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Makes And Models => Zero Motorcycles Forum | 2013+ => Topic started by: petewarm on November 08, 2020, 03:34:52 AM

Title: SR/F headlamp wattage
Post by: petewarm on November 08, 2020, 03:34:52 AM
Hi all.

Anyone know the wattage of the current SR/F headlamp?

I'm asking as I'm about to fit a fairing with a 7" hole, so planning to get an LED headlight.
Would be nice to get same wattage ( both dip and full beam) so I don't get lots of error messages.

Thanks

pete
Title: Re: SR/F headlamp wattage
Post by: Hans2183 on November 08, 2020, 09:34:18 PM
No clue but please share pictures of that fairing  8)
Title: Re: SR/F headlamp wattage
Post by: ESokoloff on November 09, 2020, 09:20:29 AM
Buy a VOM & find out yourself https://www.amazon.com/multimeter/s?k=multimeter

There cheep enough.
Title: Re: SR/F headlamp wattage
Post by: DonTom on November 09, 2020, 09:53:00 AM
Quote from: ESokoloff on November 09, 2020, 09:20:29 AM
Buy a VOM & find out yourself https://www.amazon.com/multimeter/s?k=multimeter

There cheep enough.
Just in case this helps . . .

Be sure VOM  has a ten amp scale.

But first check the voltage on the lamp when on. I assume it's  around 13 VDC.

Check the current in series with the lamp, when it's on.

Say it's 13 volts.  And you measure 4.5 amps.  13 volts times 4.5 amps=58.5 watts. 

-Don-  Reno, NV
Title: Re: SR/F headlamp wattage
Post by: petewarm on November 10, 2020, 11:57:20 PM
Just got headlamp off. Phew!  what a tight fit.

Back of headlamp says:

12V 1.6W (PL)
12V 14.7W (LB)
12V 20.2W (HB)
Which all seems very low.

Ill measure them tomorrow. Thanks fro advice on meter. pete
Title: Re: SR/F headlamp wattage
Post by: DonTom on November 11, 2020, 12:38:02 AM
Quote from: petewarm on November 10, 2020, 11:57:20 PM
Just got headlamp off. Phew!  what a tight fit.

Back of headlamp says:

12V 1.6W (PL)
12V 14.7W (LB)
12V 20.2W (HB)
Which all seems very low.

Ill measure them tomorrow. Thanks fro advice on meter. pete
Is it a LED lamp?  They don't waste much wattage in heat, so they will be a lot lower in wattage for the same brightness.

-Don-  Auburn, CA
Title: Re: SR/F headlamp wattage
Post by: walrus on November 11, 2020, 12:38:35 AM
Does it not already have LED lights??
Title: Re: SR/F headlamp wattage
Post by: aarfeldt on November 11, 2020, 06:52:10 PM
Quote from: petewarm on November 10, 2020, 11:57:20 PM
Just got headlamp off. Phew!  what a tight fit.

Are you able to adjust the low-beam and high-beam individually ?

When my low-beam is good, the high-beam lights up the moon, which makes it useless.
I know this is a common problem, but I need to get it sorted.
Title: Re: SR/F headlamp wattage
Post by: petewarm on November 11, 2020, 10:44:14 PM
I just measured the voltage and power draw:
SR/F headlamp electrical test            Voltage   13.1   
                  
   terminal   1   2   3   4   [bar between 3and4]
Main Beam                  
   Amps   0.18   1.61   0.45   0.45   
   Watts   2.4   21.1   5.9   5.9   
Dipped Beam                  
   Amps   0.18   1.38   1.19   0   
   Watts   2.4   18.1   15.6   0.0   
                  
Summary:      Halo   Main   Dip   signal?   
      2.4   21.1   15.6      
   label:   1.6   20.2   14.7      
On SR/F Dip stays om when Main beam activated                  
Therefore: Wattage to match for round headlight to fit fairing:                  
         35   15   Watts   

So the rating on the back is spot on, but doesn't count the main and dip being on together.
The forth pin is weird, and I presume its some sort of signal line, maybe not DC, which is what I was measuring.
Any body any ideas about this? pete.