I'm pretty sure it's a ground issue

jct

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68 newport custom With parking lights on my left turn signal indicators on the dash and on the fender is dimmly lit, it goes away when the headlights are on.

Right side cornering light isn't lighting up bulb is good. Left side works. Used to work not to long ago.

I did upgrade my headlight wiring harness and upgraded my headlights with H4 and H1 bulbs and hella fixtures

Think it might be my headlight switch? I haven't gone behind the dash in a couple of years now.
 
Retrace the steps of your recent headlight upgrade, especially if everything worked prior. It's always a good idea to check your ground too. Good luck.
 
Bad ground at right cornering lamp and backfeeding into the dash/TS switch.
Run a jumper wire for a good ground as process of elimination.
Take two aspirins and call me in the morning.
 
I think he has 2 bad grounds. One at either socket for the left parking lights. One or both of them are seeking ground through the turn signals. The other like you said is the right cornering light.
 
I'll get around to it when the weather gets a lot warmer and i literally have no space in front of the car to work on the headlights and wiring
 
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