XIV

2004 Honda accord sedan driver side map light is not turning on automatically when I open the door and when I push it to turn on.the bulb is new and it is working.the passenger side is working perfectly with no issue.

Did someone encounter this issue & what did you do to fix ?

tech8

The map lights have dual functionality; (1) turns on if pressed, and (2) works if door opened. Because the map lights have "dual functionality" there are two separate ground sources involved in the circuit. (1) When the map light is pressed on, the light switches gets their ground source from the base of the unit. (2) If a door is opened, the light switches gets their ground source through wiring coming from the Multiplex Integrated Control Unit (MICU). – All the individual doors switches (at each door) are wired into the MICU (located in the under-dash fuse box).

It probably is the micro-switch at the map light base unit, unless the base unit has corrosion, etc.. The micro-switch has three small receptacles which interface with three metal terminal blades. One of these metal terminal blades is not making sufficient contact inside the switch for the driver's side maplight bulb (probably the blade for the ground source coming from the MICU).

You can always try swapping the right map micro-switch to the left map side to see if that is the cause before you buy the micro-switch. Also, examine the base unit.

Mouser Electronics sells the ALPS switch (ALPS part number SPED210200) for $.86 each, plus shipping.

Your issue is relatively common for some Hondas, see this link regarding replacement from a Honda Pilot forum.

http://www.piloteers.org/forums/415928-post27.html

XIV

Actually now the problem of my map light is it does not turn on the light when I open the door although the selector on the switch is in on position.

tech8

Yes, probably due to the micro-switch like I previously posted.

" (2) If a door is opened, the light switches gets their ground source through wiring coming from the Multiplex Integrated Control Unit (MICU)...It probably is the micro-switch at the map light base unit, unless the base unit has corrosion, etc.. The micro-switch has three small receptacles which interface with three metal terminal blades. One of these metal terminal blades is not making sufficient contact inside the switch for the driver's side maplight bulb (probably the blade for the ground source coming from the MICU)."

XIV

How can I take out the micro switch from the unit after I remove the base unit?

tech8

You can just pull it or gently pry it out. The link shows a photo of the microswitch in the last photo where you would do that. It is plug and play.

XIV

Thanks for all your help..... Both switch are working , I just found out the the ground screw from the dome light is losse after tightening it everything works.

tech8

Good to hear that nothing needed replacement.