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Home >> Honda >> 2021 >> Ridgeline RTL-E >> Repair and Diagnosis (Single Page) >> Electrical >> Component Locations >> Electrical System - Testing & Troubleshooting >> Fuse To Components Index >> Fuse to Components Index (2017 2018) >> Under-Dash Fuse/Relay Box (C)
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Under-Dash Fuse/Relay Box (C)

Fig 1: Under-Dash Fuse/Relay Box (C) Component Locations
GHH451875Courtesy of HONDA, U.S.A., INC.
Under-Dash Fuse/Relay Box (C) Legend

Fuse Number Amps Component(s) or Circuit(s) Protected
C1 20 A Power window master switch
C2 20 A In-bed trunk lid release actuator relay circuit (built into the under-dash fuse/relay box), In-bed trunk lid release actuator (via in-bed trunk lid release actuator relay circuit (built into the under-dash fuse/relay box)), No. C19 and No. C20 fuses in the under-dash fuse/relay box (via power door lock relay circuit (UNLOCK) (built into the under-dash fuse/relay box)), No. C33, No. C34, and No. C41 fuses in the under-dash fuse/relay box (via power door lock relay circuit (LOCK) (built into the under-dash fuse/relay box)), No. C35 fuse in the under-dash fuse/relay box (via power door lock relay circuit (DR UNLOCK) (built into the under-dash fuse/relay box)), Power door lock relay circuit (DR UNLOCK) (built into the under-dash fuse/relay box), Power door lock relay circuit (LOCK) (built into the under-dash fuse/relay box), Power door lock relay circuit (UNLOCK) (built into the under-dash fuse/relay box)
C3 7.5 A Electric steering lock (with electric steering lock), Engine start/stop switch, Keyless access/TPMS control unit
C4 20 A Front passenger's power window switch
C5 20 A Front accessory power socket (via front accessory power socket relay)
C6 20 A Fuel pump (via PGM-FI main relay 2), PCM
C7 15 A Active control engine mount (ACM) control relay, EVAP canister purge valve, Engine mount control unit, MAF sensor, PCM (via brake pedal position switch), PCM, Starter cut relay 1, Starter cut relay 2
C8 7.5 A Windshield wiper high/low relay circuit (built into the relay circuit board), Windshield wiper intermittent relay circuit (built into the relay circuit board)
C9 7.5 A Brake light relay, EPS control unit, Electric steering lock (with electric steering lock), Keyless access/TPMS control unit, Steering angle sensor, VSA modulator-control unit
C10 10 A SRS unit
C11 20 A Left rear power window motor (via left rear power window switch)
C12 20 A Back power window close relay (with back power window), Back power window motor (via back power window close relay) (with back power window), Back power window motor (via back power window open relay) (with back power window), Back power window open relay (with back power window)
C13 20 A Right rear power window motor (via right rear power window switch)
C14 20 A Fuel fill door opener solenoid relay, Fuel fill door opener solenoid (via fuel fill door opener solenoid relay), Moonroof motor-control unit
C15 20 A Power seat control unit (with DPMS), Rear up-down motor (via driver's power seat adjustment switch) (with power seat and without DPMS), Recline motor (via driver's power seat adjustment switch) (with power seat and without DPMS)
C16 7.5 A MICU
C17 20 A Driver's seat-back blower motor (with ventilated seat), Driver's seat cushion blower motor (with ventilated seat), Driver's seat heater (via driver's seat heater relay (HIGH)) (with seat heater and without ventilated seat), Driver's seat heater (via driver's seat heater relay (LOW)) (with seat heater and without ventilated seat), Front passenger's seat heater (via front passenger's heater relay (LOW)) (with seat heater and without ventilated seat), Front passenger's seat heater (via front passenger's heater relay (HIGH)) (with seat heater and without ventilated seat), Passenger's seat-back blower motor (with ventilated seat), Passenger's seat cushion blower motor (with ventilated seat), Ventilated seat control unit (via ventilated seat relay) (with ventilated seat)
C18 7.5 A Front individual map lights (via interior lights cut relay), Interior lights cut relay, Rear individual map lights (via interior lights cut relay), Roof console module (via interior lights cut relay), Vanity mirror lights (via interior lights cut relay)
C19 10 A Left rear door lock actuator
C20 10 A Front passenger's door lock actuator, Right rear door lock actuator
C21 7.5 A Front parking lights/daytime running lights/front side marker lights (with LED daytime running light), MICU
C22 7.5 A MICU
C23 7.5 A A/C compressor clutch relay, A/C condenser fan relay (via diode), Auto high-beam control unit (with auto high-beam), Automatic dimming inside mirror (without auto high-beam), Climate control unit (with climate control), Driver's seat heater relay (HIGH) (with seat heater and without ventilated seat), Driver's seat heater relay (LOW) (with seat heater and without ventilated seat), Driver's seat heater switch (with seat heater and without ventilated seat), Driver's ventilated seat heater switch (with ventilated seat), Fan control relay (via diode), Front blower motor relay, Front passenger's seat heater relay (HIGH) (with seat heater and without ventilated seat), Front passenger's seat heater relay (LOW) (with seat heater and without ventilated seat), Front passenger's seat heater switch (with seat heater and without ventilated seat), Front passenger's ventilated seat heater switch (with ventilated seat), Heated steering wheel relay (with heated steering wheel), HVAC control unit (without climate control), Left power mirror (via power mirror switch) (without DPMS), Power window master switch, Power window master switch (via power mirror switch) (without DPMS), Rear blower motor relay, Rear seat heater relay (with rear seat heater), Rear seat heater switch (with rear seat heater), Rear window defogger relay, Trailer charge relay, Ventilated seat relay (with ventilated seat)
C24 7.5 A Keyless access/TPMS control unit
C25 7.5 A ACC combination switch (via cable reel and audio remote switch) (with ACC), AC power outlet switch (with AC power outlet), Audio remote switch (via cable reel), A/T gear position indicator panel, Beverage holder light, Cargo area light switch, CD player unit (with CD player unit), Climate control unit (with climate control), CMBS OFF switch (with CMBS), Console box light, Cruise control combination switch (via cable reel and audio remote switch) (without ACC), Dashlights brightness control switch, Driver's footwell light, Driver's seat heater switch (with seat heater and without ventilated seat), ECON switch, Front passenger's airbag CUTOFF indicator, Front passenger's footwell light, Front passenger's seat heater switch (with seat heater and without ventilated seat), Glove box light, Hazard warning switch, Heated steering wheel switch (with heated steering wheel), Heated windshield wiper area switch (with heated windshield wiper area), HomeLink ® switch (with HomeLink ®), HFT switch (via cable reel and audio remote switch), HVAC control unit (without climate control), Intelligent traction management switch (AWD), Interior light switch (without moonroof), Moonroof switch (with moonroof), Parking and back-up sensor switch, Power mirror switch, RDM switch light (with RDM), Rear control panel, Roof console module, Select/reset/information switch (via cable reel, audio remote switch, and ACC combination switch (with ACC) or cruise control combination switch (without ACC)), Snow switch (2WD), VSA OFF switch
C26 7.5 A Driver's lumbar support motor (via driver's lumber support switch) (with lumbar support)
C27 7.5 A Front parking lights/daytime running lights/front side marker lights (with LED daytime running light), Front parking lights (without LED daytime running light), Front side marker lights (without LED daytime running light), License plate lights, Taillights/rear side marker lights, Trailer small light relay
C28 10 A 12 volt battery fan, i-VTM control unit (AWD), Left side BSI radar unit (with BSI), Millimeter wave radar (with ACC), Multipurpose camera unit (with multipurpose camera unit), RDW switch (with RDW), Rear differential pump motor (AWD), Right side BSI radar unit (with BSI)
C29 7.5 A ANC/active sound control unit, Audio-navigation unit (via reverse relay circuit (built into the under-dash fuse/relay box)) (with navigation), Audio unit (via reverse relay circuit (built into the under-dash fuse/relay box)) (without navigation), Automatic dimming inside mirror (via reverse relay circuit (built into the under-dash fuse/relay box)) (without auto high-beam), Back-up lights (via reverse relay circuit (built into the under-dash fuse/relay box)), Gauge control module, MICU, MICU (via IG1B relay), MICU (via reverse relay circuit (built into the under-dash fuse/relay box)), Parking and back-up sensor control unit, Parking and back-up sensor control unit (via parking and back-up sensor switch), Parking and back-up sensor switch, Power mirror control unit (with DPMS), Power seat control unit (with DPMS), Reverse relay circuit (built into the under-dash fuse/relay box), Rear seat heater control unit (with rear seat heater), Shift lock solenoid, Ventilated seat control unit (with ventilated seat)
C30 --- Not used
C31 7.5 A PCM
C32 7.5 A Front passenger's airbag CUTOFF indicator
C33 10 A Front passenger's door lock actuator, Right rear door lock actuator
C34 10 A Driver's door lock actuator
C35 10 A Driver's door lock actuator
C36 20 A Front up-down motor (via driver's power seat adjustment switch) (with power seat and without DPMS), Power seat control unit (with DPMS), Slide motor (via driver's power seat adjustment switch) (with power seat and without DPMS)
C37 10 A MICU
C38 10 A MICU
C39 7.5 A Keyless access/TPMS control unit
C40 7.5 A Audio unit (without navigation), Audio-navigation unit (with navigation), Console accessory power socket relay, Front accessory power socket relay, Rear ANC/active sound control microphone, USB charger unit (with USB charger unit)
C41 10 A Left rear door lock actuator
C42 --- Not used