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cruise control relay

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Old Jun 3, 2010 | 10:39 PM
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poocher pup's Avatar
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cruise control relay

where is the cruise control/horn relay on a '87 f-250 xlt lariart 6.9l with tilt wheel. i know its under the dash, what i need to know is more exactly where under the dash it is located. thanks in advance for any help with this matter.
 
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Old Jun 4, 2010 | 03:38 PM
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look guys i don't want to make anyone mad but this post gets hits just no help. even if you don't have the answer can anyone direct me to someone , other than a ford dealer, than would have a better idea than having to chase wires. again thanks if you can help
 
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Old Jun 4, 2010 | 04:06 PM
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I looked at my EVTM manual for a '92 F-series, there is no cruise relay on it. I do not know how much different your '87 is from mine. What problem are you trying to resolve?
 
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Old Jun 4, 2010 | 04:13 PM
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I did a little more searching and found this:

Bronco F-150 thru F-350, E-150 thru E-350 and Super F Series
The horn relay is use on vehicles equipped with speed control and is located under the left side of the instrument panel, left of the steering column and is mounted on the outboard attaching screw of the speed control amplifier module.



I hope that helps you out.
 
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Old Jun 4, 2010 | 04:14 PM
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I cant really help cause the 6.9 is a diesel and the only SPEED CONTROL im aware of Ford having back then was vacuum operated. Unless Ford put a vacuum pump on their engine (again im not sure) I couldnt tell you. If someone around here knows theyll show up. Just give it some time.
 
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Old Jun 4, 2010 | 04:34 PM
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From: Easton,Ks
No there was never a Speed Control Relay.
Just the amp as pointed out in the image above.

Here is a diagram of the system:


/
 
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Old Jun 4, 2010 | 04:45 PM
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My problem was the Speed pick up that mounts at the Speedo cable where it connects into the tranny (Not to be confused w/ the VSS mounted on the Diff, which on your truck is specific to Rabs function). Takes about $56. and 2 minutes to change. I tested the switches, fuses, individual components & replaced the VSS on the diff (for a separate RABS problem) to no avail first.
 
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Old Jun 4, 2010 | 05:35 PM
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thank you rla2005 that is what i needed to know. to you other guys this relay powers both the cruise control and horns, and since neither of mine works that was the next thing to check. again thanks to you all.
 
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Old Jun 4, 2010 | 05:40 PM
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All in a day's work

Glad we could help!
 
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Old Jun 4, 2010 | 05:47 PM
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From the 1980/89 Ford Light Truck Parts Catalog:

E7TZ13853A .. Horn Relay (Motorcraft HB124) / Use w/Speed Control only / Obsolete

Fits: 1987/88 F150/350, F(Super Duty), Bronco & Econoline / There is no horn relay listed for 1989. (The horn relay used w/speed control only in 1976/86 is different [D6TZ13853A-Motorcraft HB112]).

If y'all need one a these, there are dozens still available from Ford Dealers, obsolete parts vendors.

Here's a partial list:

WESLEY OBSOLETE PARTS in Liberty KY has ONE = 606-787-5293.

GRAYSON FORD in Grayson KY has ONE.

KINSEL L/M in Beaumont TX has EIGHT = 800-816-2894.

GREEN SALES CO. in Cincinnati OH has FIVE = 800-543-4959.

PARTS INTERNATIONAL in Farmers Branch TX has FOURTEEN = 888-727-0418.
 
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Old Jun 4, 2010 | 06:05 PM
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Is this to say that hitting your horn will deactivate C/C? Good idea, but is that true? Or am I just reading into this.
 
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Old Jun 4, 2010 | 06:15 PM
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What he is trying to say is that the power for the buttons on the wheel are supplied by power coming through the coil of the horn relay.
Look at the diagram I posted above.
 
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Old Jun 4, 2010 | 06:30 PM
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Originally Posted by subford
What he is trying to say is that the power for the buttons on the wheel are supplied by power coming through the coil of the horn relay.
Look at the diagram I posted above.
I see now. Still a good idea, if you have to hit your horn it's reasonable to assume that disengaging cruise control might be a good thing!
 
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Old Jun 4, 2010 | 06:33 PM
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From: Easton,Ks
I do not think honking the horn will turn off the Speed Control. At least the diagram does not say so.
 
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Old Jun 4, 2010 | 06:40 PM
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Originally Posted by subford
I do not think honking the horn will turn off the Speed Control. At least the diagram does not say so.
I agree! just though the "idea" kinda made sense.
 
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