Yea it's just my luck. While I have you here my speedometer hasn't worked since I bought the truck and the abs light has been on the whole time as well. I read into it and many people said it could be the wiring or the speed sensor. Do you know of any other reasons as to why the speedometer wouldn't work?
Speedometer not working plus ABS light
- Thread starter Dinkleman
- Start date
Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.
Seabronc
New member
Wires, speed sensor, corroded connector, PSOM . A quote from another thread:
The rear sensor is for the ABS if you unplug it the ABS light will come on immediately . The sensor for the speedometer is in the tranny if its an automatic . That sensor is very important because it does affect shifting its signal goes too a PSOM programable speedometer odometer module mounted behind the dash to the left of the glovebox . That signal is also run to the EEC which controls the shifting . On a manual transmission Im not sure where that speed sensor is they may use the rear one double duty . In a post of mine way back I listed a link to a place that was making a bracket and a special yoke for the T Case to mount a speed sensor there just for that reason . Ill have to look to see if I can find the link . All the trucks from 92 up have no speedometer cable there all electric .
I am going to split this from this thread and start another topic for you.
>-
The rear sensor is for the ABS if you unplug it the ABS light will come on immediately . The sensor for the speedometer is in the tranny if its an automatic . That sensor is very important because it does affect shifting its signal goes too a PSOM programable speedometer odometer module mounted behind the dash to the left of the glovebox . That signal is also run to the EEC which controls the shifting . On a manual transmission Im not sure where that speed sensor is they may use the rear one double duty . In a post of mine way back I listed a link to a place that was making a bracket and a special yoke for the T Case to mount a speed sensor there just for that reason . Ill have to look to see if I can find the link . All the trucks from 92 up have no speedometer cable there all electric .
I am going to split this from this thread and start another topic for you.
>-
Seabronc
New member
Please add your truck vitals to your signiture file. That will get you more accurate responses for future problems or even this one.
>-
>-
Yo D,
here are some Links for you;
96 Bronco-F-Series Workshop Manual (PARTIAL) by FORD via
http://www.diesel-dave.com/vehic/manual/stj/stjleft.htm
Same as most earlier years especially 92-96, excepts for OBD II in 96, 4WABS (93-96); ABS (87-92); Air Bag (94-96); 3 ***** Automatic Locking Hubs (Built from May 95 through 96); Spark Plug Wire Routing & Firing Order (The firing order for 1987-1993 5.0Ls is 1-5-4-2-6-3-7-8. The firing order for 1994- 96 5.0Ls & all 5.8Ls is 1-3-7-2-6-5-4-8.);
2-piece Spindle Rolling Diaphragm Seal (RDS) used on 5/95 to 96 Broncos & F Series 1/2-ton 4WD
and a few other items that I still need to research
Section 07-05: Transmission, Automatic, External Controls
1996 F-150, F-250, F-350 F-Super Duty and Bronco Workshop Manual
REMOVAL AND INSTALLATION
Gearshift Lever and Housing
http://www.diesel-dave.com/vehic/manual/stj/stj75010.htm
Transmission Control Indicator Light (TCIL) & Switch/Cap Replacement in 92-96 E4OD; It is easy to replace & under $12.00 from local Ford dealer or a FSB Sponsor; Jeff's; be ready to catch the switch/LED assy when prying it off; it is spring loaded..not much force.
Test for 4WABS Codes;
4WABS Self Test & Test Connector Diagram, Component Locations, DTCs, 93-96; USE THIS PROCESS! "...The 4WABS TEST Connector is red; located at the left-hand side (driver's side) of the engine compartment and marked ANTI-LOCK TEST; Light Flash Technique 1. Note: If 12V test light is not available, the amber ABS warning light also flashes during this test. Locate test connector in the engine compartment and install 12V test light between Pins C and E. 2. With the ignition off, jumper Pin E to B. 3. Turn key to RUN position. 4. Remove jumper between Pins E and B after 5 seconds. 5. Count light flashes of test light or amber ABS warning light..." read more; miesk5 Note; for all Resistance tests, battery needs to be disconnected; remove Negative cable at battery
Source: by Steve http://www.supermotors.net/registry/media/255501_1
GL!
here are some Links for you;
96 Bronco-F-Series Workshop Manual (PARTIAL) by FORD via
http://www.diesel-dave.com/vehic/manual/stj/stjleft.htm
Same as most earlier years especially 92-96, excepts for OBD II in 96, 4WABS (93-96); ABS (87-92); Air Bag (94-96); 3 ***** Automatic Locking Hubs (Built from May 95 through 96); Spark Plug Wire Routing & Firing Order (The firing order for 1987-1993 5.0Ls is 1-5-4-2-6-3-7-8. The firing order for 1994- 96 5.0Ls & all 5.8Ls is 1-3-7-2-6-5-4-8.);
2-piece Spindle Rolling Diaphragm Seal (RDS) used on 5/95 to 96 Broncos & F Series 1/2-ton 4WD
and a few other items that I still need to research
Section 07-05: Transmission, Automatic, External Controls
1996 F-150, F-250, F-350 F-Super Duty and Bronco Workshop Manual
REMOVAL AND INSTALLATION
Gearshift Lever and Housing
http://www.diesel-dave.com/vehic/manual/stj/stj75010.htm
Transmission Control Indicator Light (TCIL) & Switch/Cap Replacement in 92-96 E4OD; It is easy to replace & under $12.00 from local Ford dealer or a FSB Sponsor; Jeff's; be ready to catch the switch/LED assy when prying it off; it is spring loaded..not much force.
Test for 4WABS Codes;
4WABS Self Test & Test Connector Diagram, Component Locations, DTCs, 93-96; USE THIS PROCESS! "...The 4WABS TEST Connector is red; located at the left-hand side (driver's side) of the engine compartment and marked ANTI-LOCK TEST; Light Flash Technique 1. Note: If 12V test light is not available, the amber ABS warning light also flashes during this test. Locate test connector in the engine compartment and install 12V test light between Pins C and E. 2. With the ignition off, jumper Pin E to B. 3. Turn key to RUN position. 4. Remove jumper between Pins E and B after 5 seconds. 5. Count light flashes of test light or amber ABS warning light..." read more; miesk5 Note; for all Resistance tests, battery needs to be disconnected; remove Negative cable at battery
Source: by Steve http://www.supermotors.net/registry/media/255501_1
GL!
Yo,
I hit reply too soon..
Speedometer
Is transmission shifting ok?
This problem could be caused by a # of things;
bad vehicle speed sensor (VSS) (also called ABS or DSS sensor) on the 8.8 (rear differential)/ or Connector/corroded wires inside connector;
or cruddy/damaged tone ring in the 8.8.
bad 4WABS Module - It is located below ws wiper fluid/coolant recovery tank. So, the connector can be corroded by leaking fluid or the 2 microprocessors could be toasted.
bad PSOM (Speedo)
bad wiring/shorts /connectors from VSS at firewall, at 4WABS Module and /or at PSOM and then onto the PCM
The locations of the connectors along the path from VSS to 4WABS and up to Instr Cluster & PSOM are;
C404 VSS On rear axle sensor (A7) Terminals: 02
C205 LH rear of engine compartment, in safety wall (Fire Wall) Terminals: 24 In-Line
C202F & M LH rear of engine compartment, in safety wall (A8) Terminal: 7 In-Line
C119 LH front corner of engine compartment on 4WABS control module (E10),Terminals: 40
O/LB to:
C202F & M LH rear of engine compartment, in safety wall (A8) Terminal: 7 In-Line
C252 Programmable Speedometer/Odometer Module (PSOM), Behind top LH side of I/P, on PSOM (A7) Terminal: 12 Color: B at Pins 4
LG/Y to Splice S107 Engine control sensor harness, from C119 near T/O to G101 (G101 RH side of Radiator support); to PSOM Pin 5
C202 F and M
and spliced to Ground G100 (BK)
G100 & G104 (tied together in diagram) G100 @ LH front of engine compartment, on upper radiator support
G100 Serves Component:
Fuel Pump Module
Inertia Fuel Shutoff
Misfire Sensor
Misfire Sensor Shield
Output Shaft Speed (OSS) Sensor
Powertrain Control Module (PCM), 5.0L
G200 Behind bottom of RH cowl panel
Serves Component:
Air Bag Diagnostic Monitor
Electronic Shift Control Module
Instrument Cluster
Programmable Speedometer/Odometer Module (PSOM)
Remote/Keyless Entry Module
Speed Control Servo/Amplifier Assembly
From PSOM Pin 7 (GY/BK) to Splice S246 Main harness, near T/O to speed control amplifier to
C185 PK/O @ PCM 5.0L Powertrain Control Module (PCM) LH side of safety wall, on powertrain control module (PCM) (C10) Terminal: 104 Color: GY
C185, 5.8L Powertrain Control Module (PCM) LH side of safety wall, on powertrain control module (PCM) (C10) Terminal: 104 Color: GY
C185 @PCM to C202 F and M
and on to C185 @ PCM PIN 58 (GY/BK) and from Pin 46 to MLPS (TR) Pin 2
Verify PCM & MLPS wiring & Pin numbers using WIRING DIAGRAM by MIKEY
Speed Input Signal Test @ PSOM in 93-96 Bronco; "...NOTE: Only wiring harness end of connector is to be probed. * Connect Rotunda Digital Volt-Ohmmeter 014-00407 or equivalent to Pin 4 (speed in ) and Pin 5 (speed in -). * Does the voltage increase smoothly and continuously from 0 to approximately 3.5 volts as vehicle speed increases from 0 to 48 km/h (0 to 30 mph)? OR: If available, a frequency counter may be connected to Pin 4 (Speed in ) and Pin 5 (Speed in -). Does the displayed frequency of the signal increase smoothly and continuously from 0 to approximately 667 Hz at approximately 48 km/h (30 mph)? OR: * If neither a voltmeter nor frequency counter is available, vehicle speed control may be used as a good indicator. If it works normally, then the speedometer module is at least receiving a speed input signal and the wiring and sensor & tone ring can be assumed to be good.
This is tuff to do; suggest using str8 pins to back probe the connector
Read More @ http://www.fullsizebronco.com/forum/21-noobie-bronco-tech-questions-flame-free-zone/201477-help-shifting-speedometer.html
========
Try a Self Test for Diagnostic Trouble Codes (DTC)s by my pal, BroncoJoe19
http://broncozone.com/topic/14269-code-reader/?pid=74587&mode=threaded
The engine temperature must be greater than 50° F for the Key On Engine Off (KOEO) Self-Test and greater than 180° F for the Key On Engine Running (KOER) Self-Test.
Run it around to heat the engine up and shift thru all gears incl Reverse. Then turn off all accessories/lights, etc.
Make sure A/C is off and transmission is in Park (automatic) or in Neutral for a Manual & release clutch.
Do Key On Engine Off (KOEO) portion first.
And Post them here according to:
KOEO
&
KOER
I hit reply too soon..
Speedometer
Is transmission shifting ok?
This problem could be caused by a # of things;
bad vehicle speed sensor (VSS) (also called ABS or DSS sensor) on the 8.8 (rear differential)/ or Connector/corroded wires inside connector;
or cruddy/damaged tone ring in the 8.8.
bad 4WABS Module - It is located below ws wiper fluid/coolant recovery tank. So, the connector can be corroded by leaking fluid or the 2 microprocessors could be toasted.
bad PSOM (Speedo)
bad wiring/shorts /connectors from VSS at firewall, at 4WABS Module and /or at PSOM and then onto the PCM
The locations of the connectors along the path from VSS to 4WABS and up to Instr Cluster & PSOM are;
C404 VSS On rear axle sensor (A7) Terminals: 02
C205 LH rear of engine compartment, in safety wall (Fire Wall) Terminals: 24 In-Line
C202F & M LH rear of engine compartment, in safety wall (A8) Terminal: 7 In-Line
C119 LH front corner of engine compartment on 4WABS control module (E10),Terminals: 40
O/LB to:
C202F & M LH rear of engine compartment, in safety wall (A8) Terminal: 7 In-Line
C252 Programmable Speedometer/Odometer Module (PSOM), Behind top LH side of I/P, on PSOM (A7) Terminal: 12 Color: B at Pins 4
LG/Y to Splice S107 Engine control sensor harness, from C119 near T/O to G101 (G101 RH side of Radiator support); to PSOM Pin 5
C202 F and M
and spliced to Ground G100 (BK)
G100 & G104 (tied together in diagram) G100 @ LH front of engine compartment, on upper radiator support
G100 Serves Component:
Fuel Pump Module
Inertia Fuel Shutoff
Misfire Sensor
Misfire Sensor Shield
Output Shaft Speed (OSS) Sensor
Powertrain Control Module (PCM), 5.0L
G200 Behind bottom of RH cowl panel
Serves Component:
Air Bag Diagnostic Monitor
Electronic Shift Control Module
Instrument Cluster
Programmable Speedometer/Odometer Module (PSOM)
Remote/Keyless Entry Module
Speed Control Servo/Amplifier Assembly
From PSOM Pin 7 (GY/BK) to Splice S246 Main harness, near T/O to speed control amplifier to
C185 PK/O @ PCM 5.0L Powertrain Control Module (PCM) LH side of safety wall, on powertrain control module (PCM) (C10) Terminal: 104 Color: GY
C185, 5.8L Powertrain Control Module (PCM) LH side of safety wall, on powertrain control module (PCM) (C10) Terminal: 104 Color: GY
C185 @PCM to C202 F and M
and on to C185 @ PCM PIN 58 (GY/BK) and from Pin 46 to MLPS (TR) Pin 2
Verify PCM & MLPS wiring & Pin numbers using WIRING DIAGRAM by MIKEY
Speed Input Signal Test @ PSOM in 93-96 Bronco; "...NOTE: Only wiring harness end of connector is to be probed. * Connect Rotunda Digital Volt-Ohmmeter 014-00407 or equivalent to Pin 4 (speed in ) and Pin 5 (speed in -). * Does the voltage increase smoothly and continuously from 0 to approximately 3.5 volts as vehicle speed increases from 0 to 48 km/h (0 to 30 mph)? OR: If available, a frequency counter may be connected to Pin 4 (Speed in ) and Pin 5 (Speed in -). Does the displayed frequency of the signal increase smoothly and continuously from 0 to approximately 667 Hz at approximately 48 km/h (30 mph)? OR: * If neither a voltmeter nor frequency counter is available, vehicle speed control may be used as a good indicator. If it works normally, then the speedometer module is at least receiving a speed input signal and the wiring and sensor & tone ring can be assumed to be good.
This is tuff to do; suggest using str8 pins to back probe the connector
Read More @ http://www.fullsizebronco.com/forum/21-noobie-bronco-tech-questions-flame-free-zone/201477-help-shifting-speedometer.html
========
Try a Self Test for Diagnostic Trouble Codes (DTC)s by my pal, BroncoJoe19
http://broncozone.com/topic/14269-code-reader/?pid=74587&mode=threaded
The engine temperature must be greater than 50° F for the Key On Engine Off (KOEO) Self-Test and greater than 180° F for the Key On Engine Running (KOER) Self-Test.
Run it around to heat the engine up and shift thru all gears incl Reverse. Then turn off all accessories/lights, etc.
Make sure A/C is off and transmission is in Park (automatic) or in Neutral for a Manual & release clutch.
Do Key On Engine Off (KOEO) portion first.
And Post them here according to:
KOEO
&
KOER
