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.
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HOMESERVICE MANUALSACURA20043.5RLREPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTSTEERING COLUMN SWITCHESCOMPONENT TESTSCOMBINATION LIGHT SWITCH
2004 Acura 3.5RL
Combination Light Switch
2004 Acura 3.5RLSECTION Combination Light Switch
- On MDX and 3.2TL, remove combination light switch. See COMBINATION LIGHT SWITCH under REMOVAL & INSTALLATION. On 3.5RL, remove lower instrument panel cover. Disconnect 20-pin (22-pin for Canadian models) connector located under instrument panel, on left side of steering column, left of brake switch. Disconnect 14-pin harness connector located behind left kick panel, above driver's multiplex control unit.
- On all models, ensure connectors and terminals are okay. If terminals are bent, loose or corroded, repair as necessary. Use DVOM and check continuity between specified terminals in each switch position. See appropriate COMBINATION LIGHT SWITCH CONTINUITY table. See Fig 1 -Fig 2 . If continuity does not exist, replace combination light switch.
COMBINATION LIGHT SWITCH CONTINUITY (MDX)
| Switch Position | Continuity Between Terminals No. | ||
|---|---|---|---|
| Headlight Switch | |||
| Off | No Continuity | ||
| Parking Lights On | 6 & 7 | ||
| Headlights On | |||
| Low Beam | 2 & 5; 3, 4 & 11; 6 & 7; 9 & 11 | ||
| High Beam | 2 & 5; 3, 4 & 11; 6 & 7; 10 & 11 | ||
| Passing Switch | |||
| Off | No Continuity | ||
| On | 3, 4, 10 & 11 | ||
| Turn Signal Switch | |||
| Left | 12 & 13 | ||
| Right | 13 & 14 | ||
COMBINATION LIGHT SWITCH CONTINUITY (3.2TL)
| Switch Position | Continuity Between Terminals No. | ||
|---|---|---|---|
| Headlight Switch | |||
| Off | No Continuity | ||
| Parking Lights On | 6 & 7 | ||
| Headlights On | |||
| Low Beam | 3, 4 & 11; 6 & 7 | ||
| High Beam | 3, 4 & 11; 10 & 11; 6 & 7 | ||
| Passing Switch | |||
| Off | No Continuity | ||
| On | 3, 4, 10 & 11 | ||
| Turn Signal Switch | |||
| Left | 12 & 13 | ||
| Right | 13 & 14 | ||
COMBINATION LIGHT SWITCH CONTINUITY (3.5RL - USA WITHOUT AUTOMATIC LIGHTING SYSTEM)
| Switch Position | Continuity Between Terminals | ||||
|---|---|---|---|---|---|
| Headlight Switch | |||||
| Off | No Continuity | ||||
| Parking Lights | A4 & A6 | ||||
| Headlights | |||||
| Low Beam | A3, A4 & A6 | ||||
| High Beam | A2, A3, A4 & A6 | ||||
| Passing Switch | |||||
| Off | No Continuity | ||||
| On | A2, A3 & A4 | ||||
| Turn Signal Switch (1) | |||||
| Left | A8 & A9 | ||||
| Right | A7 & A9 | ||||
|
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COMBINATION LIGHT SWITCH CONTINUITY (3.5RL - USA WITH AUTOMATIC LIGHTING SYSTEM)
| Switch Position | Continuity Between Terminals | ||||
|---|---|---|---|---|---|
| Headlight Switch | |||||
| Off | A4 & A5 | ||||
| Parking Lights | A4, A5 & A6 | ||||
| Headlights (Auto) | |||||
| Low | A3, A4, A5 & A6 | ||||
| High | A2, A3, A4, A5 & A6 | ||||
| Passing Switch | |||||
| Off | No Continuity | ||||
| On | A2, A3 & A4 | ||||
| Turn Signal Switch (1) | |||||
| Left | A8 & A9 | ||||
| Right | A7 & A9 | ||||
|
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COMBINATION LIGHT SWITCH CONTINUITY (3.5RL - CANADA)
| Switch Position | Continuity Between Terminals | ||||
|---|---|---|---|---|---|
| Headlight Switch | |||||
| Off | No Continuity | ||||
| Parking Lights | A2 & A7 | ||||
| Headlights | |||||
| Low Beam | A2, A4 & A7; A1 & A6 | ||||
| High Beam | A3, A4 & A7; A1 & A6 | ||||
| Passing Switch | |||||
| Off | No Continuity | ||||
| On | A2, A3 & A4 | ||||
| Turn Signal Switch (1) | |||||
| Left | A9 & A10 | ||||
| Right | A8 & A10 | ||||
|
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RENDER: 1.0x
NO RELATED
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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.