This is a discussion on H4 halogen headlight dims under load? within the Grom Gear and Accessories forums, part of the Honda Grom Garage category; Originally Posted by WV_Grom Put your VOM across the battery terminals and then retry the test (RPM). Best if your meter has a dial vs ...
So same as before, was 14.24v at battery with raised rpm.
The interesting part was 8v at bulb with lamp on and 18v ?! at connector with no bulb?
I wasn't able to check if revving it had any effect, not enough hands.
Bottom line, swapped back to LED. Same bulb but different driver. I tried the old setup again, still no low beam, then swapped a new driver and low beam on the old LED bulb worked. Old driver was noticeably warm when I pulled it, so that must have been defective.
LED bulb is unaffected by rpm, just wicked bright all the time.
2015 OG Grom in Yellow - AODRacing loop exhaust, ContiScoot tires, EBC HH front pads, RideItMoto levers, Renthal kevlar grips, Road low bars, CJR ECU, TB cam, MNNTHBX Mtake, Outerwears, Koso temp gauge, short shift linkage, TST sliders, Aliexpress tail tidy, Aliexpress axle sliders
Pending - oil cooler, CoreMoto braided lines, high mount exhaust, rearsets and GP shift conversion