Anyone Know What These Boxes Do?

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Jun 6, 2017 | 05:27 AM

#16

gatorfor88

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Joined: Jan 2013

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From: Panama City

The one with what looks like a speaker is the "flux capacitor" and the other one holds "dilithium crystals".

Jun 6, 2017 | 08:34 AM

#17

moreratlessrod

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Joined: Sep 2016

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From: NE Indiana

Quote:

Originally Posted by NumberDummy

What "later models" are you referring to?

...

And, there is no horn relay on 1978/79 F100/350, Bronco & Econoline unless they have factory installed Speed Control.

1978/79 horn relay with Speed Control plugs into the amplifier.

OK, so in my case... My truck is a '79 F250 (originally 400 motor), I just pulled the dash a few days ago. Using the wiring diagrams from Fordification I identified what looks like the horn relay. What you're saying is that if I have a horn relay, the box it's attached to is for speed (cruise) control? The next question is: how much am I missing? How hard would it be to get it back onto the swapped 460?

Jun 6, 2017 | 09:12 AM

#18

vjsimone

Cargo Master

Joined: Jun 2013

Posts: 3,182

Likes: 15

From: Somewhere n North America

Quote:

Originally Posted by Idaho Highboy

Thanks Bill. Looked up a "Emission Throttle Position Control Actuator" and didn't realize carburetor based engines had that kind of stuff. I doubt it's doing anything that affects how the non-stock FE block performs - anyone know more about this than I do?

1980 Manual;

Jun 6, 2017 | 10:32 AM

#19

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

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From: Simi Valley, CA

Quote:

Originally Posted by moreratlessrod

OK, so in my case... My truck is a '79 F250 (originally 400 motor), I just pulled the dash a few days ago. Using the wiring diagrams from Fordification I identified what looks like the horn relay.

What you're saying is that if I have a horn relay, the box (Speed Control amplifier) it's attached to is for speed control.

The horn relay with factory installed Speed Control plugs into the Speed Control's amplifier, located on the inside of the firewall, adjacent to the fuse box and bottom of the steering column

But, if your truck does not have Speed Control (factory: the switches are in the horn pad), your truck does not have a horn relay.

Jun 6, 2017 | 10:02 PM

#20

moreratlessrod

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Joined: Sep 2016

Posts: 74

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From: NE Indiana

Quote:

Originally Posted by NumberDummy

What I know I don't have are a horn pad and anything resembling an actuator/servo on the throttle.

But I do have this:

Jun 7, 2017 | 11:56 AM

#21

Idaho Highboy

Thread Starter

Tuned

Joined: Jan 2017

Posts: 338

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From: North Idaho

Vinny, thank you for sharing the information. Looks like I have a defunct box, as my truck has an Edelbrock carburetor with no solenoids or other wires aside from the choke.

Jun 7, 2017 | 09:03 PM

#22

paredneck33

Logistics Pro

Joined: Jan 2005

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From: penn twp.

Quote:

Originally Posted by moreratlessrod

What I know I don't have are a horn pad and anything resembling an actuator/servo on the throttle.

But I do have this:

Does your truck have a stock steering wheel? Or was that swapped out too? Without more detailed photos of both the interior (steering wheel specifically) and photos under the hood it's pretty much impossible for us to tell you what else you're missing for the cruise control. Oh one other thing worth noting about the cruise control on these trucks. And I don't know how this would affect the horn relay maybe Number Dummy could she some more light here. But

also offered a dealer add on/installed cruise control. And that required a replacement of the turn signal lever for one that housed the switches to activate the cruise control.

Jun 8, 2017 | 02:45 PM

#23

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

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From: Simi Valley, CA

Quote:

Originally Posted by moreratlessrod

What I know I don't have are a horn pad

and anything resembling an actuator/servo on the throttle.

ALL 1973/79's F100/350's have a horn pad (that contains the horn switch), but only F100/350's with factory installed Speed Control have the switches within the pad.

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Jun 8, 2017 | 07:57 PM

#24

moreratlessrod

Junior User

Joined: Sep 2016

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From: NE Indiana

Stock steering wheel (I think) but no horn pad and no speed control parts under the hood.

Jul 1, 2018 | 12:05 PM

#25

bigcrunch

Tuned

Joined: May 2007

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Has anyone figured out what the below black box does? I have one on my 77 w cruise the turn signals do not work, this box looks to be wired in line with turn signal switch.
4 way flashers do work( truck tail lights flash) and when I probe the out put side of the turn signal flasher it starts to flash how ever not the truck tail lights. I have cleaned all grounds I could find.

Quote:

Originally Posted by moreratlessrod

What I know I don't have are a horn pad and anything resembling an actuator/servo on the throttle.

But I do have this:

Jul 1, 2018 | 04:58 PM

#26

1TonBasecamp

Lead Driver

Joined: Jul 2017

Posts: 9,612

Likes: 1,182

From: San Jose, CA

Well maybe NumberDummy can confirm that a D7AF-9D844-aa module is in fact a speed-controller for the CC.
That's certainly the same style of relay that Ford used for horns, but most of the ones I'd seen on other vehicles were under the hood. I like that these are mounted in a much more protected area. A surviving under-hood one is getting more and more rare these days.

I knew about the horn relay only with the CC (mine does not have either, so I wired in my own horn relay setup) all this time, but it's first time I've seen the factory install. Thanks for the pic!

Paul

Jul 1, 2018 | 05:43 PM

#27

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

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From: Simi Valley, CA

Quote:

Originally Posted by moreratlessrod

E9AZ-9D843-A (replaced D4AZ-9D843-A; D6AZ-9D843-A; D8AZ-9D843-A; EOAZ-9D843-A) .. Amplifier Assy - Use with factory installed Speed Control / Obsolete

Marked: D4AF-9D844-CA or CB or D5AA-9D844-AAor D6AA-9D844-AAor D7AF-9D844-AA ^^ or D9AF-9D844-BA or EOAF-9D844-AA

1974/79 FoMoCo Passenger Cars / 1975/88 F100/350 / 1975/91 Econoline / 1978/88 Bronco / 1983/88 Ranger / 1984/88 Bronco II / 1986/88 Aerostar / 1988/91 Crown Victoria/Grand Marquis/Town Car.

Jul 1, 2018 | 07:08 PM

#28

bigcrunch

Tuned

Joined: May 2007

Posts: 429

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The newer E9AZ are backwards compatible to D6AA ?? thanks all for the help. This box I suspect of being the cause of no turn lights. all bulbs are good, flasher is good, cleaned all grounds....

Jul 1, 2018 | 07:18 PM

#29

NumberDummy

Ford Parts Specialist

Joined: Nov 2006

Posts: 88,826

Likes: 787

From: Simi Valley, CA

Quote:

Originally Posted by bigcrunch

The newer E9AZ are backwards compatible to D6AA ?? thanks all for the help. This box I suspect of being the cause of no turn lights. all bulbs are good, flasher is good, cleaned all grounds....

E9AZ-9D843-A replaced EOAZ-9D843-A that replaced D8AZ-9D843-A that replaced D6AZ-9D843-A that replaced D4AZ-9D843-A

D6AZ-9D843-A was marked D6AA-9D844-AA

FoMoCo is infamous for updating/replacing 10's of 1,000's of part numbers EVERY

YEAR .. almost as often as women change their minds!

It was a PITA back then and still is today.

Jul 1, 2018 | 08:53 PM

#30

bigcrunch

Tuned

Joined: May 2007

Posts: 429

Likes: 2

dohhhh, there is good reason why my wife has no key to the work shop. thanks for the help I may scourer the JY for a 80's vehicle for one and try it hope at worst a fuse goes south.