why has my heater, ac, and speedometer stopped working and why is my check engine light on

2003 DODGE RAM
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DINOWV
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there is no power going to my heater controls, and my speedometer doesn't work but my tachometer does and my check engine light is on and all of this started around the same time after the drivers side door was replaced
Oct 10, 2011 at 3:11 PM
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JACOBANDNICKOLAS
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The speedo could be a speed sensor issue. That could turn the check engine light on. Have the computer scanned to identify the trouble code. As far as the heater control, check fuses.

Most parts stores will scan the computer for free, so have that done and let me know what you find.
Oct 10, 2011 at 4:56 PM
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DINOWV
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i have checked all fuses and relays and speed sensor has been replaced.
Oct 10, 2011 at 5:26 PM
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JACOBANDNICKOLAS
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Were you able to get trouble codes from the computer?
Oct 10, 2011 at 5:44 PM
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DINOWV
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no
Oct 10, 2011 at 5:49 PM
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JACOBANDNICKOLAS
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Is the check engine light still on?
Oct 10, 2011 at 5:52 PM
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DINOWV
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yes the check engine light is still on along with the abs, and brake light and the heat is stuck on vent but there is no power going to controls and all of this started at the same time.
Oct 10, 2011 at 6:06 PM
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DINOWV
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and just so you are aware, the heater doesn't blow hot or change from the vent to anywhere else...
Oct 10, 2011 at 6:27 PM
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IFNOT1PROBLEMITS2MORE
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Control module located on outside off fuses. U can get one from junk yard but it has to be same year. Its mounted to out side fuse box
Oct 12, 2011 at 2:20 AM
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