According to Sylvania the rear turn signal bulb should be a 4157. You could possibly have a faulty bulb socket due to loose terminals that will make a break contact with the bulb, thus the bulb that worked for a day. You can do some basic circuit tests at the socket to check for power and ground as this will verify if your issue is with the bulb or the circuit/s. I attached a basic test with a voltmeter to verify power and ground with the turn signal switch in the right turn position with the key on. If you don't show voltage place the ground lead on a good chassis ground, if it then reads voltage. Bam! A bad ground, to which you can either wire in your own ground or hunt for the broken/corroded wire. If there is still no voltage reading after trying a different voltmeter ground, remove the column shroud to access the switch and check voltage at the yellow wire, if no voltage there=bad switch, If voltage good, trace the circuit until you find the broken wire or run your own wire from the switch to the rear (no fun). Hope this helps!
Friday, November 8th, 2019 AT 11:29 AM