Hey Guys,
I have a couple issues with the '98 ranger i have. The speedo works at times but seems to go out after a few minutes of driving. I swapped out the sensor in the rear dif. That made it worse, the check engine light came on and the OD light was blinking. I check the error code and it was code 500" i think". I'm gonna replace the sensor again as it seems to be bad.
What else can this be? I don't know what else to check for the speedo being out.

Thanks in advance for any help you can provide.
Sota