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Headache and the brown wire mystery

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exvalvesetdabbler:
I have been trying to figure out how to have the front position light on without lighting up the tail light and gages after fitting a LED bulb.  Kind of stumped at the moment  thought I would test things before diving in. For some reason the front position light only comes on when the ignition is on and the headlight switch is in the first position. If I turn the key to the park position, only the tail light comes on. Aside from TL1(Bn) and TL2(Bn/W) wires crossed over in the headlight shell I have no ideas. Need to check when its dark if the instruments light up in park. I remember the front parking light working in the past but probably a long time ago and distant memory. The only wiring that has been poked recently is the horn terminals and the wires that run out to the tail light under the mudguard.

I have studied the wiring schematic and traced the brown wire, there are four terminations, front position light, tail light and two wires on the main switch PA and TL2.  So power on either brown wire at the switch should light up both lamps. I can't figure out why one lamp can get power and not the other one since there is a continuous connection between them.

I unwrapped an old wiring harness to verify the connection and the 4 brown wires are soldered together in the loom as they should be.

I'm not in any hurry to unravel the spaghetti in the headlamp shell and would welcome any insights before I dive further in.  The next move at the moment is to remove the battery and replace it with a bench power supply with current limiting before poking around. Probably early next week if time permits.

Having the position light permanently on isn't or shouldn't be that difficult, just need a diode in the existing brown wire feed to the bulb and then introduce a fused & switched power feed down stream of the diode.

Regards
Dave

 

Johnwebley:
Can I suggest you fit an stop/tail LED bulb,

And ride with it on,
Being LED to consumption is negligible

Save a lot of bother

Sent from my SM-A546E using Tapatalk

exvalvesetdabbler:
Thought about that, finding one that has the right approvals is not so easy. Would also need to swap out the guage lights, but some say that the heat from those minimises condensation build up inside.  16W  between them, that's more than my soldering iron!

Still need to get the parking light working which is turning out to be the hard bit for now.

Thanks
Dave

Bryanj:
Honda designed so the front and rear parking lights come on together, only way to stop rear comming on would be to fit an extra switch to turn it off and that poses all sorts of problems if you forget to turn it on

exvalvesetdabbler:
Yes, hence the diode to feed the front from switched live.  The light switch  and park would still  feed everything as it did before as should the park setting.

Dave

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