1995 Chevy 1500

I tried taking the bulb out and seeing if it would come back on. (It wouldn't) my Lights are all hooked up to my alarm system. They call work correctly when I arm and disarm my alarm. I took apart the assembly for the park lights and cleaned it. (There was no shorts or frayed wires) I have no idea what it could be. It all started from changing a single park light bulb. (I even put the bulb back in) and it works when I arm and disarm my alarm. I checked my ground from the park light assembly as well. It is connected well. My turn signal on the side that I replaced the bulb blinks very fast while the side I didn't touch blinks normally. Any ideas with that being said?

Also I didn't include I don't have any tail lights. But all works fine when I arm and disarm my alarm. Just doesn't work when I turn the headlights on to drive with. (no dash lights, tail lights or park lights)

How would the alarm system get connected to your lights? Is it an aftermarket alarm? None of this makes sense with a light bulb. Fast flashing turn signal light on the dash indicates a burnt out bulb, or a no connection somewhere on that side. You may want to try and reset the alarm system.

1st off i've never seen an alarm, factory or aftermarket that didn't wasn't connected to and didn't affect the lights. I'm hoping you didn't feel the matching that you converted anything to LED ? If not, my question to you would be.. did you match up the numbers of the bulbs and inspect the socket (& compare )everything at the base and the filiments inside the glass of the new and old bulbs ? I always start with the basics and work my way up to what is more work, money and time consuming to do. It's not unheard of for a person to give you the wrong part(s) or having your headlight switch go out at a coincidental moment. The alarm system bypasses the switch, but your switch is almost undoubtedly ok. If it's neither the new bulb (it's also possible that the new bulb is 180 degrees out, sometimes that really matters) nor the socket. Testing for ground and power to & from your light switch is the only other place I would check for faults. This all after being sure the new bulb is correct and identical to the old one and the alarm is illuminating your parking/running lights. I wish I had more than this for you. Good luck , start easiest, cheapest & simple then go from there.