These does seem to have built-in resistors. I've used these in my '79 MGB and works like a charm. I've replaced, Rear/brake lamps and turn signals on my MGB, blinkers didn't flash and replaced thermal Flasher with an Electronic Flasher.OrientExpress wrote:The reason I asked is that I replaced all 4 turn signal bulbs with LEDs and got the fast blink response. I have yet to find any LED replacements that have a built-in resistor to fool the bulb-out detection.The bulb out blinker response is a double speed flasher and it will happen with replacing 1 LED in the system per side.
If I experience any issue with blinkers, I'll replace the flasher with an LED bulb Flasher Unit..