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    #31
    looks like those fender crash sensors are the same on the 93. 2 wires and ground to body. One wire goes direct to ground, the other wire goes through the resistor to ground. There's no center one on the 93. Not sure if that center one is actually a crash sensor on yours. If it is... then yours has one more than the early aeros. The 91 towny has a center one, but it's the same as the other two (2-wire w/body ground). I'm not so sure that there's such a thing as a 4-wire crash sensor. I am finding one that uses an 8-wire connector (though it looks like the connector isn't fully populated). Is that the one you have?

    Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
    rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)

    Originally posted by gadget73
    ... and it should all work like magic and unicorns and stuff.

    Originally posted by dmccaig
    Overhead, some poor bastards are flying in airplanes.

    Comment

      #32
      If so... http://www.ebay.com/itm/F0AB-14B007-...-/161067949494

      or http://www.ebay.com/itm/NOS-Ford-Mer...aef772&vxp=mtr

      Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
      rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)

      Originally posted by gadget73
      ... and it should all work like magic and unicorns and stuff.

      Originally posted by dmccaig
      Overhead, some poor bastards are flying in airplanes.

      Comment

        #33
        Originally posted by sly View Post
        looks like those fender crash sensors are the same on the 93. 2 wires and ground to body. One wire goes direct to ground, the other wire goes through the resistor to ground. There's no center one on the 93. Not sure if that center one is actually a crash sensor on yours. If it is... then yours has one more than the early aeros. The 91 towny has a center one, but it's the same as the other two (2-wire w/body ground). I'm not so sure that there's such a thing as a 4-wire crash sensor. I am finding one that uses an 8-wire connector (though it looks like the connector isn't fully populated). Is that the one you have?
        Absolutely positive the left and right are two wire and the center is four wire.

        ford part numbers:

        F0AB-14B004-BA (left/driver)
        F0AB-14B005-BA (right/passenger)
        F0AB-14B006-BA (center)

        Ford also sold the three in a 'kit', that had a different part number than the above.
        95 DGM Impala SS, 383, LT4 cnc heads, LT4 matched intake, Holley 58 mm t/body, GM 846 cam, GMPP 1.5 rr's, F-body MAF, BH OBD I PCM, LT4 knock module, K&N cold air, Edelbrock headers, Flowmaster exhaust, BBHP #73 6-speed, 4:10 gear, sloted and drilled rotors, Z28 cluster
        96 Buick Roadmaster Limited Wagon, mostly stock
        77 Ford F150, 400M auto, longbed
        98 Suburban LS 5.7L Vortec, stock
        90 Grand Marquis, stock

        Comment

          #34
          Originally posted by sly View Post
          If so... http://www.ebay.com/itm/F0AB-14B007-...-/161067949494

          or http://www.ebay.com/itm/NOS-Ford-Mer...aef772&vxp=mtr
          Ok, it looks like those are some eight wire sensors. Their part number is F0AB-14B007-BA. Notice it says that they are a 'rear' sensor and go under the dash. So is this the 'fourth' sensor some folks on this thread are talking about?
          95 DGM Impala SS, 383, LT4 cnc heads, LT4 matched intake, Holley 58 mm t/body, GM 846 cam, GMPP 1.5 rr's, F-body MAF, BH OBD I PCM, LT4 knock module, K&N cold air, Edelbrock headers, Flowmaster exhaust, BBHP #73 6-speed, 4:10 gear, sloted and drilled rotors, Z28 cluster
          96 Buick Roadmaster Limited Wagon, mostly stock
          77 Ford F150, 400M auto, longbed
          98 Suburban LS 5.7L Vortec, stock
          90 Grand Marquis, stock

          Comment

            #35
            in that case, yeah, that's probably the safing sensor. And it looks like nobody has the center sensor listed currently. Gonna have to wait for Vic to post the diagrams from his manuals to see if one of the other sensors can be hacked in to fix the problem.

            Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
            rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)

            Originally posted by gadget73
            ... and it should all work like magic and unicorns and stuff.

            Originally posted by dmccaig
            Overhead, some poor bastards are flying in airplanes.

            Comment

              #36
              One guy on eBay has the whole 4 sensor set for $99. These are brand new in box.
              95 DGM Impala SS, 383, LT4 cnc heads, LT4 matched intake, Holley 58 mm t/body, GM 846 cam, GMPP 1.5 rr's, F-body MAF, BH OBD I PCM, LT4 knock module, K&N cold air, Edelbrock headers, Flowmaster exhaust, BBHP #73 6-speed, 4:10 gear, sloted and drilled rotors, Z28 cluster
              96 Buick Roadmaster Limited Wagon, mostly stock
              77 Ford F150, 400M auto, longbed
              98 Suburban LS 5.7L Vortec, stock
              90 Grand Marquis, stock

              Comment

                #37
                Here's what I could find in my 91 service manual and EVTM.

                First, the troubleshooting procedure for code 9, which pretty much says what has already been said in this thread.
                Click image for larger version Name: 91_Air_Bag_Troubleshooting_Code_9.jpg Views: 1 Size: 140.9 KB ID: 1278080

                The connector end views for the front crash sensors.
                Click image for larger version Name: 91_Crash_Sensors_Connector_End_Views.jpg Views: 1 Size: 50.0 KB ID: 1278081

                The connector end views for the air bag diagnostic module.
                Click image for larger version Name: 91_Air_Bag_Diagnostic_Module_C276.jpg Views: 1 Size: 98.3 KB ID: 1278082Click image for larger version Name: 91_Air_Bag_Diagnostic_Module_C277.jpg Views: 1 Size: 95.3 KB ID: 1278083

                System diagrams.
                Click image for larger version Name: 91_Air_Bag_Restraint_System_1.jpg Views: 1 Size: 102.9 KB ID: 1278084Click image for larger version Name: 91_Air_Bag_Restraint_System_2.jpg Views: 1 Size: 121.3 KB ID: 1278085

                Also, the connector end views for the safing sensor and redundant power supply (just in case).
                Click image for larger version Name: 91_Air_Bag_Redundant_Power_Supply_C2001.jpg Views: 1 Size: 55.3 KB ID: 1278086Click image for larger version Name: 91_Air_Bag_Safing_sensor_C2002.jpg Views: 1 Size: 54.6 KB ID: 1278087
                Vic

                ~ 1989 MGM LS Colony Park - Large Marge
                ~ 1998 MGM LS - new DD
                ~ 1991 MGM LS "The Scab"
                ~ 1991 MGM GS "The Ice Car"

                Comment

                  #38
                  And the component location view that shows the location of the air bag diagnostic module.
                  Click image for larger version Name: 91_Component_Location_View.jpg Views: 1 Size: 172.3 KB ID: 1278088
                  Vic

                  ~ 1989 MGM LS Colony Park - Large Marge
                  ~ 1998 MGM LS - new DD
                  ~ 1991 MGM LS "The Scab"
                  ~ 1991 MGM GS "The Ice Car"

                  Comment

                    #39
                    so for the center one, pin 619 and 620 should have resistance across them. 619 should be resistive to the case and 620 should be short to the case. the other 2 should be open.

                    Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
                    rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)

                    Originally posted by gadget73
                    ... and it should all work like magic and unicorns and stuff.

                    Originally posted by dmccaig
                    Overhead, some poor bastards are flying in airplanes.

                    Comment

                      #40
                      Spot on guys. Many thanks. I'm shopping for a center sensor!
                      95 DGM Impala SS, 383, LT4 cnc heads, LT4 matched intake, Holley 58 mm t/body, GM 846 cam, GMPP 1.5 rr's, F-body MAF, BH OBD I PCM, LT4 knock module, K&N cold air, Edelbrock headers, Flowmaster exhaust, BBHP #73 6-speed, 4:10 gear, sloted and drilled rotors, Z28 cluster
                      96 Buick Roadmaster Limited Wagon, mostly stock
                      77 Ford F150, 400M auto, longbed
                      98 Suburban LS 5.7L Vortec, stock
                      90 Grand Marquis, stock

                      Comment

                        #41
                        Guys,
                        Thanks for all the tips, etc. on the codes. I just got a center support today at local salvage yard (pristine 1991 CV is still there!!). Also picked up a nice rearview mirror. Code/light is off now.
                        95 DGM Impala SS, 383, LT4 cnc heads, LT4 matched intake, Holley 58 mm t/body, GM 846 cam, GMPP 1.5 rr's, F-body MAF, BH OBD I PCM, LT4 knock module, K&N cold air, Edelbrock headers, Flowmaster exhaust, BBHP #73 6-speed, 4:10 gear, sloted and drilled rotors, Z28 cluster
                        96 Buick Roadmaster Limited Wagon, mostly stock
                        77 Ford F150, 400M auto, longbed
                        98 Suburban LS 5.7L Vortec, stock
                        90 Grand Marquis, stock

                        Comment

                          #42
                          Awesome! Good to hear you got it all sorted out.
                          Vic

                          ~ 1989 MGM LS Colony Park - Large Marge
                          ~ 1998 MGM LS - new DD
                          ~ 1991 MGM LS "The Scab"
                          ~ 1991 MGM GS "The Ice Car"

                          Comment

                            #43

                            Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
                            rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)

                            Originally posted by gadget73
                            ... and it should all work like magic and unicorns and stuff.

                            Originally posted by dmccaig
                            Overhead, some poor bastards are flying in airplanes.

                            Comment

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