Replace the turn signal lamp - 2000 Kia Sportage

You replaced factory bulbs with led bulbs ? There is no relay BCM - body control module does it
Turn Signal Lamps
The body control module (BCM) is responsible for controlling the turn signals and hazard lamps. When the turn signal switch is placed in either the left turn or right turn position, the BCM receives a signal from the turn signal switch. The BCM then sends an on-off voltage signal to either the left or right turn signals and their instrument panel cluster (IPC) indicator. When the hazard switch is pressed, the BCM receives a signal from the hazard switch. The BCM then will send an on-off voltage signal to all the turn signal lamps. All the turn signal lamps will flash including both IPC turn signal indicators.

Put the stock lamps back . LED's won't work .

The turn signal lamps may only be activated with the ignition switch in RUN or BULB TEST position. The T/SIG fuse supplies ignition voltage to the turn signal switch. When the turn signal switch is placed in either the left or right position, the turn signal switch sends an ignition voltage to the hazard lamp/turn signal flasher, which sends an on-off signal to the turn signal switch. When the turn signal switch receives the on-off signal it will send that signal to the following lamps on the LH or RH side:
• The Rear Turn Lamp
• The Turn Signal Indicator
• The Sidemarker Lamp
• The Sideview Mirror (Pontiac Thunder only)
The turn signal switch also sends a separate on-off signal to the Daytime Running Lamps (DRL) control module, which relays the signal to the appropriate front turn signal. The front turn signals are grounded at G101 and G102. The rear turn signals are grounded at G401. The sidemarker lamps are grounded through the corresponding front parklamp.
The sideview mirror turn signals are a bank of LEDs placed behind the mirror glass.
The hazard lamps operate on battery voltage. The HAZARD fuse supplies battery voltage to the turn signal switch. When the hazard switch is pressed, the turn signal switch sends battery voltage to the hazard lamp/turn signal flasher, which sends an on-off signal to the turn signal switch. The turn signal switch send the on-off signal to all the turn signal lamps, causing all the lamps to flash including both IPC turn signal indicators. The hazard lamp/turn signal flasher is grounded at G200.
When the parklamps are ON, the sidemarker lamps receive voltage from the park lamp supply voltage circuit and illuminate. The sidemarker lamp is grounded through the corresponding rear turn signal. When the turn signal switch is place in the left or right hand position, the rear turn signal illuminates and the sidemarker lamp will loose its ground, causing the sidemarker lamp to turn off when the turn signals are on and to illuminate again when the turn signal is off.

Do you know how to test automotive electrical circuit's using a wiring diagram an a DMM - digital multi-meter ? Do you know what a factory diagnostic flow chart is ? This will not set any diagnostic trouble code's in the BCM - body control module . Looking at factory symptom chart , their is no diagnostic trouble chart for your symtoms . Have four choices .
Hazard Lamps Always On
• Hazard Lamps Inoperative
Turn Signal Lamps and/or Indicators Always On or Flashing
• Turn Signal Lamps and/or Indicators Inoperative
Which one would you use to diagnose this problem .
Or would you just view wiring diagrams an wing it ?

Turn Signal Lamps and/or Indicators Inoperative
Step
Action
Yes
No
Schematic Reference: Exterior Lights Schematics
Connector End View Reference: Lighting Systems Connector End Views or Body Control System Connector End Views in Body Control System.
1
Did you perform the Lighting Systems Diagnostic System Check?
YES - Go to Step 2
NO - Go to Diagnostic System Check - Lighting Systems
2
Verify that the turn signal lamps and/or indicators are inoperative.
Do the turn signal lamps and/or indicators operate normally?
YES - Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
NO - Go to Step 3
3
Are only the turn signal indicators in the instrument panel cluster (IPC) inoperative?
YES - Go to Step 4
NO - Go to Step 5
4
Test the inoperative turn signal supply voltage circuit to the IPC for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
YES - Go to Step 21
NO - Go to Step 13
5
Is only one turn signal lamp inoperative?
Go to Step 6
Go to Step 8
6
Inspect the inoperative bulb/socket for an internal short, poor terminal contact, or an open filament.
Was a problem found?
Go to Step 18
Go to Step 7
7
Test for an open, high resistance, or short to ground in the turn signal lamp supply voltage circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 21
Go to Step 16
8
Inspect the IGN E fuse and the FLASHER fuse.
Is either fuse open?
Go to Step 11
Go to Step 9
9
Test for an open or high resistance in the following circuits:
• The turn/hazard flasher battery positive supply voltage
• The turn/hazard flasher ground
• The turn signal switch ignition 1 supply voltage
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 21
Go to Step 10
10
Disconnect the multifunction switch, turn signal switch.
Test the multifunction turn signal switch for continuity between the multifunction turn signal switch ignition 1 voltage input terminal and the turn signal flasher signal output terminal in each respective position. Refer to Circuit Testing in Wiring Systems.
Is continuity present?
Go to Step 12
Go to Step 14
11
Test the following circuits for a short to ground:
• The multifunction turn signal switch ignition 1 voltage
• The turn/hazard flasher supply voltage
• The left turn signal switch signal
• The right turn signal switch signal
• The left turn signal lamps supply voltage
• The right turn signal lamps supply voltage
• The trailer left rear turn/stop lamp supply voltage
• The trailer right rear turn/stop lamp supply voltage
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 21
Go to Step 14
12
Test the following circuits for an open or high resistance:
• The multifunction turn signal switch ignition 1 voltage
• The turn/hazard flasher supply voltage
• The left turn signal switch signal
• The right turn signal switch signal
• The left turn signal lamps supply voltage
• The right turn signal lamps supply voltage
• The trailer left rear turn/stop lamp supply voltage
• The trailer right rear turn/stop lamp supply voltage
Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 21
Go to Step 15
13
Inspect for poor connections at the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 21
Go to Step 17
14
Inspect for poor connections at the multifunction turn signal switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 21
Go to Step 19
15
Inspect for poor connections at the turn signal/hazard flasher module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?
Go to Step 21
Go to Step 20
16
Repair the ground circuit of the inoperative lamp. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?
Go to Step 21
--
17
Important: Perform the set up procedure for the IPC.
Replace the IPC. Refer to Instrument Cluster Replacement in Instrument Panel, Gages, and Console.
Did you complete the repair?
Go to Step 21
--
18
Replace or repair the inoperative bulb/socket.
Did you complete the repair?
Go to Step 21
--
19
Replace the multifunction turn signal switch. Refer to Turn Signal Multifunction Switch Replacement in Steering Wheel and Column.
Did you complete the repair?
Go to Step 21
--
20
Replace the turn signal/hazard flasher module.
Did you complete the repair?
Go to Step 21
--
21
Operate the system in order to verify the repair.
Did you correct the condition?
System OK
Go to Step 3

What fuse are you pulling ?

Hazard Lamps
The hazard warning switch is part of the turn signal switch. The turn signal switch receives battery voltage at all times through the HAZARD SWITCH Fuse. When the hazard switch is placed in the HAZARD position, battery voltage is applied to the hazard lamp/turn signal lamp flasher. The hazard lamp/turn signal lamp flasher sends a turn signal flasher signal to the turn signal switch. The turn signal switch provides all of the turn lamps and turn indicators with the turn signal flasher signal, simultaneously flashing them on and off.

Turn Signal Lamps
The front turn signal lamps are made up of the front park/turn signal lamps and rear turn signal lamps. The front turn signal lamps flash with the rear turn signal lamps when a turn is initiated using the turn signal/multifunction lever. The turn signals will operate only with the ignition switch in the RUN position and will not operate during hazard flasher operation.
When the ignition is turned to the RUN position, battery voltage is supplied to the TURN SIGNAL Fuse. Battery voltage is then applied through the turn signal fuse circuit to the turn signal switch. When the turn signal switch is placed in the LH or RH position, voltage is supplied to the hazard lamp/turn signal lamp flasher. The hazard lamp/turn signal lamp flasher supplies a turn signal flasher signal to the turn signal switch. With the turn signal switch in the LH or RH position the corresponding turn signal indicator, rear turn signal, and front turn signal receive the turn signal switch signal and will flash. The front turn signals receive the turn signal switch signal from the turn signal switch via the BCM. The turn lamps are permanently grounded.

Replace the turn signal switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering Wheel and Column - Tilt.

Turn Signal Lamps
The turn signal lamps may only be activated with the ignition switch in RUN or BULB TEST position. The T/SIG fuse supplies ignition voltage to the turn signal switch. When the turn signal switch is placed in either the left or right position, the turn signal switch sends an ignition voltage to the hazard lamp/turn signal flasher, which sends an on-off signal to the turn signal switch. When the turn signal switch receives the on-off signal it will send that signal to the following lamps on the LH or RH side:
?€¢
The Rear Turn Lamp

?€¢
The Turn Signal Indicator

?€¢
The Sidemarker Lamp

?€¢
The Sideview Mirror (Pontiac Thunder only)

The turn signal switch also sends a separate on-off signal to the Daytime Running Lamps (DRL) control module, which relays the signal to the appropriate front turn signal. The front turn signals are grounded at G101 and G102. The rear turn signals are grounded at G401. The sidemarker lamps are grounded through the corresponding front parklamp.
The sideview mirror turn signals are a bank of LEDs placed behind the mirror glass.
The hazard lamps operate on battery voltage. The HAZARD fuse supplies battery voltage to the turn signal switch. When the hazard switch is pressed, the turn signal switch sends battery voltage to the hazard lamp/turn signal flasher, which sends an on-off signal to the turn signal switch. The turn signal switch send the on-off signal to all the turn signal lamps, causing all the lamps to flash including both IPC turn signal indicators. The hazard lamp/turn signal flasher is grounded at G200.
When the parklamps are ON, the sidemarker lamps receive voltage from the park lamp supply voltage circuit and illuminate. The sidemarker lamp is grounded through the corresponding rear turn signal. When the turn signal switch is place in the left or right hand position, the rear turn signal illuminates and the sidemarker lamp will loose its ground, causing the sidemarker lamp to turn off when the turn signals are on and to illuminate again when the turn signal is off.
Which blub an socket did you replace ? check the other blub ? The switch and or the flasher module can cause this problem .
Replace the turn signal switch. Refer to Multifunction, Turn Signal, and Hazard Switch Replacement - On Vehicle in Steering Wheel and Column.
Did you complete the replacement?

Which

PCB Relays
This vehicle is equipped with the following printed circuit board PCB mounted relays.
• High beam
• Low beam
• DRL
• Fog lamp
• Park lamp
• Stop lamp
• Horn relay
They are directly soldered to the underhood fuseblock circuit board. A failure of one of these relays will require the whole under hood fuse block to be replaced.

Turn Signal/Hazard Lamps
The body control module (BCM) is responsible for controlling the turn signals and hazard lamps. When the turn signal switch is placed in either the left turn or right turn position, the BCM receives a signal from the turn signal switch. The BCM then sends an on-off voltage signal to either the left or right turn signals and their instrument panel cluster (IPC) indicator. When the hazard switch is pressed, the BCM receives a signal from the hazard switch. The BCM then will send an on-off voltage signal to all the turn signal lamps. All the turn signal lamps will flash including both IPC turn signal indicators.

Vehicles are just not the same as they use to be. Electronics !!!!!

Here is what the service manual says. Looks like it is not a flasher relay but a function of the body control module.

TURN SIGNAL AND HAZARD WARNING LAMP SYSTEMSystem Description OUTLINE Turn signal lamp and the hazard warning lamp is controlled by combination switch reading function and the flasher control function of BCM.
TURN SIGNAL LAMP OPERATION - BCM detects the combination switch condition by the combination switch reading function. - BCM supplies voltage to the right (left) turn signal lamp circuit when the ignition switch is turned ON and the turn signal switch is in the right (left) position. BCM blinks the turn signal lamp.
HAZARD WARNING LAMP OPERATION BCM supplies voltage to both turn signal lamp circuit when the hazard switch is turned ON. BCM blinks the hazard warning lamp.
TURN SIGNAL INDICATOR LAMP AND TURN SIGNAL SOUND OPERATION - BCM transmits the turn indicator signal to the combination meter with CAN communication while the turn signal lamp and the hazard warning lamp are operating. - Combination meter outputs the turn signal sound with the integrated buzzer while blinking the turn signal indicator lamp according to the turn indicator signal.
HIGH FLASHER OPERATION (FAIL-SAFE) - BCM detects the turn signal lamp circuit status by the terminal current value. - BCM increases the turn signal lamp blinking speed if the bulb or harness open is detected with the turn signal lamp operating. NOTE: The blinking speed is normal while operating the hazard warning lamp.

Turn Signal Lamps
The LT T/SIG and RT T/SIG fuses located in the underhood fuse block supplies battery positive voltage to the body control module (BCM) for turn signal and hazard lamp operation. When the turn signal switch is place in either the LEFT or RIGHT position, ground from G202 is applied through the turn signal switch signal circuit to the BCM indicating the turn signal request. In response to this signal, the BCM applies a pulsating voltage to the front and rear turn signal lamps supply voltage circuits cycling the lamps ON and OFF. The BCM also sends a message via GMLAN to the instrument panel cluster (IPC) to cycle the turn signal indicator ON and OFF depending on the position of the turn signal switch.
Ground for the turn signal lamps is supplied as follows:
• G101 provides ground for the left front turn signal lamp
• G100 provides ground for the right front turn signal lamp
• G302 provides ground for the left and right rear turn signal lamps

The LT T/SIG and RT T/SIG fuses located in the underhood fuse block are also used by the body control module (BCM) for stop lamp operation.
The brake pedal position sensor is used to sense the action of the driver application of the brake pedal. The body control module (BCM) provides both, a 5-volt reference voltage and low reference to the brake pedal position sensor. The position sensor provides an analog voltage signal back to the BCM that will increase as the brake pedal is applied. When the brake pedal is applied, the BCM will then apply battery voltage to the left and right stop lamp supply voltage circuits and the center high mounted stop lamp (CHMSL) supply voltage circuit illuminating the stop lamps. At the same time the BCM signals the transmission control module (TCM) and the engine control module (ECM) that the brakes are applied. Ground for all stop lamps is provided at G302.
The stop lamps on this vehicle will not illuminate unless the ignition is in the accessory, run, or crank positions. When the ignition is in the OFF position the stop lamps will not illuminate when the brake pedal is applied.

Did you check the fuse's. ? Wouldn't think it's a ground because right an left tail lamp Assembly's use same ground ! Did you check for B+ voltage at the bulb. with a volt meter ? Power is supplied by the BCM . Could be the tail lamp assembly

3 wing nuts. here is the info needed.

Service Information

2005 Buick LaCrosse ' Allure, LaCrosse VIN W Service Manual ' Body ' Lighting Systems ' Repair Instructions ' Document ID: 1537542 Tail Lamp, Turn Signal Lamp, High Mount Stop Lamp, License Lamp, Backup Lamp Replacement - Rear


Callout
Component Name
Notice: Refer to Fastener Notice in the Preface section.
Fastener Tightening Specifications: Refer to Fastener Tightening Specifications .
Turn Signal/Stop Lamp Assembly Replacement - Rear 1
Nut, Turn Signal/Tail Lamp (Qty: 3)
Tip
Pull back rear compartment carpet to gain access to lamp.
Tighten
2 N·m (18 lb in)
2
Lamp, Turn Signal/Tail Lamp
Tip
Twist the bulb socket and pull inward to replace the bulb.
License Lamp Replacement 3
Screws, License Lamp (Qty: 2)
Tighten
2 N·m (18 lb in)
4
Lamp, License Lamp
Tip
Twist the bulb socket and pull inward to replace the bulb.

Tail Lamp: Service and Repair
TAIL LAMP REPLACEMENT
REMOVAL PROCEDURE
1. Open the rear compartment lid.
2. Remove the rear compartment trim panel (4).
3. Disconnect the tail lamp electrical connectors.
4. Remove the following components from the vehicle:
- The 3 nuts (3)
- The tail lamp (7)
5. Remove the following from the tail lamp:
- The stop lamp socket (2)
- The turn signal lamp socket (5)
6. Remove the following from the lamp sockets, if necessary:
- The stop lamp bulb (1)
- The turn signal lamp bulb (6)
INSTALLATION PROCEDURE
1. Install the following to the lamp sockets, if removed:
- The stop lamp bulb (1)
- The turn signal lamp bulb (6)
2. Install the following to the tail lamp:
- The stop lamp socket (2)
- The turn signal lamp socket (5)
3. Install the tail lamp (7) to the vehicle. Secure the tail lamp (7) with the 3 nuts (3).
NOTE: Refer to Fastener Notice in Service Precautions.
Tighten the tail lamp nuts to 10 N.m (89 lb in).
4. Connect the tail lamp electrical connectors.
5. Install the rear compartment trim panel (4) to the vehicle.
6. Close the rear compartment lid.