Diesel Bombers - OD light on tach not working

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Christian Beaulieu

04-14-2017 10:45 AM

OD light on tach not working

so just finished fixing my fuel leaks and my batterries were dead so i charged the finally the truck started but now my tach wont work and my OD light is on went for a run and wont go into low gears anyone else have this issue before?

Haz Tanker

08-20-2017 08:16 AM

Most likely the DPC-100 TCU, it's in the firewall on the driver side where a PCM would be for a gas or Powerstroke engine.

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