What are these plugs for behind the headlight?

I’m putting back together a 400SM, and I didn’t take as much notice pulling the electronics apart as I probably should have…

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As far as I can tell (never having owned one of these until very recently), there are no corresponding plugs to the ones shown in the pictures.

The white one feeds into the speedo display, and the black one feeds into the main wiring harness that runs under the fuel tank. 

I’ve read that one of them is for a handlebar odometer reset button, but I haven’t managed to find anything on the other one. 

Help a brother out boyos.

Edited by Hexxle

I’m thinking that second one is for the horn or turn signal…?

I’m not home so can’t go look right now…

Edited by Jboat

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The white one is for a remote switch For trip meter reset the black one looks to be for the horn

18 minutes ago, Jboat said:

I’m thinking that second one is for the horn or turn signal…?

I’m not home so can’t go look right now…

12 minutes ago, Erik Marquez said:

The white one is for a remote switch For trip meter reset the black one looks to be for the horn

That’s the white one accounted for then, thanks. 

But the other one isn’t either the horn or either of the turn signals, they’re all connected up. 

Sorry looked wider than that when I looked on my phone

Brown and black wire in two terminal black connector should be either fan or rad temperature switch

  • What are these plugs for behind the headlight? 1

Hi,

The brown / Black/White wire is a park / running light – I suppose it’s a throw over from when you could turn the headlight off and just have a park light running when your riding.

Mine is a 2017 and that wire is unused and unplugged

Edited by roleyrev

  • What are these plugs for behind the headlight? 1

What year is your’s? While you had access did you do the clutch safety over ride? Mine was easy just unplug then reconnect wires to each other! When I redid my lights I found the black wire unused. From what I found it is for “running lights”. Since my new headlight as an extra bulb. I did consider using it but for now I’m not.

12 hours ago, roleyrev said:

Hi,

The brown / Black/White wire is a park / running light – I suppose it’s a throw over from when you could turn the headlight off and just have a park light running when your riding.

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Mine is a 2017 and that wire is unused and unplugged

While that may be correct for your NON US bike, head lights have never been able to be turned off on a US DRZ400.. US law since 1976 has required a motorcycle headlight to always be on.

Further, the front lights on a DRZ in the US are Light green and Black with white trace on the front right, wiring harnesses side of the plug, and Black and black with white trace on the left front 

The black plug in the OPs pic appears to be a brown wire and a black with white trace..

The black with white trace is a ground wire..

The brown wire ,,,,,,,,,,only one I know if that comes to mind is in the harness and goes from ignition switch to rear tail light…. 

 

13 minutes ago, Erik Marquez said:

While that may be correct for your NON US bike, head lights have never been able to be turned off on a US DRZ400.. US law since 1976 has required a motorcycle headlight to always be on.

Further, the front lights on a DRZ in the US are Light green and Black with white trace on the front right, wiring harnesses side of the plug, and Black and black with white trace on the left front 

The black plug in the OPs pic appears to be a brown wire and a black with white trace..

The black with white trace is a ground wire..

The brown wire ,,,,,,,,,,only one I know if that comes to mind is in the harness and goes from ignition switch to rear tail light…. 

 

yup, following that logic when the key is turned on so the rear light and also any front running light / park connected to the brown wire at the front.  The wire appears live in the park position as well as the run position.  I vaguely recall there being a small light at the bottom of the front reflector (park light) that always operated.  I haven’t seen one on a new bike since the “you must run with lights on” law implemented here at some stage in the last 10 years. 

It makes sense given the global selling of the DRZ that this wiring still might exist for some markets and a global wiring loom used. 

And.. I found it completely handy to power the cool park light feature on the JNS engineering headlight.

Edited by roleyrev

  • What are these plugs for behind the headlight? 2

Yes I accidentally said black wire not black plug. But it’s unused in my U.S. bike.

  • What are these plugs for behind the headlight? 1

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