Question about 2000 Dodge Ram 1500 Truck

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Abs, check engine lights on, odometer not working and replaced both speed sensors but did not fix problem

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  • April Ragsdale Apr 29, 2010

    ok let me start from the begining. I bought this truck and there were no warning lights on. The ABS and break and check engine light came on and odemoter worked on and off in about 2 weeks after and the breaks got spongy so I check the break fluid and there was none in there and I found that the combination valve was leaking. Don't know for how long but by how much fluid was underneath the truck it had been a while. So I replaced that and bleed the breaks. Break light went off but everything els stayed on. I went and had the code read it was po500 so I changed the speed sensor on the transmition. For about a day the all warning lights off and odometer worked. The next day check engine and ABS lights came on and the odometer stop working all together. I have changed that sensor out 3 times cause it kept happening. Iread that the differential speed sensor had common signs so I just replaced that and it didnt help at all. I am at a loss now? Thanks for your help

  • larry blais
    larry blais May 11, 2010

    What was the code? Was the code read? When you right "both speed sensors" What two?

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Thank yo very much for the details. So the next three times that the engine light came on and you replaced the same spd sensor, did you reread the engine code to make sure it was still the same code?
Unfortunately it sounds like you have a short in the wiring harness.
You really need a scan-tool to go further, sorry. There are three wires one should be ground, one should be 5volts power, and the other is 5volts reference return to ECM. I'm sure if you had one you wouldn't be asking me for help but if you have a repair manual and a multimeter you may be able to narrow down the search or find the problem. Electrical problems can be so stressful. But you know the code, you know what it is affecting, now you just need some luck and track it down. Let me know if I can be anymore help.

Posted on Apr 30, 2010

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