So my 1994 Bronco has been running pretty well for a good while now, but recently, the abs light has come on and now I have no speedometer, and the odometer displays, but wont go up. When it first started, the bronco would also take a very long time to shift, and the shifts were pretty hard, too. I initially thought it would be a speed sensor, so I went to test resistance in it, and the whole top of the sensor fell apart. So I had to replace it, which didn't change anything.
I pulled the abs codes which were 11, 17, 33, 41, and 42. Code 11 is ecu failure, 17 should be loss of reference voltage, and the last three are for all of the speed sensors. The ecu that I had was still under warranty, so I replaced that. Since then, it shifts like normal now. But I still have an abs light and no speedo. I also still have all of the same codes. All of my fuses and relays are good, so Im just wondering if there are any other likely causes I should look for before I start digging through the all of the wiring.

 

Something caused the ABS sensor to come apart - did you identify the original failure? With 4WABS code 11, all the other codes are irrelevant. Read this page & the NEXT several:

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So I finally got around to working on the bronco again. I went ahead and crossed the pins in the abs module that were supposed to allow the PSOM to function, but I still had the same issue, no speedometer and odometer wouldn't budge. I decided to go check for voltage at the speed sensors and found both wires for the rear speed sensor completely separated in two different spots. So I repaired the wires and everything works like it used to. So Im not really sure how just the rear speed sensor caused all of those codes.
And another thing I noticed was that the abs module I have has an f3 part number, even though the bronco has a 1994 manufacturing date.

 

That's not necessarily a PN; it's an engineering number. But like the PN, it indicates the year that the part was DESIGNED. The date code (if present) indicates when it was built. But a '94 Bronco should have a '94 EN on the 4WABS module.

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