Question about 2004 Ford F150

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F 150 SPEED CONTROL

Speed control quit

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  • yadayada
    yadayada May 11, 2010

    does the horn function?

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If truck has a floor shifter, replace shift interlock switch. On trucks built before
5/04, this part was defective. There is a Tsb out on this issue. If you can put truck in drive without pressing brake, this is your problem. It is common among the 1st units of the new body style. I am not impressed with the quality of this truck. Looks like it may be time for a Tundra.
Thanks Dan Ziegler

Posted on Jan 11, 2009

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1 Answer

Which fuse controls the speed control and the 4WD engage? I assume they are on the same fuse since they quit working at the same time. This is a 2006 RAM 1500.


Year make and model helps. Older vehicles have a fuse for cruise/speed control, but not for 4X4. Newer ones have a fuse for 4X4, but not cruise. If are talking speedometer/speed sensor, The PCM/ECM is what controls them.

Dec 17, 2016 | Cars & Trucks

1 Answer

2002 f150 cruise inop shows code 3?


  • 3 flashes - deactivator switch is open or circuit defective.
    • Flash code 3 - deactivator switch circuit failure
    • Central junction box (CJB) fuse 13 (20A).
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    • Deactivator switch.
    • Speed control servo.
    • Go To Pinpoint Test H .
    PINPOINT TEST H: FLASH CODE 3 - DEACTIVATOR SWITCH CIRCUIT FAILURE
  • CONDITIONS DETAILS/RESULTS/ACTIONS H1 CHECK THE DEACTIVATOR SWITCH CIRCUITRY
    Speed Control Servo C122
    Measure the voltage between the speed control servo C122 pin 9, circuit 307 (BK/YE), harness side and the speed control servo C122 pin 10, circuit 57 (BK), harness side.
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    Yes INSTALL a new speed control servo. REFER to Speed Control Servo in this section. REPEAT the self-test.

    No GO to H2 . H2 CHECK DEACTIVATOR SWITCH POWER
    Deactivator Switch C1025
    Measure the voltage between the deactivator switch C1025, circuit 10 (LG/RD), harness side and ground.
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    Yes GO to H3 .

    No REPAIR the circuit. REPEAT the self-test. H3 CHECK CIRCUIT 307 (BK/YE) FOR AN OPEN Measure the resistance between the speed control servo C122 pin 9, circuit 307 (BK/YE), harness side and the deactivator switch C1025, circuit 307 (BK/YE), harness side.
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    Yes INSTALL a new deactivator switch. REFER to Speed Control Deactivator Switch in this section. REPEAT the self-test.

    No REPAIR the circuit. REPEAT the self-test.

Nov 23, 2016 | 2002 Ford F-150

1 Answer

I'm driving in rain, wipers working good, all of a sudden they quit! I drive for 15 min, check again, they work for a while, then quit again...what in the problem?


If your not familiar with automotive electronics an module control of components , I suggest you take it to the dealer . They have the tools to diagnose this type problem !
The Wiper/Washer System consists of the following components:
?€¢
Windshield wiper/washer switch


?€¢
Body control module (BCM)


?€¢
Wiper PCB relay


?€¢
Wiper high PCB relay


?€¢
Windshield wiper motor


?€¢
Windshield washer fluid pump


?€¢
Windshield washer fluid level switch


?€¢
WPR fuse 25 A


?€¢
WSW fuse 10 A


Low Speed Operation
When the wiper switch is in the low speed position, ground is applied through the switch internal resistor and the wiper switch low signal circuit to the body control module (BCM). In response to this signal, the BCM energizes the WIPER PCB relay by applying battery voltage through the wiper relay control circuit to the coil side of the relay. This allows battery positive voltage from the WPR fuse to flow through the switch input side of the WIPER PCB relay and out to the switch input side of the WIPER HIGH PCB relay. Since the wiper high relay is de-energized and its switch contacts are normally closed to the low speed control circuit of the windshield wiper motor, the motor will operate at low speed.
High Speed Operation When the wiper switch is in the high speed position, ground is applied through the windshield wiper switch high signal circuit to the body control module (BCM) indicating the wiper high speed request. In response to this signal, the BCM then energizes the wiper PCB relay, as stated above, and the wiper high PCB relay by applying ground through the control circuit to the coil side of the relay. With the wiper high relay energized and its switch contacts closed to the high speed control circuit of the wiper motor, the motor will operate at high speed.
Wiper motor high speed operation and the wiper high speed PCB relay can also be commanded ON/OFF by using a scan tool. Refer to Control Module References.
DTC B3715 02: Front Wiper Relay Drive Circuit Short to Ground
DTC B3875 00: Wiper High Speed Relay Circuit
DTC B3922 00: Front Wiper Function Select Circuit
You could Have a switch problem , BCM problem ,PCB relay problem , the pcb relays are non serviceable an the whole under hood fuse box would need to be replaced . Malfunctioning motor bad ground some where etc.....

Dec 20, 2015 | 2008 Chevrolet Impala

1 Answer

Code 15 on 1988 ram 150 without vehicle speed sensor


Code 15 relates to a failure in the vehicle speed sensor circuit. The job of the vehicle speed sensor is to inform the computer about the speed of the vehicle so the computer can calculate engine load and prepare the engine idle speed control system while the vehicle is decelerating. On deceleration, the idle speed control system will allow additional air flow into the engine as the vehicle rolls to a stop. Usually code 15 will be accompanied by erratic speedometer readings (or no reading), erratic AT gear shifting, TCC lockup clutch instability, and intermittent or complete failure of the cruise control.

Oct 21, 2013 | 1999 Dodge Ram

1 Answer

What would cause it to work one day and not the next(cruise control) and where is the speed sensor located


I don't have any advice on the cruise control, it would have to be checked out.
The same speed sensor on the transmission handles the cruise control and the speedometer. If it fails, the speedo would quit working and the check engine light would come on.

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1 Answer

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1 Answer

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This is likely due to a defective blower motor speed control resistor. The part is located near the blower motor.

Jul 27, 2012 | 2006 Ford F-150

1 Answer

Transmisson is shifting hard and speedometer quit working 1993 f 150 4x4 300 in line 6


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yes boot coil ,spark plug whitch ever needs to be repair to stop idle air control code idle air control is trying to compensate and con not

Jul 03, 2009 | Ford F-150 Cars & Trucks

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