Diagnostic chart for cruise control
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Diagnostic chart for cruise control
Does anyone have the diagnostic pert chart for the cruise control system on a 1995 F-350 one ton crew cab dually? It should be in the electrical service manual.
My cruise control doesn't work at all. It started going intermittent and then quit completely.
My cruise control doesn't work at all. It started going intermittent and then quit completely.
Mountain Pass
Joined: Feb 2003
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I thought mine went out and would be trouble to find and repair. Mine at times worked eractic and finally stopped working altogether. A fellow member on the site pointed out it was common for the cruise control connector plug to become loose overtime. He suggested I find the very small wire-connector plug(cruise control) which is located under the steering column just down from the steering wheel, by removing the small panel (3 screws) and find the wire/connector and pressed the fm/m plugs connector firmly together. I did and.... wha la the cruise control worked. Becareful of the air bag system when working around the area.
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Thanks. I'll check that out. Thank God I don't have those stupid airbags on my truck.
I have checked the cancel switch on the master cylinder and that is no good. I have to replace it. The switch, however is not the problem as I disconnected it and the cruise control still does not work.
I checked at the Ford webpage and it stated that I was involved in the recall. However, I went to Ford and they found that I am not involved in the recall. The manager did tell me that he believes that Ford will eventually include all cars and trucks in that recall. The new cancel switch / harness apparently has a fusible link. Costs about $12.
I have checked the cancel switch on the master cylinder and that is no good. I have to replace it. The switch, however is not the problem as I disconnected it and the cruise control still does not work.
I checked at the Ford webpage and it stated that I was involved in the recall. However, I went to Ford and they found that I am not involved in the recall. The manager did tell me that he believes that Ford will eventually include all cars and trucks in that recall. The new cancel switch / harness apparently has a fusible link. Costs about $12.
Last edited by jimpeel; Oct 25, 2005 at 12:55 AM.
Lead Driver
Joined: Feb 2003
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From: Oak Harbor, OH
For $12 I'd buy it and replace it myself. You should WANT the airbags, as they are a big help in an accident. THey ususally mean the difference between a broken rib (possibly a puncutred lung) and a bruised one. There is still a sliding contact under the steering wheel, does the horn work?
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Originally Posted by pfogle
For $12 I'd buy it and replace it myself. You should WANT the airbags, as they are a big help in an accident. THey ususally mean the difference between a broken rib (possibly a puncutred lung) and a bruised one. There is still a sliding contact under the steering wheel, does the horn work?
The horn honks loud and clear. I want to pursue the connector angle first.
As to airbags, if you are leaning on the horn when you hit you can expect shattered hand or wrist bones and possibly a dislocated shoulder. In addition, you get to punch yourself in the teeth with your own hand.
Fleet Owner
Joined: Aug 2005
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From: Easton,Ks
Originally Posted by jimpeel
Does anyone have the diagnostic pert chart for the cruise control system on a 1995 F-350 one ton crew cab dually? It should be in the electrical service manual.
My cruise control doesn't work at all. It started going intermittent and then quit completely.
My cruise control doesn't work at all. It started going intermittent and then quit completely.
Possible Source(s):
Blown fuse.
Circuitry.
Stoplight switch.
Burnt stoplamp bulb.
Speed control actuator switch assembly.
Vehicle speed sensor.
Speed control servo.
Action(s) to Take: GO to «A1» .
A1 VERIFY THERE IS POWER TO SPEED CONTROL SERVO
Disconnect harness connector from the speed control servo (9C735).
Use Rotunda 73 Digital Multimeter 105-00001 or equivalent to make the specified measurements at the harness connector.
Use Rotunda Terminal Adapter Kit No. 105-00025 to avoid connector terminal damage.
With the ignition switch (11572) in RUN, measure voltage between Pin 7 (B+, Circuit 298) and Pin 10 (GND, Circuit 901).
Is there battery voltage (12v nom.)?
Yes
GO to «A3».
No
GO to «A2».
A2 CHECK MODULE GROUND CIRCUIT
With ignition switch in OFF position, measure the resistance between Pin 10 (GND, Circuit 901) and ground point on the chassis.
Is resistance less than 5 ohm?
Yes
GND is OK, power to Module may be open. Check Fuse E in Power Distribution Box and Circuit 298. TEST for normal operation. GO to «A3»
No
REPAIR open in ground Circuit 901. TEST for normal operation.
A3 CHECK FOR STUCK STOPLIGHT SWITCH
With no brakes applied, measure the voltage between Pin 4 (BRK, Circuit 306) and Pin 10 (GND, Circuit 901).
Is the battery voltage (12v nom.)?
Yes
Stoplight switch (13480) is stuck on. REPLACE stoplight switch.
No
Stoplight switch is not stuck on. GO to «A4».
A4 CHECK BRAKE/CLUTCH CIRCUIT
With the ignition switch in OFF position, measure the resistance between Pin 4 (BRK, Circuit 306) and Pin 10 (GND, Circuit 901).
Is resistance less than 20 ohms?
Yes
Brake input Circuit OK. GO to «A5».
No
Brake light bulbs blown or brake circuit open. SERVICE circuit including clutch pedal position switch (CPP) (11A152).
A5 CHECK DEACTIVATOR CIRCUIT (AT MODULE CONNECTOR)
With ignition switch in OFF position, and with no brakes applied, measure the voltage between Pin 9 (deactivator, Circuit 307) and Pin 10 (GND, Circuit 901).
Is there battery voltage (12v nom.)?
Yes
GO to «A9».
No
No power from deactivator. GO to «A6».
A6 CHECK DEACTIVATOR SWITCH (AT SWITCH)
Make sure Step A5 has been done.
Remove body harness connector from deactivator switch. Measure the resistance between the two pins of the deactivator switch with no brakes applied.
Is resistance less than 1 ohm?
Yes
Deactivator switch OK. GO to «A7».
No
Deactivator switch defective. REPLACE switch. REPEAT Step «A5».
A7 VERIFY THERE IS POWER AT DEACTIVATOR HARNESS CONNECTOR
Measure voltage between Pin 1 (Circuit 10) of the deactivator switch harness connector and chassis ground.
Is there battery voltage (12v nom.)?
Yes
Power at connector OK. GO to «A8».
No
SERVICE for blown fuse or open in deact circuit.
A8 CHECK FOR OPEN CIRCUIT BETWEEN DEACTIVATOR SWITCH AND SERVO
Measure resistance from Pin 2 (Circuit 307) of deactivator switch and Pin 9 (DEACT) (Circuit 307) of service assembly of speed control servo.
Is resistance less than 1 ohm?
Yes
REPEAT Step «A5».
No
Open in wire harness. SERVICE as required.
A9 CHECK FOR STUCK ON SWITCH
With no speed control actuator switches depressed, measure the voltage between Pin 5 (COMMAND, Circuit 151) and Pin 10 (GND, Circuit 901).
Is there battery voltage (12v nom.)?
Yes
REPLACE switch.
No
ON switch not stuck. GO to «A10».
A10 CHECK ON SWITCH OPERATION
With ignition switch in OFF position with steering wheel ON switch depressed, measure voltage between Pin 5 (COMMAND, Circuit 151) and Pin 10 (GND, Circuit 901).
Is there battery voltage (12v nom.)?
Yes
ON switch OK. GO to «A12».
No
ON switch not functioning. GO to «A11».
A11 CHECK FOR OPEN CIRCUIT IN "ON" SWITCH GROUND
Make sure Step A10 has been done.
With horn depressed, measure voltage between Pin 6 (Circuit 848) and
chassis ground.
Is there battery voltage (12V nom.)?
Yes
REPLACE ON switch.
No
Open circuit or fuse in horn relay feed or open circuit in switch ground. SERVICE as required. REPEAT Step «A10».
A12 CHECK FOR STUCK COMMAND SWITCHES
With ignition switch in OFF position and with no steering wheel switches depressed, measure the resistance between Pin 5 (COMMAND, Circuit 151) and Pin 6 (COMMAND RTN, Circuit 848).
Is resistance greater than 3k ohms?Yes
No stuck switches. GO to «A13».
No
One of the command switches is stuck. REPLACE switch.
A13 CHECK SET/ACCEL SWITCH OPERATION
With ignition switch in OFF position and with the SET/ACCEL switch depressed, measure the resistance between Pin 5 (COMMAND, Circuit 151) and Pin 6 (COMMAND RTN, Circuit 848).
Is resistance approximately 680 ohms?
Yes
Switch is OK. GO to «A14».
No, less than 640 or greater than 720 ohms
Switch not functioning. REPLACE switch.
A14 VERIFY SPEED SIGNAL
Operate vehicle by raising the rear wheels. Set speed at 30 mph. Use an AC voltmeter to measure the voltage between Pin 3 (SPEED SIG, Circuit 679) and Pin 10 (GND, Circuit 901).
Is voltage reading 4-5 volts?
Yes
Speed signal OK. GO to «A15».
No
SERVICE Programmable Speedometer/Odometer. GO to «Section 13-01A».
A15 CHECK FOR BROKEN OR BOUND ACTUATOR CABLE
Remove speed control actuator from speed control servo. Check for broken speed control actuator by pulling on speed control actuator and noting throttle movement.
Is speed control actuator OK?
Yes
REPLACE speed control servo.
No
SERVICE speed control actuator.
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