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I am attempting to diagnose a fairly insidious electrical issue in a 2001 Honda Prelude SH.

My question is: With the ignition off and the headlights off, but the hazard switch on, what should the behavior of the front side marker lights be? Should they be off, solid, or flashing with the hazards?

In my case I have the left side on solid and the right side off, unless I also turn on the parking lights, in which case the left side flashes and the right side turns on solid. So, I'm not really sure what's supposed to be happening.

I suspect they should be off; I'm looking at electrical diagrams and the marker lights don't seem to be connected to the flasher relay, and off seems to make more sense to me than on.

I'm hoping somebody with this car could observe. I suspect 97-01 will have similar behavior.

Jason C
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2 Answers2

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As Ben mentioned in a comment, and after further experiments and closer looks at the wiring diagrams, I have found that, for this car:

  • The markers should be on solid when the parking lights or headlights are switched on at the steering wheel (including when the ignition is off).
  • The markers should be off in all other cases, regardless of turn signals or hazards.
  • They should never flash.
Jason C
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This sounds like a classic case of a poor connection at a grounding point - as you note in the comments, almost certainly a shared one between the various left-hand lights. Take it off, clean all the surfaces and reassemble and that ought to clear it - it's probably worth cleaning the other connections to the lights as well.

Nick C
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