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Amedee, Former ASE Master Technician
Category: Honda
Satisfied Customers: 26604
Experience:  ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector
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Well no lowbeam headlights. fuses good... brand new multi

Customer Question

well no lowbeam headlights. fuses good... brand new multi switch...bulbs checked. no power at the fusebox with the lights in the on position. parking lamps are ok and work with the switch
JA: Is the power loss consistent, or does it fluctuate?
Customer: consistent
JA: What is the model/year of your Honda?
Customer: 2003 accord sedan
JA: Are you fixing your Accord yourself? What have you tried so far?
Customer: yes. i bought a new multi switch...checked the bulbs with my meter...fuses good. high beams perfect side markers perfect
JA: Anything else you want the mechanic to know before I connect you?
Customer: nope
Submitted: 11 months ago.
Category: Honda
Expert:  Amedee replied 11 months ago.

Hello and welcome!

My name isCustomerand I can assist you with your question.

Expert:  Amedee replied 11 months ago.

Are you looking for possible causes?

Can I start by getting your VIN or engine size?

Customer: replied 11 months ago.
Expert:  Amedee replied 11 months ago.

Thank you.

One minute while I gather some info for you.

Expert:  Amedee replied 11 months ago.

Is the vehicle equipped with daytime running lights?

Customer: replied 11 months ago.
Do not think so
Expert:  Amedee replied 11 months ago.

Ok, thanks.

Expert:  Amedee replied 11 months ago.

I would start by checking power to the combonation switch control unit, MICU and the low beam relay and inputs because the headlight circuit is controlled by the MICU system. The high beam and low beam headlight relays are located within the relay control module. Power Supply with the ignition switch in the ON (II) or START (III) position, battery voltage is applied through fuse 21 to the MICU and to the combination switch control unit. Fuse 7 is hot at all times and supplies battery voltage to the to the MICU and to the combination switch control unit. If there is no power at the fuse box with the headlights or "low beams" turned on, then the problem is BEFORE the fuse box. Here is a wiring diagram for this circuit.

Expert:  Amedee replied 11 months ago.

I am glad I can help!

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