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I have a 1996 F-250 7.3L all stock and after returning from a long trip the truck sat for about a week. When I went to start it everything except the speedometer is working fine. When I go to start the truck the speedometer jumps to the Max speed then back down to 0 and the odometer reads E 08 6 and I cant see my mileage. I can't find that error code in my service manual. I have no check engine light or ABS light the overdrive on - off is working fine. Just for grins I replaced the VSS and that did nothing. Anybody have any ideas. Thanks for your help.
I have a 1996 F-250 7.3L all stock and after returning from a long trip the truck sat for about a week. When I went to start it everything except the speedometer is working fine. When I go to start the truck the speedometer jumps to the Max speed then back down to 0 and the odometer reads E 08 6 and I cant see my mileage. I can't find that error code in my service manual. I have no check engine light or ABS light the overdrive on - off is working fine. Just for grins I replaced the VSS and that did nothing. Anybody have any ideas. Thanks for your help.
RZ....it sounds like your digital speedometer has maybe gone south. The chain of events for speed readings are: VSS -> PCM -> Speedometer. If the truck starts and runs normal, then the PCM should be ok. You might want to pull the cluster out and try unplugging, and replugging the harness connectors....see if that helps.