Tried replacing all my 2003 Z06's external lights with LED asemblies (except headlights of course). There are a couple of internet sources which sell multi LED modules assembled as direct replacements for all the 3057, 4057, 194's, etc. The first thing I learned is that the circuit resistence changes when the filament bulbs are replaced by the LED assemblies. The solution, according to the vendors, is to put either a 3 or 6 ohm resistor across the + and - wire to each of the car's turn signal lights. They provided nontechnical diagrams for those who have blinker bulbs alone, i.e., Euro rear light assemblies, and those who have multi-filament bulbs that double as brake lights, i.e., standard U.S. C5 rear light assemblies. I did the bulb / LED assembly swaps, installed the resistors where I thought they belonged and gave it a few days to stabilize. It didn't. Flasher switch blinked the turn signal LED's at least twice as fast as the filament bulbs (resistors were supposed to take care of that), then, to use a technical term, electrical weirdness manifested itself:
1) cruise control worked intermittently
2) daylight driving lights would wink out when the brake pedal was pressed
3) during the daylight, all inside dash lights (like the clock LED, radio LED, ambient temp LED, etc.) would dim when the brake pedal was pressed
4) at night with the headlights on, the brake lights would come on and stay on, not changing when the brake pedal was pressed
I went back to the stock filament bulbs, yanked the resistor assemblies from the turn signal lights, and everything returned to normal.
I had heard that the C5's BCM was real sensitive to any non-stock after-market electrical thingy's put online. Seems to be the case. Luckily, no permanent damage (yet).
Any EE's or people experienced with the C5's lighting system have any comments or suggestions?
:usa:
1) cruise control worked intermittently
2) daylight driving lights would wink out when the brake pedal was pressed
3) during the daylight, all inside dash lights (like the clock LED, radio LED, ambient temp LED, etc.) would dim when the brake pedal was pressed
4) at night with the headlights on, the brake lights would come on and stay on, not changing when the brake pedal was pressed
I went back to the stock filament bulbs, yanked the resistor assemblies from the turn signal lights, and everything returned to normal.
I had heard that the C5's BCM was real sensitive to any non-stock after-market electrical thingy's put online. Seems to be the case. Luckily, no permanent damage (yet).
Any EE's or people experienced with the C5's lighting system have any comments or suggestions?
:usa:
