Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Hard Wired Inputs
The hard-wired inputs to the BCM include the following:
- A/C switch signal
- Ambient temperature sensor signal
- Body control module flash enable
- Coolant level switch sense
- Door ajar switch sense (two circuits, one left rear and one right rear)
- Driver seat heater switch MUX
- Fog lamp switch sense
- Fused B (+)
- Fused ignition switch output (run-acc)
- Fused ignition switch output (st-run)
- Ground (five circuits, two Z1 and three Z2)
- Hazard switch sense
- Headlamp switch MUX
- High beam switch sense
- Hood ajar switch sense (export only)
- Key-in ignition switch sense
- Liftgate ajar switch sense
- Liftgate courtesy disable
- Liftgate flip-up ajar switch sense
- Panel lamps dimmer signal
- Park lamp relay output
- Passenger seat heater switch MUX
- PCI bus
- Radio control MUX
- Rear window defogger switch sense
- Seat belt switch sense
- Ultralight sensor signal
- Washer fluid switch sense
- Washer pump switch sense
- Windshield wiper switch MUX
- Wiper park switch sense
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
No obligation. See pricing before you book.