nI have a 2004 Toyota 4Runner that the left front blinker is blinking fast and not working. All the other blinkers in the car are ok. I replaced the bulb and it is still not working. What do I need to replace?
Bulb out = less load on the flasher circuit and will increase the speed of the flasher. You still have a problem with the bulb or socket. Clean out the socket with an electrical cleaner or spray and then put a small amount of dielectric grease on the termination points. You may have to bend the tabs out a little in the socket with a small screwdriver if there is a bad connection to the terminals on the bulb.
Above answer is great, 99% of all electrical problems are caused by bad connections. If that's not the problem you must trace the wiring and look for bad spots (broken insulation resulting in wire corrosion, etc.)
Search Toyota 4Runner Questions
Toyota 4Runner Experts
Related Models For Sale
Used Cars For Sale