Check fuse 7 (15 amp) under the left side of the dash. If the fuse is good, the problem is in the rear electronic module. The two back-up lights are individually controlled by this module. The module is behind the panel at the right rear of the vehicle. The white/yellow wire (terminal 10) goes to the right rear lamp and the dark green/orange wire (terminal 9) goes to the left lamp. Now the good news. The rear electronic module gets the signal to turn the lamps on from the powertrain control module. Unless the fuse is bad, this may be more than you can deal with. Take it to Ford or another mechanic that understands the programming involved. Carl
Bad bulbs can be the cause of your reverse lights not working on your 1999 Toyota Tacoma. A problem with the reverse switch or bad wires can also be the cause of your reverse lights not working.
Check the circuitry to the backup lights. The same fused circuit is probably used for both brake lights and backup lights. As you go past Reverse, the backup light probably is turned on briefly, causing the fuse to blow. It's just a thought, but I'd think it worth checking.
Having it on "PARKING"
Blown fuse or defective brake light switch.
head lights won't work, no power to them, signal works , reverse lights work
Backup Lights do not workThe backup lights are on a separate circuit from the brake lights and each use a separate dedicated switch to control when each group of lights turn on and off.The type and location of the backup light switch depends on the make, model, and year of production of a vehicle, and since I'm not familiar with your vehicle, this answer of necessity will be generic in nature.The backup light switch is usually mounted either within the dashboard or, in the engine compartment. In either case, it will be mounted directly adjacent to a moving part of the gear shift mechanism. Thus when the transmission is shifted into reverse, the moving linkage will move the switch, turning the backup lights on.However, on many later model vehicles, the backup light switch may be mounted by screwing into the side of the transmission so that when the transmission is shifted into reverse, the backup lights are turned on.In the case of the switch mounted in the dashboard area or engine compartment and working off of the movement of the transmission shift linkage, the cause of failure to operate could be:Switch is not properly adjusted [very common].A connector or wire in the circuit has become disconnected, cut or broken [slightly less common].The switch itself could be defective [not very common].These same causes are true for brake light switches mounted into the side of a transmission, except that I'm not aware of them being adjustable and thus if the switch is the cause it's defective and replacement of the switch is required.
Reverse light switch bad or out of adjustment.
Did you check the light bulbs? If OK, probably a bad reverse light switch in tranny.
There is a switch on the shifter or trans that turns on the lights when the vehicle is placed in reverse, it is out of adjustment or faulty. And don't forget the bulbs or fuses as a cause.
In those tail lights there is a circuit board. If it goes bad it will cause all kinds of problems.
the most common thing is a faulty multifunction switch.
battery is low or almost dead
possible electric system short
Defective switch, switch not adjusted, blown fuse
A blown fuse, a faulty ( or dirty ) reverse light switch, faulty wiring, a blown bulb or a poor ground could cause reverse lights not to work. If one light doesn't work it's likely to be a blown bulb, faulty wiring or a poor ground. If both don't work it's probably a blown fuse, a faulty reverse light switch or faulty wiring.
Cracked electrical wire caused this to my car once.
Perhaps something in the gear shift that turns on the lights when in reverse position.
intermitten problems are the worst to figure out i would first start by changing the bulbs then i would change the wiring harness. i know i had a car that when the tail lights were on the blinkers wouldn't work and it turned out to be a short in the harness.
try the neutral safety switch
It could be caused by a bad ground or severed wire somewhere.
I would suspect the transmission range sensor / neutral safety switch.This has been known to cause all sorts of strange electrical related problems.See "Related Questions" below for more
Check the fuses first. If the fuses are ok check the reverse switch. The switch is under the dash on some models, and on the transmission on others. A bad or misaligned switch is the most likely cause for no back up lights.
ck bulbs first then ground circuit and power on trunk lights.Ground most likely
You have a short to ground. Look on your trans for a wire that is frayed/damaged etc from the reverse indicator. If you don't find any there, look around your reverse lights in the rear.
One thing that will cause this is when a door-ajar warning goes without fixing.My Windstar rear hatch showed as ajar for quite some time - after a period, this caused the interior lights to be disabled.Flooding the hatch latch mechanisms with spray lubricant, i.e., WD-40, cleared the false ajar warning, and the interior lights automatically starting working again.See "Related Questions" below for more