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Left front turn signal does not flash. Left rear OK. socket was corroded so I replaced socket. No flash. Checked wires for voltage, only the parking light connection ever gets anything. Front and rear circuits differ in that the rear also doubles as the brake light. Any ideas? I'm thinking the steering column switch...
Re: Left front turn signal does not flash. Left rear OK....
Try pushing the Hazard switch on the Column several times and see if it restores the connection. From what I understand about the Multifunction Turn switch is that some of the contacts share connections with the Hazard Button.
The contacts work on a type of derailer setup and when the contacts get dirty or wear, things stop working. Moving the Hazard switch resets the points and springs each time you go in and out of the Hazard setting.
If your brake light is working you know the wires to the light socket from the brake switch are okay. Probably would not hurt to check brake light switch as it shares the common wire. The split between the left turn and right turn signal wire has to occur, yet the opposite brake light will stay on steady while the other side blinks.
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other shoe falls off, do parks work on all corners of car.??????
not told at all front of car, why skip the most good clue of all?
if the front left failing, blinkers>?
avoid use of word driver, say left , if is left
ford sells cars all over the earth,, my answer is USA only.
left front and left rear failing, that?
if only left rear fails
look for bad trailer hitch wiring, there now or hacked in by goods
or was there and wires remaining there or wreck.
and ground.
to prove ground is good takes voltmeter skills after looking shows ok.
here is that skill called a ground voltage drop test.
2 ways to do it using battery ground works best but here is simple
blinker flash up front now left. make that happen firs.
meter has 2 leads. DMM set to 20vdc range or auto.
connect meter lead to lamp shell housing metal ,
lamp socket real ground, metal shell.
then the lead to car metal body, press hard to dig in to paint
if the meter shows voltage at all , ground is bad on this car, here.
end volts drop
or move the meters ground to battery neg, lug ,long wire to rear
the spec on cars ground max drop is 0.5vdc max .
one half of a volt. max.
0vdc is expected,
expect trailer hitch hacks , and bad connectors there. green rust
aka copper oxide.
Both front an back signals ? You would need to look at a wiring diagram to see what or if these circuits have anything in common . Probably both of these have a different ground point , looking at a wiring diagram i see the front ground is G100 an the rear is grounded at G302 .
Turn Signal/Hazard Lamps
The IGN E 10-amp fuse in the underhood fuse block supplies battery positive voltage to the turn signal/hazard switch assembly. The FLASH 25-amp fuse in the instrument panel (I/P) fuse block supplies battery positive voltage to the turn signal/flasher module and ground is supplied at G200. When the turn signal switch is placed in either the LEFT or RIGHT position, a voltage signal is completed from the turn signal switch to the turn sign/flasher module. When the hazard flasher switch is activated, a ground signal is completed from the turn signal/hazard switch to the turn sign/flasher module. The turn sign/flasher module then sends an on-off voltage signal through the LT TRLR, RT TRLR, LT TURN or RT TURN 10-amp fuses in the I/P fuse block to the appropriate turn signal or to all 4 fuses for hazard operation. The instrument panel cluster (IPC) indicators receive voltage from the LT TURN and RT TURN fuses as well as the driver door module (DDM)/passenger door module (PDM) for the mirror turn signals. The DDM/PDM has no function or control of the mirror turn signals other that a pass through connection for the circuits. The audio chime is also activated when the turn signals are ON. When the hazard switch is pressed, all turn signal lamps will flash including both IPC turn indicators. The front turn signals are grounded at G100. The rear turn signals are grounded at G401. The Mirror turn signals are grounded by the DDM/PDM.
Possably the turn sign/flasher module is going bad .
The flasher is under the dash.If you turn on the signal listen for it's location.Turn on your 4 way flasher and see if the left rear light is flashing.If it's not then replace the bulb.If it still does'nt work after replacing the bulb check if there is power to the socket. Use a probe light.If no power to the socket.There is a break in the wire or worse the signal switch may be the culprit
Fast flashing usually indicates that one of the exterior bulbs isn't functioning. You've checked front and rear signal lights, right? If the bulb is good, it could be corrosion in the socket, bad ground, broken wire, etc.
Check the socket that holds the bulb at the left rear. Make sure it's clean and wires are in it. Next make sure you have power and ground in socket. If you have all that try another bulb.
it's the grounds if they're both flashing fast it's definitely grounds take a test light and see if its got power goes through the test light grounded to the frame and if the light comes on then it's definitely your grounds
Do you know what a wiring diagram is ? How to use a DVOM - digital volt ohm meter ? Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year make ,model and engine size. Under system click on lighting ,then under subsystem click on turn signals . Click the search button then the blue links .Check power an ground circuits ! This is how we diagnose electrical faults , not just replacing parts .
Turn Lamps
Voltage is applied through the TURN fuse and the turn/hazard flasher when the ignition switch is in the following positions:
• RUN
• BULB TEST
• START
The voltage travels to the contact in the hazard switch. The hazard switch is located in the turn/hazard-headlamp switch assembly. This contact is normally closed.
When the left turn signal is turned on, voltage is applied to the following components.
• The left turn indicator
• The left front park/turn lamp circuit 14
• The left rear turn lamp circuit 18
The turn lamps turn on immediately. The current flow heats up the timing element. The timing element is located in the turn/hazard flasher. The timing element repeatedly opens and closes the circuit. This action causes the turn lamps to begin flashing.
The voltage that is applied to the left front park/turn lamp is also applied to the left front marker lamp. If the headlamp switch is in the OFF position, the left front marker lamp will find a path to ground through one of the following lamps. The following lamps provide low resistance paths to ground:
• The right front marker lamp
• The right turn indicator
• The right front park/turn lamps
• The left front park/turn lamps
The left front marker lamp flashes with the turn lamps. The voltage drop across the marker lamp is much higher than the voltage drop across the other lamps. The lamps that are used for the ground path will not flash.
When the headlamp switch is in either the PARK or HEAD positions, voltage is applied through the following components:
• The EXT LP fuse
• The marker lamps
• The park lamps
When the left turn signal is turned on, the left marker lamp will have voltage at both connections. The left marker lamp does not light. When the turn/hazard flasher stops the voltage to the turn lamps, the marker lamp is grounded through the turn lamp. The marker lamp does not go on. The left front marker lamp flashes in the following manner:
• The left front marker lamp flashes on when the turn filament of the left front park/turn lamp goes off.
• The left front marker lamp flashes off when the turn filament of the left front park/turn lamp goes on.
Voltage is applied to the right lamps in the same manner, when the right turn signal is turned on.
Hazard Lamps
Voltage is applied at all times through the following components to the normally open contact of the hazard switch in the turn/hazard-headlamp switch assembly:
• The STOP HAZ fuse
• The turn/hazard flasher
When the hazard switch is turned on, voltage is applied to the following components:
• The front turn lamps
• The rear turn lamps
The following lamps flash on and off:
• All of the turn lamps
• Both of the turn indicators
The front marker lamps flash with the hazard lamps on, just as the front marker lamps flash when the turn lamps are on. If the headlamp switch is in the OFF position, the front marker lamps flash on when the hazard lamps are on. The front marker lights will flash on when the hazard lamps are on if the headlamp switch is in one of the following positions:
• PARK
• HEAD
When the hazard lamps are on, the following conditions apply:
• The turn circuit is always open.
• The turn/hazard flasher controls the lamp.
Park/Marker Lamps
Voltage is applied through the EXT LP fuse, to the headlamp switch at all times. Voltage is applied to the park lamps and the marker lamps when the headlamp switch is in the following positions:
• PARK
• HEAD
The front marker lamps are grounded through the turn filament of the respective front park/turn lamp. The front marker lamps light as a result.
Stop Lamps
Voltage is applied through the STOP HAZ fuse to the brake switch at all times. When the brake pedal is depressed, the brake switch closes. This action applies voltage through the turn/hazard-headlamp switch assembly to the following lamps:
• The high mounted stop lamp assembly
• The left tail/stop-turn lamps
• The right tail/stop-turn lamps
one of the lights has a ground fault, likely the ground wire is broken or badly corroded. so it could be either light on the affected side, check both front and rear light sockets for a ground wire or strap.(usually a black or green wire)
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