Problem with LED headlamp bulb

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Nortoncommandoneil

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Jun 9, 2004
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Hi, I've just installed an LED headlamp bulb in my Commando 850 1974 positive earth motorcycle. I'm currently finding that when the LED bulb is on full beam the headlamp warning light in the headlamp shell is out, but when i switch the handlebar switch to dipped position the warning light comes on but the headlight bulb is dipped.
I've replaced the headlamp warning light bulb also with an LED but this makes no difference.
If i swap the Headlamp LED bulb back to the normal pre focus bulb it all works correctly.
Does anyone know if this is normal.
Thanks Neil
 
Nortoncommandoneil said:
Yes, i did.
He sent me out an LED for the headlamp shell warning light, but still no improvement.
Click to expand...
Yep, I had exactly the same problem (starting post #13)...

LED main, pilot & stop/tail light upgrade.

I have sent Paul Goff an email asking for advice on which of the above would be suitable for my Commando ('74 850 mk2 +earth). Until I hear back from him, would anyone who has made the upgrade care to offer any recommendations? The stop/tail light would be the mk2 LB12 light board I would...
www.accessnorton.com www.accessnorton.com
 
Cutting to the chase, I bit the bullet, binned the PG lights and bought the new Lucas LED's from B+Bogus and all was well.
 
concours said:
The H4 plug pin assignment is different than the OEM lamp.
Click to expand...

Nortoncommandoneil said:
If i swap the Headlamp LED bulb back to the normal pre focus bulb it all works correctly.
Click to expand...
BPF (British Pre-Focus), not H4 so no 3-pin plug.

LED Headlight bulbs British Pre-Focus + H4s

Double Dipper, British Pre Focus LEDs, Stop tail LEDs, LED H4 car headlights, LED headlight bulbs,LED H4, H4 LED,British Pre Focus LED,Bayonet Cap LED, LED headlamp bulbs,H4 LED headlamp bulbs,LED headlights for old bikes,LED headlights for old cars
www.norbsa02.freeuk.com
 
Bonzo said:
Cutting to the chase, I bit the bullet, binned the PG lights and bought the new Lucas LED's from B+Bogus and all was well.
Click to expand...
I take it that i won't successfully be able to get these LED bulbs working the correct way, unless i change to the Lucas brand.

Unless i just put up with the warning light not working in the correct sequence or return to the Pre focus bulb ?
 
Well, never say never ;), but I took the easy option and started again as they're not over expensive.

The new Lucas BAY15D stop/tail light didn't work correctly on my '74 mk2 (for the reasons mentioned in post #73 in that link) and I swapped the high beam warning light back to the original bulb as it was too bright, burning my retinas on dark rides.

You could do worse than getting the Lucas main/high beam, pilot and a couple of warning lights if you're looking for a simple plug & play (part numbers in the link in B+Bogus's post #54).

Keep us posted 👍
 
Last edited:
there is a new LED BAY15 stop tail specifically for 917 rear lamps appeared in the Lucas range WW13101
i assume they have modified it to project white light on to the number plate and red for stop
 
Frankie17 said:
there is a new LED BAY15 stop tail specifically for 917 rear lamps appeared in the Lucas range WW13101
i assume they have modified it to project white light on to the number plate and red for stop
Click to expand...
Ahh, nice one, been waiting for that.

Cheers 👍
 
the Led bulbs sold by Goffy are listed as voltage specific & polarity specific fitment
the newer production LED headlight bulbs have overcome this issue and are not voltage or polarity specific with internal chips to compensate and they will work with 6-24 volts on both positive & neg ground systems
Lucas advise fitting the BA7 LED bulb in the warning light to eliminate any potential issues when dipping lights so a lot more plug and play than goffy`s range
 
Cheers Frankie,

I swapped the LED warning light bulb back to standard to avoid the distracting glare, with no issues 👍

I'm not knocking Goffy's lights by the way, they just didn't work out for me.
 
Frankie17 said:
there is a new LED BAY15 stop tail specifically for 917 rear lamps appeared in the Lucas range WW13101
i assume they have modified it to project white light on to the number plate and red for stop
Click to expand...
Unfortunately out of stock at the distributors :confused:
 
Frankie17 said:
there is a new LED BAY15 stop tail specifically for 917 rear lamps appeared in the Lucas range WW13101
i assume they have modified it to project white light on to the number plate and red for stop
Click to expand...
Fairly sure that's a planned part that will be arriving soon. I mentioned a while ago that I discussed the issue with Wassell and was promised that they via Lucas would rectify the problem. I don't think they've had any to sell yet but they are coming. I have an order on hold for more stock of all the LEDs and am just waiting for these to execute the order.
 
marshg246 said:
Fairly sure that's a planned part that will be arriving soon. I mentioned a while ago that I discussed the issue with Wassell and was promised that they via Lucas would rectify the problem. I don't think they've had any to sell yet but they are coming. I have an order on hold for more stock of all the LEDs and am just waiting for these to execute the order.
Click to expand...
The 917-specific taillight bulbs are now in stock at Wassell and I will have them Wednesday or Thursday. They also now have turn signal LEDs but you must change the flasher to a LED-capable unit and the headlight indicator bulb must be re-wired. Personally, I'm sticking with standard bulbs for the turn signals and a standard bulb for the indicator but I will stock the turn signal LEDs and provide wiring info.
 
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