No relay's , wiring problems maybe . Viewing wiring diagrams an using a DVOM - digital volt ohm meter to test the electrical circuits is the way to find the problem . Blinkes flashing fast would indicate a bulb out or wiring problem or the switch .
Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts
Electric Testing Techniques You Need to Know
Free wiring diagrams here http://www.bbbind.com/free-tsb Enter vehicle info. year , make , model an engine size. Under system click on lighting , then under subsystem click on turn signals . Click the search button ,then the blue link .
The brake light's not working could be the brake light switch ,located on top of the brake pedal arm (linkage) . Test for B+ voltage into the switch an out when pushing the brake pedal .
SOURCE: left tail light @ blinker out
check the bulb contacts for corrosion, also check inside the bulb holder
SOURCE: 2001 ford explorer sport trac
Just found the answer on another site. Sure enough went out removed the 3 philips head screws in the steering column opened it up and walla a wire connection had pulled itself free. When my son uses my truck he always uses the tilt steering, when I get in I have to readjust it. because of this the wire connection pulled itself out. I simply pushed it back in an blinker and brake light are now working. My husband is now trying to figure a way to secure the wire connection so it doesn't pull itself out again. Hope this helps others, either by saving the cost of a dealership or machanic or from getting rear ended.
SOURCE: 1998 Ford Explorer blinker problems
Have you checked the contacts to make sure they have good contact with the bulb base? I have a 1995 Ford Contour. The turn signal went out. I replaced the bulb and it would work when it wanted to. I checked the contacts and sure enough they weren't making good contact with the bulb. I took a screwdiver and slightly bent the contacts a little. It has worked good ever since.
SOURCE: 2007 Ford Edge: Rear Blinkers/Brake Lights out; Not bulbs or fuse
Sounds like you need bulbs on both rear side lights. Does the blinker flassh really fast?
SOURCE: 1994 Chevy C1500 truck. No rear brake lights
Most likely this is a brake light switch issue. Replace switch.
If your emergency flashers don't work, all flasher bulbs are fine, but flashing too fast, then check and replace Hazard light switch.
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