Join Date: Sep 2018
Feedback Score: 0 reviews
IIRC, in the newer trucks, the headlamp switch doesn't actually do the headlight switching. The power to the headlamps is controlled by a module (GEM), and your headlight switch only tells the module to turn the headlamps on or off.
The flicker is due to the SSR (solid state relay) in the module leaking a bit of current when OFF, and not having sufficient load on them (current passing through it) when ON. The LED lamps put very little [electrical] burden on the system, and will light at very low current levels, thus the OFF flicker. To test this, unplug the headlamp connector (at the lamp) and measure for DC voltage.
One remedy is to put a resistor in parallel with the lamp. This puts additional load on the SSR. However the downside is the resistors can get HOT! The big advantage of LED's is they draw less current than incandescent/halogen lamps, but adding resistive load to the circuit, you increase the current draw, which defeats the purpose (at least part) of having the LED's in the first place.
Lastly, did you check to see if your Hi-beams worked? I tried several different iterations of LED headlamps, in both my truck and my CrownVic Interceptor, and found none really gave good high-beam/low-beam performance. They were bright at low beam, but high was just barely any higher/brighter. I never had a flicker issue as both have old-school headlamp switches!
And... even though the LED's say they are "DOT approved", I can almost guarantee they are not. More Chinese CRAP! LOL
Al in SoCal
AFE Intake; Garrett 38R; DieselSite Turbine Jacket
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Last edited by Calico5; 11-07-2018 at 08:32 PM.