BMW K bikes (Bricks)

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1Back to top Go down   Headlight Plug Empty Headlight Plug Wed Feb 05, 2014 8:29 am

Guest

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While I've got the fairing off for paint, I'm going to put in a pair of relays for the headlights. I was just going to cut the existing plug and drive the relays with those wires and then wire in the original plug from the relays to the headlight. I notice several people mentioning they've installed a ceramic headlight plug. Is there any reason to swap the plug?

    

2Back to top Go down   Headlight Plug Empty Re: Headlight Plug Wed Feb 05, 2014 8:42 am

92KK 84WW Olaf

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The relays route the power to the headlight away from the headlight switch which once the relays are fitted only passes the current to activate the relay instead to light the bulb. Given the nature of the K wiring this in itself seems to improve the lighting a little and bring more power to the bulb because there is less resistance. More power is more heat which in theory can cause the bulb plug to overheat and melt a little, especially as it will be old and the connections may not be absolutely perfect..

The ceramic plug also allows fitting higher wattage or higher output bulbs without risk of overheating the plug. They are or should be very cheap, standard H4 bulb connection.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

3Back to top Go down   Headlight Plug Empty Re: Headlight Plug Wed Feb 05, 2014 8:55 am

Guest

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Sounds like a plan. Found one on fleabay for $6 delivered. Cheers.

    

4Back to top Go down   Headlight Plug Empty Re: Headlight Plug Wed Feb 05, 2014 4:19 pm

sidecar paul

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Robin, you don't need to cut the existing plug for the headlamp: standard Lucar ¼" spade connectors will fit the plug.

Just a thought.

Paul.


__________________________________________________
'84 K100RS (0014643) (owned since '85), 86 K100RS (0018891) with Martello sidecar (built as an outfit in '88),
'51 Vincent (since '67),'72 Montesa Cota (from new), '87 Honda RS125R NF4 (bought 2015) 
....No CARS never ever!
    

5Back to top Go down   Headlight Plug Empty Re: Headlight Plug Wed Feb 05, 2014 4:54 pm

duck

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FWIW: I Posi-tap the relay trigger wires into the connector for the left combo switch.

Solid yellow - low beam

Solid white - high beam



Last edited by duck on Wed Feb 05, 2014 5:03 pm; edited 1 time in total


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

6Back to top Go down   Headlight Plug Empty Re: Headlight Plug Wed Feb 05, 2014 5:01 pm

Rendrag

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When I did mine, I didn't touch the headlamp plug at all  - it was much more convenient to grab the wires under the tank:

Headlight Plug Img_1312

The white and yellow wires out of the connector block are High and Low directly from the left hand switchblock.  So you take them to drive two relays, and then take the outputs of the relays and feed them into the other side of where you cut.  You then have an easy high and low feed to then send off to your dash pad switches and then feed back to other relays for your fog, fill-in, and driving lights Smile

This is how I had the lights wired on my K:

Headlight Plug Bike%20wiring

Cheers,

DG


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2000 VFR800
    

7Back to top Go down   Headlight Plug Empty Re: Headlight Plug Wed Feb 05, 2014 5:04 pm

Rendrag

Rendrag
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92KK K100LT 193214 wrote:The ceramic plug also allows fitting higher wattage or higher output bulbs without risk of overheating the plug. They are or should be very cheap, standard H4 bulb connection.

FYI 92KK, here in .au, we're restricted to a maximum of 55/60W. So no higher wattage allowed. Though we do tend to use the higher output bulbs, but I have to admit, my +90% globes don't get any hotter than standard globes?


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2000 VFR800
    

8Back to top Go down   Headlight Plug Empty Re: Headlight Plug Wed Feb 05, 2014 5:10 pm

92KK 84WW Olaf

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Rendrag,

You are correct in that and we are also restricted tot he same wattage. But, having said that higher wattage bulbs are sold for off road use. If you use these ones 'off road' then they do get hotter....


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles. 
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles currently 42,640 miles.

Past:
1968 Yamaha 80 YG1
1971 Yamaha 125 YAS-1
1968 Honda 125 SS
1970 Honda CD 175
1973 Honda CB500-4
Honda CX 500
    

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