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2004 Mustang GT ABS light on
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<table border="0" cellpadding="1" cellspacing="1" width="99%" align="center"> <tr bgcolor="#000000"><td> <table border="0" width="100%" cellpadding="3" cellspacing="0"> <tr bgcolor="#000099"> <td colspan="2" align="left"> <font size="2" color="#ffffff" face="Verdana, Arial"> <b>T O P I C R E V I E W</b> </font></td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Built4Speed</b> <br /><small>Member # 13873</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2024,11,4,16,44,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> 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? <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>JohnB</b> <br /><small>Member # 969</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2024,11,7,12,49,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Have you checked/changed the main fuse? <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Built4Speed</b> <br /><small>Member # 13873</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2024,11,30,15,41,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> All the fuses look good. I have power at pin 8 on the harness side connector. I'm guessing bad abs module?<br /> <br /> <small>[ 2025-01-01, 07:46 PM: Message edited by: Built4Speed ]</small> <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>throttlepositionsensor</b> <br /><small>Member # 14838</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2025,0,3,15,10,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Page 30 lists three different fuses for ABS <a href="https://www.forelpublishing.com/demo/Demo13990.pdf" target="_blank">https://www.forelpublishing.com/demo/Demo13990.pdf</a><br />Can you find the 99-04 factory service manual? Factory service manuals have tests for all the modules. <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Built4Speed</b> <br /><small>Member # 13873</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2025,0,3,21,51,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> 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.<br /><br /> <img src="https://cafords.com/album/00013873/IMG_20241231_091918.png" style="max-width: 640px" alt=" - " /> <br /> </font> </td></tr> <tr bgcolor="#f7f7f7"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>throttlepositionsensor</b> <br /><small>Member # 14838</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2025,0,4,16,43,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> Did your module pass the voltage and resistance tests? Look for a replacement module at <a href="https://car-part.com" target="_blank">https://car-part.com</a> It is a database of car parts from most wrecking yards in the nation.<br /> <br /> <small>[ 2025-01-04, 04:43 PM: Message edited by: throttlepositionsensor ]</small> <br /> </font> </td></tr> <tr bgcolor="#dedfdf"> <td valign="top" width="18%"> <font size="2" face="Verdana, Arial"> <b>Built4Speed</b> <br /><small>Member # 13873</small> </font></td> <td width="82%"> <font size="1" face="Verdana, Arial"> <img src="https://californiafords.com/ubb/posticon.gif" border="0" alt=" - " /> posted <script language="JavaScript1.3" type="text/javascript"> document.writeln(timestamp(new Date(2025,0,25,18,37,0), dfrm, tfrm, 0, 0, 0, 0)); </script><hr /> </font> <font size="2" face="Verdana, Arial"> 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. <br /> </font> </td></tr> </table></td></tr></table> <br /> <br />
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