This is topic 2004 Mustang GT ABS light on in forum Tech Talk at Northern California Ford Owners  .


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Posted by Built4Speed (Member # 13873) on :
 
Changed the rear speed sensors so far and still on. My OBD2 scanner doesn't see any Abs codes. Anyone know if there is a way to test if the module is bad?
 

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Posted by JohnB (Member # 969) on :
 
Have you checked/changed the main fuse?
 

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Posted by Built4Speed (Member # 13873) on :
 
All the fuses look good. I have power at pin 8 on the harness side connector. I'm guessing bad abs module?

[ 2025-01-01, 07:46 PM: Message edited by: Built4Speed ]
 

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Posted by throttlepositionsensor (Member # 14838) on :
 
Page 30 lists three different fuses for ABS https://www.forelpublishing.com/demo/Demo13990.pdf
Can you find the 99-04 factory service manual? Factory service manuals have tests for all the modules.
 

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Posted by Built4Speed (Member # 13873) on :
 
Here's what I've found in the shop manual. Going to send the module in for repair on eBay and see if that fixes my problem.


 

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Posted by throttlepositionsensor (Member # 14838) on :
 
Did your module pass the voltage and resistance tests? Look for a replacement module at https://car-part.com It is a database of car parts from most wrecking yards in the nation.

[ 2025-01-04, 04:43 PM: Message edited by: throttlepositionsensor ]
 

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Posted by Built4Speed (Member # 13873) on :
 
Just got the module back after sending it away for repair and it is working. No abs light. Traction control works. I haven't dyno'd it yet but I'm pretty sure 15HP gain easily.
 

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