Left Blinker Issues

67Dart273 said
Sorry but this makes no sense........you take what bulb out of what socket?

Let's review "how this works"

The signal switch only has so many power inputs, all separate:

1....brake light power from the brake light switch, anytime the brake pedal is pushed

2...full time power from the hazard flasher which is separate

3...Power from the TS flasher when the key is in "run."

OUTPUTS

4....left rear stop/ turn
5....right rear stop/ turn
6....left front turn AND DASH INDICATOR
7....right front turn AND DASH INDICATOR

GROUNDING. Not only must the bulb have a good connection to the lamp shell, the lamp shell then has to have a good ground to the body. This varies from model year. Some years have dedicated grounds connected to the lamp shell and a jumper to the body. GOOD TO ADD if you don't have

Bulbs...........SEVERAL things can happen to bulbs. The filaments can get stuck together causing interesting "cross" talk. Some guys quickly check the bulbs and think they are good when one filament might be bad. THESE ARE ESSENTIALLY two bulbs in one. BEST WAY to test them is to LIGHT them in a spare/ junk socket --which you should have for a test device, anyhow-- across a battery

I took the bulb out of the bulb socket in the front left blinker, the part that the bulb itself pushes/twists in to. If I am using the wrong terminology for the "plug" where you put the bulb and subsequently put into the housing I apologize, but that is what I am referring to. When I remove the bulb the dash indicator works again. The rear left blinker works regardless. I used a test light on both left and right, and get blinking light on the front right, nothing on front left, and confirmed that the ground terminal in the socket is fine on both sides. Just no power to the bulb on the left side.

I pulled the bulb from the front right blinker, which works fine, and tried it in the front left and same result. I dont think the bulb is the culprit. Ran a ground cable from the bulb housing in the grill to ground and same result. Maybe I am not grounding the housing from a good spot?