis,
>That's the diagram. Notice how the pink/black wire with a
>blue fuseable link comes off the Starter solenoid. It looks
>almost to me that this circut is suppose put power to the
>fuel pumps to allow you to start the vehicle and over-ride
>an open inertia switch, but then the open inertia switch
>will cut the engine off after the key is released to the
>"run" position. Is that what it looks like to you?
>
>>Tony

Further thought are that this circuit might be to allow you to test your fuel system for leaks and line breaks after a crash or a bumper bender that would trigger the inertia switch.??


What do ya think? Should I put it back over the Starter motor side or the "other" terminal. Anyone have a pic of a stock '87 Carbed 460 Starter solenoid that they'd want to share?

Tony

 

What I was told about Fuel delivery systems and Interia switches is that they are Ground actuated,not power actuated.
Maybe we need verification for this.

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http://www.clubfte.com/users/mil1ion/87fuel.JPG

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64-Fairlane500 S/C waiting for a 390-4spd.
68-Mustang 289-Sunlit Gold 80,892Mi
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Just to the left of the fuel cutoff relay that you show is the inertia switch that we're talking about. It looks to get current direct from the positive side of the solenoid (blue fuse link/yellow wire) and then go through the normally closed? inertia switch. (assuming NC and NO mean normally closed and normally open? ) The "normally open" oil pressure switch closes and provides current to the fuel pump relay/solenoid when oil pressure is present. This current in turn activates the relay to send current that is coming through the NC inertia "safety" switch and on to the fuel pump's, selector valve and selector switch (in the dual tank option.) It sure does look like there is supposed to be a wire either on the other small terminal or else on the starter cable terminal of the starter solenoid in this particular duraspark application.

I guess if I put it over and it starts and then shuts off, I'll know to either check the inertia switch or the pink/black resister wire that comes from the starter relay. I guess by leaving it on the positive terminal I would be defeating the oil pressure saftey switch and the inertia safety switch that work in conjunction with the fuel pump relay.

Thanks for the interaction.
Tony

 

Even more further thoughts. It seems as though this wire coming from the starter side of the solenoid would be to bypass the low oil pressure cutoff switch and provide fuel and fuel pump activity during startup when the oil pressure isn't up yet. Sound logical??? Time for bed.
Tony

 

I think you hit on it during your last post. There is no oil pressure when starting the motor, so this solenoid circuit primes the fuel system till the engine gets going and builds oil pressure.

The inertia switch is normally closed. All it has in it is a pendulum that will swing up and break the fuel pump circuit during an accident. Sometimes during fender benders or rough off roading they will trip and need to be reset.