Question about 1991 Plymouth Acclaim

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Hissing from speed control servo - 1991 Plymouth Acclaim

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It is leaking vacuum replace it.

Posted on Nov 05, 2012

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My cruise control does not work on 1994 Ford 150. Fuse is fine, where to look next? Thank you


Which fuse ? There are two that supply B+ to the speed control servo ! One is located in the under hood fuse box and the other in the fuse panel inside the vehicle > The fuse may look fine but is there B+ voltage across the fuse . Check it with a volt meter . Check B+ voltage at the speed control servo , Black with yellow trace and P/O wire , what ever color that is . Is there B+ at the control switch ? The speed control servo supply's voltage to the cruise control switch . You can check it at the speed control servo as well . They could be videos on youtube showing how to test it .
Diagnose cruise control failure on 1993 Ford 150

May 31, 2017 | Ford 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).
    • Circuitry.
    • 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.
    • Is the voltage greater than 10 volts?
    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.
    • Is the voltage greater than 10 volts?
    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.
    • Is the resistance less than 5 ohms?
    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

My brake pedal will not budge, and a hissing noise present when running


The stop lights won't go out until the pedal is depressed, as there is a switch which is activated by the pedal.

A hard brake pedal is probably caused by a defective servo. The hissing noise is probably an air leak in the servo.

Switch the engine on, open the bonnet (the hood..) and see if you can locate the hissing - that'll probably be in the brake servo area.

If you don't know what a brake servo looks like here is a generic image:



26071617-5gult0ot5kkhyupfos0rfps2-1-0.jpeg

Jan 27, 2016 | 1989 GMC Sierra

2 Answers

When I turn on cruise control the light turns on but doesn't keep speed


Tera,

The light tells you that the electrics to the light are working - but cruise control in many cars relies on vacuum hoses and other mechanical and electro-mechanical components to work.

Additionally, if you have a brake or clutch issue - sensor in those sub-assembly circuits would automatically disengage the cruise control speed setting - but could leave the cruise indicator on.

May 21, 2014 | Cars & Trucks

2 Answers

Where can I locate the crank sensor on a grand caravan 3.3 lt 2001 sport


Remove battery.
Remove the battery tray.
Disconnect the speed control vacuum harness from servo.
Remove the speed control servo and bracket and reposition. Disconnect the electrical connector.
Disconnect the electrical connector from crankshaft sensor.
Remove the mounting bolt.
Remove sensor

Oct 07, 2012 | Cars & Trucks

1 Answer

Hi renault scenic 2l auto 2002. another common problem.


hissing noise is a leaking diaphram inside power brake booster.you have to replace the power brake booster.

Sep 18, 2012 | Renault Megane Cars & Trucks

1 Answer

Volvo s90 cruise control doesn't run at a constant speed


You may have a failing Cruise Control Servo. Have the servo tested by a Volvo or other qualified service center.

Apr 22, 2012 | 1998 Volvo S90

2 Answers

My cruise control does not work on my 2003 Ford Focus


Hi Fred,

There are several things that can cause your cruise control to not function. Anything from a bad speed sensor to a faulty speed control servo. It is impossible to tell you what is wrong without diagnosing your speed control system. Here is a quote from the vehicle manufacturer regarding this issue:

"Start by running speed control servo integrated self test diagnostics. The servo has integrated self test diagnostics which is a key tool in quickly and accurately diagnosing speed control system faults. Self test diagnostics are also the basis for starting speed control trouble shooting."

Please note that a diagnostic scan tool capable of accessing the speed control data is required for performing this task.

Oct 15, 2011 | 2003 Ford Focus

1 Answer

What are the compute codes 24 and 34 on a 1988 Dodge Daytona


Hello
Welcome
Code 24 is Throttle Position Sensor,

This is locared on the right side of the throtle body accross from the throtle linkage there is 2 torx screws holding in place and one wire end to disconect install reverse from instructions

code 34 Speed Control Servo Circuit. No check engine light will post.
Your cruse control servo is not turning on and off like it should.
I would do the tps first then disconect the batery for 5 minn then re check the car for codes, the tps might be messing with the speed control servo.
Let me know if i can help more!

Jul 19, 2010 | 1988 Dodge Daytona

1 Answer

Change timing belt and idle speed servo kit.


send me your e-mail so i can send to you full repair instruction and picture
mutasem2002@hotmail.com

Sep 02, 2008 | 2004 Mitsubishi Lancer

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