I did a complete swap from a 1998 into a 1990 I changed all the wiring harness. Everything came out great except the front blinkers. The 1998 harness expects more amps to be used due to it having two large bulbs and the little bulb on each side. The 1990 blinker only have the one large bulb and the small bulb for the side marker. Without the extra bulb the blinker does a rapid blink like when you have a bulb out. What are my options to fool it into thinking all the bulbs are in place. I learned that the larger bulbs draw from 2 to 2.5 amps. Would it be a resistor or diode maybe to permanently put in place to fool it?

 

It was a simple fix with a EP27 flasher unit from Autozone. The flasher was designed to use with both conventional bulbs and led.

 

Nice to see someone answer their own question. Thanks for posting the solution.