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i never said it would affect the speedometer if the wire in the dash was removed, your correct because the wire in the dash WHITE PLUG in side the glove box is the OUTPUT FROM THE DASH TO THE ECU, YES out from dash into ECU,
DASH HARNESS PLUG BEHIND THE DASH would be the dash plug i am refering to , so if his speedometer is not working, then YES first ensure the VSS is INSTALLED in the transmissiona and pluged into the harness, DOESNT MATTER IF ITS A US (twin cam s13) OR JDM HARNESS the body (chassis) plug is the same wiring, but i dont remember if the rev light is wired the same.. and that the LOWER TRANSMISSION harness IS INSTALLED and plugged into the chassis harnesses by the fuse box in the engine...a and if all is right speedo shoudl work, and if not you need to double check the cluster plugs BEHIND the cluster... ( redundant) and if its plugged in maybe you have a bad guage or trace the wire from the cluster plug to the engine bay!
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