Join Date: Sep 2009
Location: BC Canada
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On my 2003 6.0 with the torqueshift, the PCM gives the signal for the backup lights, it triggers a relay in the central JB, the relay draws power from fuse 8 in the CJB and outputs it to the trailer reverse realy,parking aid module, and the reverse lamps.
So there is no switch for the reverse lamps. It is a signal from the PCM.
2003 Ford F-350 King Ranch Crew Cab Short Box, 6.0L Powerstroke, DashDAQ, custom rear diff cover, DIY egr delete, air cleaner, fumoto drain valve, DIY coolant filter, JVC NX7000 Nav system Sirius/Bluetooth, remote start/alarm, spray in box liner, DIY Britebox and custom power feed, DIY High Idle, big HFCM drain plug,