I Had the same problem on my 96, it ended up being my trailer wiring was wraped around the frame by to previous owner, and over time the vibs. rebed the insulation off the wires and caused a short in the system which will cause all kinds of electrical issues that would be tied to the trailer wiring system
Most likely you have a grounding problem in the left tail-light. See if the wire is disconnected, broken or if the grond wire connection is corroded where it connects to the body.
check the bulbs one is burned out
how do you replace a turn signal flasher on a 1999 ford ranger pickup
When the windshield wiper on a 2000 Ford Ranger comes on by itself this can signal a damaged windshield wiper switch. Changing these switches out often corrects this problem.
1989 silverado left turn signal set applying brakes causes the left turn signal to dim and the two right rear tail light bulbs to alternate brightly? Further problem occurs to same truck - in Park and brakes not applied -- if head lights are on turn signal flash slows right down almost to a stop and becomes very dim
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.
It sounds like the posative brake light wire is shorted out with the left turnsignal light wire. These are easily accesable in the trunk and also as a result eazily damaged. Locate the damaged wires and tape them up. Hope this helps.
where is the turn signal flasher on 2008 ford ranger
I could not be sure about your particular problem, but I had to replace the Multi-Function and Turn signal switches in a 96 Lumina for similar strange problems of Brakes and signals not working in particular scenarios.
Check the fuses for your brakes.
if your signal is faster than normal then you need a new bulb
if abs light is on, there is a problem in your brake system if the problem has already been repaired, disconnect battery for 5 minutes to cancel signal in computer. if problem has not been repaired, get it fixed otherwise signal and light will just keep coming back,not to mention your brakes will fail right when you need em most