Quote:
Originally Posted by guidogto
Help! my 1994 century won't shift, the speedometer shows 0, my 97 service manual shows the transmission won't shift without speed input, trouble code 502, low speed sensor input, changed the speed sensor but the problem persists. I could only find 2 fuses in the front passenger side under the hood with relays in front of them, the fuses are good, all the fuses in the glove box are good, I still believe it's a fuse problem. is there a fuse on the speedometer? the speedometer is analog, not fluorescent. thanks for any help.
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Since you have a service manual, you should have access to a schematic. It will show you any fuses in the system. You need to verify that the wiring is ok between the the speed sensor and wherever it runs to. No shorts or opens. I'm no trans guy, but there is also the possibility that the tone ring that the speed sensor uses for the speed signal is loose/not spinning. You can check this by removing the sensor and use your finger or a small tool to try and spin the signal ring. It should not spin freely.