Why would the third brake light work but the regular ones not work on a Pontiac Sunfire?

Answer 1

Check for a short in the wiring, because sometimes the wiring for the 3rd brake light and the usual brake lights are different. So maybe the wiring for the usual's is damaged. i had this problem too. i took it to my mechanic and he checked just about everything...in the end he just jiggled the hazard light switch on top of the steering columb and that fixed it...so it might just be a short in the system...hope that helps REMOVE POWER AT BATTERY FIRST The person that tried to fix it saved you about $150 cnd. It is in the hazzard lights. The contacts arc causing the plasic to melt. It can be fixed better if you release airbag and then remove plastic around signal switch. Remove the $150 signal switch.(3 screws).Disconnect wires(remove white plasic at connector)this takes a bit of playing to get the bottom screw. remove the torx screws and watch for to small spring in the signal switch.do in the house at table. there is a lever for the turn signal cancel watch how it works .Look at hazzard light switch area. You will see some brown or black at contact. slide hazzard light switch and it will feel sticky and the contacts will not touch. use a sharp knife to smooth the plasic and clean the contacts. put it back together use an ohm meter to check continuity between proper contacts. (see Haynes or Chilton manual. I forgot color code ) make sure signal cancel works. Put back together. Use of hazzrd lights causes this. they turn them on to check your lights during oil change tell them not to, and to put foot on brake and turn the signals on.