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SELF TEST - COMPREHENSIVE & Connector Location pics, Bronco & Ford; miesk5 NOTE, The self-test plugs were mounted on the passenger side fender on 1985-86 EFI trucks; The self-test plugs are located along the driver's side fender behind the air filter box on 1987-95 EFI trucks
http://broncozone.com/topic/14269-code-reader/
Post any codes found here.

Ok did the KOER, on demand and continuous memory tests.
111 x2 for on demand
111 x2 for Continuous
111 for KOER
 

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Jax,
Check fuses;
Erratic/Hard Shifting Due to Short Circuits, Common Locations TSB 95-02-11 in 94-95 Bronco & Trucks (Also happened in our 96 w/E4OD); Miesk5 NOTE; See: C. & D. Erratic/Hard Shifting
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net http://www.supermotors.net/vehicles/registry/media/470456_1

See C
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That's all I can offer, other than what I have already posted for you and 3eggshell.
Some other last ditch tests could be the Throttle Position Sensor (TPS) & Vehicle Speed Sensor (VSS) , but they would show other symptoms & DTCs if bad.
Throttle Position Sensor (TPS) Function & Diagnosis TSB 94-26-4 for 93-95; DTC 121,122,123, 124, 125, OBD II Code P0122 & P0123
Source: by Ford via miesk5 at http://home.comcast.net/~miesk5/technical_service_bulletins.htm#technical_service_bulletins.htm

DTC 452 Erratic Harsh Shift; PSOM Operates Correctly, OD light blinks in a 95; "...test the other sensor and it is way out of wack 1855Ohms. So this has to be the problem. Tomorrow I will replace it with a new one from the ford dealer..."
Source: by miesk5 and JRose 89 at http://broncozone.com/forums/index.php?showtopic=18456
 

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Now that I have he tests done I'm convinced more than ever that the low range button has something to do with it. I took a good long look at the wiring under the dash and other than the addition of some "plug" which was easily removed, the wiring looks unmolested. Neither the dash indicator bulb for the low range nor the "dot " next to the switch light up when depressed as it does for the 4x4 button on the same switch. I need to determine if there is a specific fuse or relay for the "low range" and go from there. Thanks for all your time and effort, I'll look into the TSB. I assume that means technical service bulletin?
 

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Now that I have he tests done I'm convinced more than ever that the low range button has something to do with it. I took a good long look at the wiring under the dash and other than the addition of some "plug" which was easily removed, the wiring looks unmolested. Neither the dash indicator bulb for the low range nor the "dot " next to the switch light up when depressed as it does for the 4x4 button on the same switch. I need to determine if there is a specific fuse or relay for the "low range" and go from there. Thanks for all your time and effort, I'll look into the TSB. I assume that means technical service bulletin?

ok;
yw, glad to help as many helped me thru the years
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yes TSB = technical service bulletin
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Due to ext. Slow Conn speeds thnx to Comcast; it will take me 3 mins to go back & see what I mentioned re the Xfer case, etc.; so bear w/me if if ramble on and state sos.

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1356 Electric Shift Troubleshooting & Repair - BEST PROCESS!
Source: by Ford via Steve83 (Steve, That dirty old truck) at http://www.supermotors.net/registry/media/724137

1356 Electric Shift Wiring Diagram in a 93
Source: by Steve83 (Steve, That dirty old truck) at http://www.supermotors.net/vehicles/registry/media/172140
see Check Lamps

To check the lamps, turn the ignition on and ground C4 and C5. The lamps should light. etc.
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No Range Shift

If the vehicle won't shift into 4L, check the speed sensor and the transmission interlocks (neutral or clutch in). Also check the 4L switch (C3) to see if the module is getting a signal. Be sure to check for corroded connections. It may seem strange to say this, but you should ask the owner/operator if this was the first time the vehicle was ever shifted into 4L. Many vehicles are purchased and operated for considerable periods of time before a shift to 4L is made. The problem may be a defective part that was there from the beginning.

If the vehicle is brought to the shop in 4L with the report that it won't shift back to 4H, your first check is to follow the proper sequence of being stopped and having the vehicle in neutral (or clutch in) when pushing the switch. If this doesn't do the trick, check the 4L switch and the motor position sensor. etc.

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So, I selected excerpts from above troubleshooting just to show that those are the common checks; see the Fuse #'s for fuses to ck iaw the troubleshooting & wiring diagram; see you owner's guide or inside cab's fise block cover for confirmation of fuse # to check
 

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93 speedo work now and then

When my speedo stops working the transmissin hits real hard up or down. The speedo problem is intermintent. Soetimes it works and sometimes it dont. Trying to figure out the speedo issue. Replaced the abs senser on the rear diff but that didn't solve the problem.
 

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When my speedo stops working the transmissin hits real hard up or down. The speedo problem is intermintent. Soetimes it works and sometimes it dont. Trying to figure out the speedo issue. Replaced the abs senser on the rear diff but that didn't solve the problem.
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yo!
There are abour 4 connectors from the ABS Sensor on the 8.8 thru the 4WABS Control Module & then up to da PSOM (Speedo/odometer) and then to the EEC/Cruise Control/ Overhead Console. Is the Amber ABS Light lit all da time?

some tips;

PSOM Continuity Test Through 4WABS Control Module Connector in 93-96; "...jumper 14 to 21, & 39 to 22..." MIESK5 NOTE; See diagram. I did this on our 96; The 4WABS Control Module was toasted; 2 yard 4WABS Control Modules were also bad; NO RETURNS!
Source: by Steve83 (Steve, That dirty old truck) at FSB


4WABS Connectors Diagrams for 93-96
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net


Wiring Diagram in 96 (similar to 92-95) & CHECK SPEED INPUT SIGNAL Test
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net


4WABS Component Locations; "...> Anti-Lock Hydraulic Control Unit (2C215) located in the front of the engine compartment on the left frame rail. > Anti-lock brake electronic control module located in the engine compartment behind the driver's side headlamp on a bracket mounted on the surface of the plastic fender apron. > Two front brake anti-lock sensors (2C204) are attached to the suspension knuckles. The front brake anti-lock sensor indicators (2C182) are pressed onto the backside of the rotors. > Rear axle speed sensor integrated into the rear axle housing. > Acceleration sensor attached to the left frame rail under the driver. > Stoplight switch (13480) located at the brake pedal (2455). > Main relay (14N089) located in the power distribution box. > Pump motor relay located in the power distribution box. > System diode located in the relay box mounted behind the power distribution box with the main relay. > Fuses for system power and the pump motor are both located in the power distribution box..."
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net

4WABS Control Module PN Label F37A-2C018-BB pic in a 93 Bronco. "...NOT for 94-96 Bronco"
Source: by Steve83 (Steve, That dirty old truck) at SuperMotors.net

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or;
VSS Tone Ring Damage pics in a 95 8.8
Source: by sackman9975 at http://www.supermotors.net/registry/19344/67582
Tone Ring Inspection; "Take off the rear diff cover. Check the Ring Tone gear. It is located on the left hand side of the ring gear. Look to see if any of the teeth have been notched (from debris floating around in the diff.) Usually a spider gear. If the ring tone gear has been notched, it will need to be replaced to fix your speedo reading. Jack it up and rotate the tires to look for the teeth to be notched/broken/bent..."
Source: by Bighibbi at http://fullsizebronco.com/forum/showthread.php?t=59278&highlight=tone+ring

Pointer Waiver TSB 96-21-11 for 92-96; "...The speedometer needle may waver and/or a light surge may occur on some vehicles when speed control is used at highway speeds between 80-113 km/h (50-70 mph). This may be due to slight dents/chips in either the exciter ring or the Vehicle Speed Sensor (VSS) and air gaps between the VSS and the exciter ring..."
Source: by Ford via miesk5 at http://home.comcast.net/~miesk5/tec...tm#PSOM Pointer Waiver TSB 96-21-11 for 92-96

Fuse E Blown, ABS Light On, Back-Up Lamps Inoperative, DRLs Inoperative, MIL On, Speedometer Inoperative TSB 95-02-11 for 92-95 Bronco & F Series
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
 

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If and when I ever need to rebuild my E4OD, it will be a Suncoast rebuild. In the end, they are the best that I have found and have the most improvements. Don't forget that the torque converter could be causing the issue as well and it should be changed out at the same time with a beefier one, especially if you are running high HP or oversize tires.

Pap


http://www.suncoastconverters.com/ford/ford_product.html
 
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