Question about 1993 Ford Mustang

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Converiable top switch will not retract?

I have a 92 mustang convert. Recently the switch for my top will only work when closing the top, but when I try and open the top up nothing happens? I can hear the motor when I go to close the top but not when I am trying to open it?

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Although the problem cut be an open in one of the wires, most likely it is the switch itself.
It is a double post-double throw switch that could be easily and inexpensively replaced.
Make a numbered label or use colored tape for each wire and make sure they are secured to the wires. Make a drawing that shows which terminal each wire goes to.
Cut the wires close to the switch. If the reversing switch is externally wired you will see that there are two wires that form an X connected to the outside terminals; the new switch will have to be wired the same way.
Take the switch to an auto parts store and tell them you want a double post-double throw switch with the same or greater amperage.
Try to get one with screw terminal, or 1/4" blade connectors[for which you will need to crimp 1/4 female blade connectors on the wires] or you will have to solder the wires back to the sw.
If your old switch isn't externally wired you will need to ask the parts place or an electrician how to wire a reversing switch.

Posted on Jan 08, 2009


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05 mustang open/close,makes clicking sound.2 relays,fuse,switch checked,new motor/hydraulics.Are there other relays,open close sensors? Top works UP when grounded externally, but not DOWN.

Principles of Operation
Convertible top operation is controlled by the smart junction box (SJB). When the convertible top raise/lower switch is operated, the SJB commands the front and rear windows to the full down position. Window operation is disabled while the convertible top raise/lower switch is being operated. When the SJB receives a full down input for both rear windows, it commands the appropriate relay closed to raise or lower the convertible top. If the SJB does not receive a full down input signal for both rear windows, convertible top operation is disabled.
The convertible top assembly is a floating frame, Z-fold design. The main pivot brackets are attached to the body, and the convertible top frame side rails expand or fold when the convertible top is raised or lowered. The LH and RH stay pads are attached to the convertible top frame bows, and provide the main source of tension for the convertible top material. When the convertible top is in the full down position, it stores in the compartment behind the rear seat backrest. When the convertible top is in the full up position, the body provides a stop which the convertible top frame number 5 bow contacts to provide a weather seal for the convertible top against the body.
The convertible top hydraulic system uses a 12-volt reversible pump and motor assembly. When active, the pump uses hydraulic pressure to extend the hydraulic lift cylinders to raise the convertible top, or retract the hydraulic lift cylinders to lower the convertible top. The convertible top motor/pump assembly is equipped with a thermal circuit breaker. The circuit breaker typically resets after 5 minutes depending on the ambient temperature. The thermal circuit breaker cannot be repaired and must be installed as a unit with the motor/pump assembly. In the event of a hydraulic system failure, the convertible top cannot be operated manually.

  1. Verify the customer concern.
  1. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart Mechanical Electrical
  • Convertible top brackets and frame
  • Hydraulic motor and pump
  • Hydraulic lift cylinders
  • Hydraulic lines
  • Bussed electrical center (BEC) fuse(s):
    • 13 (40A)
    • 51 (10A)
  • Circuitry
  • Convertible top switch
  • Smart junction box (SJB)
  • BEC
  • Convertible top raise relay
  • Convertible top lower relay
  • Left or right rear power window motor

  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the cause is not visually evident, connect the diagnostic tool to the data link connector (DLC) and select the vehicle to be tested from the diagnostic tool menu. If the diagnostic tool does not communicate with the vehicle:
    • check that the program card is correctly installed.
    • check the connections to the vehicle.
    • check the ignition switch position.
  1. If the diagnostic tool still does not communicate with the vehicle, refer to the diagnostic tool operating manual.
  1. Carry out the diagnostic tool data link test. If the diagnostic tool responds with:
    • SCP or ISO circuit fault; all electronic control units no response/not equipped, refer to Section 418-00 .
    • No response/not equipped for SJB; refer to Section 419-10 .
    • System passed, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out self-test diagnostics for the smart junction box (SJB).
  1. If the DTCs retrieved are related to the concern, go to the Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index.
  1. If no DTCs related to the concern are retrieved, GO to Symptom Chart .
  2. do you know what DTC'S - diagnostic trouble codes are ?
  3. Smart Junction Box (SJB) Diagnostic Trouble Code (DTC) Index DTC Description Source Action B1141 Convertible Top Full Down Position Switch Circuit Failure SJB Go To Pinpoint Test E . B1142 Convertible Top Full Up Position Switch Circuit Failure SJB Go To Pinpoint Test E . B1402 Driver Power Window Down Switch Circuit Failure SJB Go To Pinpoint Test A . B2068 Convertible Top Up Output Circuit Failure SJB Go To Pinpoint Test A . B2069 Convertible Top Down Output Circuit Failure SJB Go To Pinpoint Test A . B2481 Convertible Top Up/Down Switch Fault SJB Go To Pinpoint Test A . B2578 Passenger Power Window Down Switch Circuit Failure SJB Go To Pinpoint Test A . All other DTCs - SJB REFER to Section 419-10 . Your best bet , take it to a qualified repair shop , before you short out the smart junction box .
  4. $336.54 then 300 bucks to program at ford

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