I have a 1996 chevy blazer xtreme. They put after market led headlights on it. When I hit a bump or while driving they will start to flicker and my gauges and radio will cut on and off and the truck will start to act like it will die. Any help would really be appreciated thank you so much

 

LED or HID?

Are the headlight assemblies themselves aftermarket (like the halo projector style ones) or are they factory light assemblies with just the aftermarket bulbs in them?

Have you pulled the lights out yet to check out the wiring or anything behind them?

A scenario I could see happening is them being HID's with bad wires from being poorly routed. HID's have a ballast box that converts the vehicles 12v to the higher voltage needed by the HID bulbs. If the higher voltage wires between the ballast and the bulb have rubbed against something and chaffed through the wires coating, and the internal wire is bumping up against bare metal and grounding out when going over bumps, that high voltage suddenly surging into the ground circuit could be making everything go crazy as you described.

The good thing is, aftermarket HID ballasts are powered by the original 9006 bulb plug, so you could simply unplug and ditch the entire HID setup, put a regular 9006 bulb back in the place of the low beam bulb where the HID bulb use to be, and plug it in to the harness that the HID ballast was plugged into.