Gen 2 Raptor Auxiliary (Upfitter) Switch Wiring (2017–2020)

Who this is for

This is for the Gen 2 Raptor's six overhead AUX1–AUX6 upfitter switches, 2017 through 2020. Read the warning below before you cut into anything: the video on this page's own description lists a 2018+ wire color for AUX4 that doesn't match Ford's own 2019 supplement, and the wire colors actually changed between Ford's 2017 and 2019 documentation anyway. We're using Ford's tables only, not the video's description, and flagging exactly where the two years disagree.

Steps

1. 1

   Know before you start: the wire colors changed between 2017 and 2019

   Ford's own documentation lists different wire colors for the same AUX switches between the 2017 and 2019 Raptor supplements. That alone is reason enough to confirm your specific truck's wiring against the table for your model year rather than any color list you find online — including the one in the description of the video on this page, which lists AUX4 as Green/Yellow for "2018+" trucks when Ford's actual 2019 supplement lists it as Green/Brown. Use Ford's tables, not a video description, for the wire you're about to cut into.

2. 2

   Plan your load against the circuit's fuse rating

   Before you pick which AUX circuit to use, know the actual current draw of whatever you're wiring up and compare it against that circuit's fuse rating. Stay well under the fuse's rating for your accessory's draw — don't upsize the fuse to make a bigger accessory fit a smaller circuit; that defeats the point of the fuse protecting the wire.

3. 3

   Locate the powered circuit set for your model year

   On a 2017, the aux switch circuits are blunt-cut sealed wires near the under-hood power distribution box, with one pass-through circuit per switch located to the right of the glove box door, just above the passenger-side kick panel. On a 2019, Ford documents three separate sets: a powered set taped to a harness to the right of the power distribution box, an under-hood set taped near the right-side powertrain control module connector that routes to the passenger footwell, and an interior set at the other end of that same run, behind the kick panel's fuse-access door. Confirm which set you're looking at before you strip any wire.

4. 4

   Confirm the specific switch and wire color against Ford's table

   2017: AUX1 is CBB47A Green/Blue at 15A, AUX2 is CBB48A Gray/Yellow at 15A, AUX3 is CBB94 Violet/Orange at 10A, AUX4 is CBB96 Brown/Blue at 10A, AUX5 is CBB98A Gray/Orange at 5A, AUX6 is CBBA0B Yellow/Violet at 5A. 2019: AUX1 is Green/White (1.0 mm²) at 15A, AUX2 is Brown/Blue (1.0 mm²) at 15A, AUX3 is Gray/Yellow (0.50 mm²) at 10A, AUX4 is Green/Brown (0.50 mm²) at 10A, AUX5 is Brown/White (0.35 mm²) at 5A, AUX6 is Green/Orange (0.35 mm²) at 5A. If your truck is a 2018 or 2020, confirm against your own supplement — we don't have a verified table for either year.

5. 5

   Use a relay for anything beyond a small load

   For lights or accessories that draw meaningfully, wire a relay rather than running the full load through the switch circuit directly — it keeps you well inside the fuse's rating and takes the switching duty off the small-gauge wire.

6. 6

   Ground to the chassis, not the battery's negative post

   Whatever you're adding, ground it to the chassis rather than directly to the battery negative terminal — that post feeds the battery management system's current sensor, and grounding accessories there can throw off its readings.

7. 7

   Make sealed, heat-shrunk connections

   Strip, crimp or solder, and heat-shrink every splice rather than leaving a twisted or electrical-tape-only connection in a space that sees engine-bay heat and moisture. A loose connection here tends to show up as an intermittent accessory, which is far more annoying to chase than it would've been to prevent.

8. 8

   Test with the ignition on before closing anything up

   The aux switches only work with the ignition on — engine running or not, though Ford recommends running the engine for long use or a high-draw accessory. Confirm your new circuit actually switches on and off as expected before you button up any trim you removed for access.

Specs

Safety notes

• Confirm wire colors against Ford's supplement for your exact model year — they changed between 2017 and 2019, and at least one popular video description doesn't match the 2019 figures.
• Stay well under the circuit's fuse rating for your accessory's draw; never upsize a fuse to make a bigger load fit.
• Ground accessories to the chassis, never the battery's negative post.
• Seal and heat-shrink every splice rather than relying on tape alone.
• The switches only work with the ignition on — test accordingly, and disconnect the battery before starting any wiring if you're not confident working near live circuits.