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Starting to tackle…………..

Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Shops, Barns, Varmints, and Trucks
Forum Description: anything you want to talk about except politics
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=207476
Printed Date: 18 Jul 2025 at 12:05am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com


Topic: Starting to tackle…………..
Posted By: Lars(wi)
Subject: Starting to tackle…………..
Date Posted: 15 Jul 2025 at 6:30pm
The issues on our ‘91 F350 diesel, we acquired back in October.
First, the turn signal stalk is very sloppy, along with the tilt steering bearings. It’s my understanding the electrical power for the signals, and running lights runs thru the signal mechanism? Also the cruise control will not turn on, supposedly this condition ‘may’ be caused by this same worn out mechanism? And related to the cruise control, there is a fault light indicator displaying ‘Rear Antilock’.

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I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.



Replies:
Posted By: steve(ill)
Date Posted: 15 Jul 2025 at 6:50pm
It is called the MULTI FUNCTION SWITCH... and controls the turn signals, flashers and wipers / washer...... if it is loose or worn out, it is possible to effect the cruse.

Anti lock brakes normally have a speed sensor in the rear pumpkin and each from wheel.. I have had that rear sensor get gummed up with metalic dust / crud floating in the "old worn out gear lube" that does not allow it to count bull gear teeth properly.. Also possible the sensor just crapped out... Dont cost much and easy to change.


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Like them all, but love the "B"s.


Posted By: steve(ill)
Date Posted: 15 Jul 2025 at 6:53pm
i think when you turn the key ON, the computer runs a continuity test to the rear and front ABS sensors to see that they are connected ( and wires good).. after a few seconds the light goes OUT... telling you the WIRES and SENSOR have a complete circuit... Put in gear and start moving.. after you get above 5 MPH if the light comes back ON, then the computer does not see the SIGNAL from the back.. Sensor failed or covered with metal powder so it cant COUNT TEETH..

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Like them all, but love the "B"s.


Posted By: Hubert (Ga)engine7
Date Posted: 15 Jul 2025 at 6:58pm
A sloppy steering column will cause problems with anything that is controlled by anything on the steering wheel or turn signal/high beam stalk, shouldn’t mess with the rear antilock though. Best bet may be replacing the whole column. 

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Just an old country boy saved by the grace of God.


Posted By: Lars(wi)
Date Posted: 15 Jul 2025 at 7:27pm
The ‘Rear Antilock’ lights comes on with the ignition, and stays on after starting. It’s very possible the sensor is shot, the truck has 131,000 miles on the odometer. This old girl has the high beam button on the floor, the wiper controls are a knob on the dash, the radio controls are actually on the radio!! WOO HOO!!!

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I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.


Posted By: steve(ill)
Date Posted: 15 Jul 2025 at 8:52pm
yep... your right.. The 1991 was OLD SCHOOL... Multi Function switch went in the F series in 1992..

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Like them all, but love the "B"s.


Posted By: DMiller
Date Posted: 16 Jul 2025 at 6:26am
Ford is notorious for Mid year Changes, depends of Month of 91 build.

Rear Antilock on Pre 2000 Ford 250s was done with a Differential Ring Gear sensor, my own 99 is that way.


Posted By: Lars(wi)
Date Posted: 16 Jul 2025 at 1:25pm
08/90 is the month of build.

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I tried to follow the science, but it was not there. I then followed the money, and that’s where I found the science.



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