Have an 88 gta with digital dash. Installed LED headlights from screaming chicken. My drivers information center (DIC) now displays I have headlight issues. Also my left turn signals no longer work. Right signals work. How can i fix this issue?

 

https://www.thirdgen.org/forums/auto...ml#post6406433

 

The same message came on for me recently after upgrading to led headlights.

 

You apparently have headlights with "Lamp Monitor". Functional description is on page 1463 of the 88 Firebird service manual, https://www.thirdgen.org/forums/tech...ce-manual.html

There is a comparator circuit that checks the headlights and a message will appear in the DTC if doesn't pass that comparison. I think maybe it compares current, so a circuit resistance imbalance between headlight bulbs would maybe cause the fault warning to appear.

 

Screaming chicken sent me resistors for the headlights. That seem to work. occasionally the " F lamp" message would pop up on the DIC. But, after I upgraded the positive and negative wires on the battery and to the engine and frame, I have not received that message. I didn't do the "big 3" upgrade because of this issue. did it because bigger stereo, bigger alternator, fans etc. but since that seemed to fix it, sounds like i possibly had a bad ground somewhere. Now the DIC says PONTIAC like its supposed to do when there isn't a problem.