I copied this from an earlier question:
What could be wrong with brake lights, if not the switch, bulbs, or fuses?
The brake lights have stopped working in my Ford Explorer. The bulbs are new, the brake switch is new, the fuses are not blown. What else is there to check?
by Paul @ Bundy's Auto (becker@ThisisToPreventSpam-VKW-RemoveThis.wzrd.com) contributed on November 08, 2003, at 7:26pm. Last updated on November 10, 2003, at 12:26pm. Sounds like you've been doing some guessing! You need to find where the power stops. Use a test light at the sockets. If no power, go to the wire to the socket. When you find where power goes in but doesn't come out, you have your answer. Assuming there is one answer. There is also a possibility of a ground problem. Good luck.
It could be one of many possibilities. I had a brand new s-10 that I was working on and it would blow out the fuse at weird times. I ended up chasing it down to a bolt that was left under the carpet from the factory. the bolt had rubbed through the wire and would short out and pop the fuse.. sometimes electrical problems can be a bear......
A short in either the multifunction turn signal switch or a short in the wiring harness going to the switch.
The trunk
turn signal relay on 2000 f250 diesel
The 1994 Ford Ranger pickup truck turn signal switch can be found below the dashboard. The switch will be on the drivers side. The turn signal switch should be labeled as such.
Looking for Picture of Turn Signal Relay for a 1998 Ford Explorer.
A car that shuts off when the turn signal is used indicates a major short in the electrical system. When the turn signal is used, it cause a massive draw on the power and shuts it down.
A short in the turn signal switch or the wire in the steering column is shorted. There is more likely a short in one of the bulbs. easy to find remove bulbs until the bad one is found then replace
A short in either the multifunction turn signal switch or a short in the wiring harness going to the switch.
Could be there is a short to ground somewhere in the system or the circuit is overloaded with extras. If you have a trailer plug in back take a good look at that area for a short.
The turn signal relay is underneath the dashboard on the drivers side in the fuse box. If you are looking for the acutal turn signal its on the steering column.
short circuits in the turn signal and brake light circuits
There is a short in the wires in the turn signal circuit. The combination switch in the steering column is a good place to check. Do the hazard lights still flash?
A short in the turn signal wiring can cause the voltage gauge to fluctuate. A loose ground wire can also cause the gauge to fluctuate.
When replacing the rear turn signal on a 1999 Acura Integra open the trunk. Locate the rear turn signal housings and find the bulbs. Remove and replace the bulbs.
it's normally under the dash.. turn on the turn signal and find the device that is clicking. That shoudl be the flasher unit/regulator/relay
Yes - on passenger side of dash with turn signal and emergency flasher relays. Turn on your turn signal or e-flasher and listen for ticking - you'll find it...
In nearly every case the actual turn signal wires run from the bulbs in the turn-signal housings directly to the hazard switch. This is done to allow the hazard system access to the turn signal bulbs without having to run an additional set of wires out to each bulb just for the hazard system. To make this design work the primary turn signal system feeds the outputs it wants to send to the bulbs, located out in the turn signal housings, into the hazard switch itself. So the hazard switch is actually a multi-pole double throw switch that connects the actual turn signal wires from the bulbs to either the hazard circuit or to the turn signal circuit depending on the position of the switch control button/knob. So if you cannot operate the hazard switch because the knob broke off then it is likely stuck in hazard mode or somewhere in between and it cannot connect the bulbs wires to the turn signal system while in this state.