Quote Originally Posted by wstefan20 View Post
Wouldn't load resistors equivalent to the resistance value of each bulb in series with the led fix this issue? Maybe I'm not understanding the fault... new to leds lol
Quote Originally Posted by Bronco Boy View Post
You would think so. In this case, they did work, but then stopped working. Maybe some other factor in play? This is what I hate about LED's. LOL
Well yes and no lol. The load resistors were what I thought a permanent fix. Now it did fix the 3rd brake light and cruise control feature which probably works fine now with the incandescent bulbs back in the turn signal locations on the cluster lol. There were times when I thought the connection was loose and the driver side turn signal indicator would display as being "ON" in the HUD display as if the bulb was out. It would also light up the bottom two LED's on the driver side Muth mirror. I never thought much about it because a little wiggle of the wires with the load resistor and the issue went away. This last time it did not go away with a wiggle of the wires and thus I took it apart this weekend to inspect if something was loose.

Recently I replaced the cluster LED's on my 2002 Camaro. I did not order enough so I was short two for the turn signal indicators. This car has no load resistors but rather the appropriate LED flashers. So when I received the two LED's I was short I swapped them them into the turn signal indicators. When I tested them out with the turn signal lever and flasher, only one side would blink. The other side would not make a noise through the flasher or blink internally and externally. As soon as I put the incandescent bulbs back into the cluster the issue was gone and everything worked together.

This is what caused me to swap put the bulbs in the cluster of the Grand Prix. It seems to be working fine.

GM wiring at it's finest and the quirky LED behavior.