The roof cab spoiler fits on the rear roof of your cab. It does not replace any factory part. It is held on with pre-applied 3M automotive tape. Some versions come with lights, which need to be wired before the spoiler is stuck down. This guide covers mounting the spoiler for the 2024-2026 Toyota Tacoma and the wiring for the lights.
Before you peel anything: do a dry fit. Once the red backing is off the tape, the part is considered used, so make sure it fits and the color is right first. If you ordered a painted or color-matched version, check the color against your truck during the dry fit.
Note: the manufacturer shows the mounting steps for this spoiler in an installation video only. The mounting steps below follow the same approach as our other overlays. If anything on your truck looks different, stop and contact us.
1. Before you start
- Check the spoiler against your order for the right finish and for damage. If it includes lights, check which type they are (see the wiring section).
- Pick a day and place where the surface can be 68 to 100 F (20 to 38 C), and never below 60 F (15 C). If it is cooler, warm the surface and the part gently with a hair dryer or heat gun, from a distance.
- If your spoiler has lights, wire and test them before you remove any backing.
2. What you will need
- Isopropyl rubbing alcohol, a clean lint-free cloth, masking tape and a plastic pry tool.
- The adhesion promoter and tape that come with the spoiler.
- For lights (not included): wire strippers and crimpers, a multimeter or test light, heat gun and heat-shrink connectors, heavy-duty zip ties, a socket set, a drill with a stepped bit for aftermarket switches, 16 AWG and 18 AWG primary wire, an inline fuse holder with a 5 A fuse and the switches your light type needs.
3. Mount the spoiler
- Dry fit the spoiler on the rear roof without removing any backing. Note where it sits when centered.
- Clean the roof with isopropyl alcohol and a clean cloth and wipe the adhesion promoter wherever tape will touch. Let it dry.
- Expose the tape in stages. On the perimeter strips, peel back and fold over the first inch or so of red backing and stick it to the front of the part with masking tape. Fully remove the backing on any inner strips, because you will not be able to reach them once the part is in place. This keeps the tape from sticking before the part is positioned.
- Position the spoiler without letting tape touch. Work from the center of the part outward and press firmly on all taped areas.
- Pull the folded-over backing tabs one area at a time, pressing each straight away, then press the whole part again. Remove any protective film.
After installation
- Press all taped areas firmly again 24 hours later.
- Wait at least 48 hours before an automatic car wash or highway driving.
- The tape reaches full strength after 3 to 5 days at temperatures above 70 F, and longer if it is cooler. Once fully bonded, the part is very hard to remove without damaging it.
Wiring the lights (if your spoiler has them)
Important: these are typical example instructions, not a complete technical manual. Adjust them to your truck and your setup. The kit does not include the wire, fuses or switches. If you are not comfortable with vehicle wiring, ask a qualified technician, and check your local rules on lighting before you use warning lights on the road.
Spoilers are supplied with one of two light styles. Check yours and follow the matching section.
Surface-mount "pill" style lights
- Bench wiring (spoiler off the truck). Mount both lights in the spoiler. Join the two red wires and attach a long 16 AWG red wire (about 30 ft) for main power. Join the two black wires and attach the black chassis-ground wire. Join the two yellow wires permanently and attach a long 18 AWG yellow wire for pattern select. Cap each white wire separately and do not connect them together. Bundle the long red and yellow wires in loom.
- Route the harness. Lay the spoiler on the roof temporarily to check the wire length. Run the harness out of the side of the spoiler, down the rear cab window channel and under the cab. Follow the frame rail forward and tie the wire every 12 inches. Keep it away from exhaust, suspension, steering, sharp edges and moving parts. Ground the black wire to a clean chassis bolt, removing paint and rust for a good metal contact.
- Connect in the cab. Disconnect the negative battery terminal first. Bring the red and yellow wires into the cab through an existing firewall grommet (avoid drilling the firewall). Wire it as battery positive, 5 A fuse, ON/OFF switch, red wire to the lights. Connect a normally open momentary push-button between the switched +12 V output and the yellow wire. Do not use an ON/OFF toggle for the yellow wire.
- Test before mounting. Reconnect the battery and switch the power on: both lights should flash together. Each press of the push-button should advance both lights to the next pattern; holding it for about five seconds resets to pattern 1. Then return to the mounting steps above.
HG2 back-side mounted lights
- Bench wiring. Mount the two flashers in the spoiler. The driver-side light is the master and the passenger-side light is the slave. Join the yellow wires between the two lights (these stay inside the spoiler). Join the blue wires and attach a long 18 AWG blue wire for the takedown signal. Join the red wires and attach a long 16 AWG red wire for main power. Join the black wires and attach the black ground wire. Connect a long 18 AWG white wire to the white wire of the driver-side (master) light and cap off the passenger-side white wire.
- Route the harness as described for the pill style: down the rear window channel, under the cab and along the frame rail, tied every 12 inches and clear of heat and moving parts, with a clean chassis ground.
- Connect in the cab. Disconnect the battery first. Red goes through the 5 A fuse to a main ON/OFF switch. Blue goes to the output of a second ON/OFF switch for the takedowns. White goes to a momentary push-button for the pattern select.
- Test before mounting. On power-up the driver-side light should flash twice and the passenger-side light once. Pressing the momentary button should change patterns on both lights together, and the takedown switch should turn both lights solid white.
For any other light style, follow the light maker's instructions.
Care
- Treat the overlay like a fine paint finish and use good quality car care products.
- Gloss: light scratches can often be buffed out.
- Matte: abrasion leaves a permanent glossy sheen. Do not buff matte finishes, avoid friction, and use a brushless car wash.
- Textured black TPO cannot be polished or repainted.
Troubleshooting
The spoiler will not sit flush
Do not press the tape down. Check the position, that nothing is caught under the edge, and warm the part slightly if it is cold.
The lights do not flash together
Check that the yellow wires are connected together, that both lights get the same switched power and that both black wires have a secure ground.
Need help? Email info@partify.ca or call 888-719-8297, and tell us your vehicle and the part number from your order.