Tail light wiring diagram chevy c6500

You have no clue, guessing won't fix it , having wiring diagrams an using a DVOM - digital volt ohmmeter will. Testing an reading how they are suppose to work will. factory service info.

Turn Lamps
Battery positive voltage (B+) is supplied at all times to the turn signal/hazard flasher module in the hazard switch assembly from the rear fuse block T/SIG HAZ Fuse. The turn signal/hazard flasher module is permanently grounded. Battery positive voltage (B+) is supplied with the ignition switch in the ON or START position to the turn signal switch in the instrument panel from the rear fuse block IGN 1 Fuse.
When the turn signal switch is placed in the position to indicate a LH turn battery positive voltage (B+) is input to the turn signal/hazard flasher module Left Turn Input. In response to this input the turn signal/hazard flasher module supplies battery positive voltage (B+) in an on and off flashing pattern to the LH turn lamps and the instrument panel cluster (IPC) LH Turn Input. The LH turn lamps are permanently grounded so the LH turn lamps light when they have power, ground and turn off while power is removed. The IPC will also light the LH turn indicator.
When the turn signal switch is placed in the position to indicate a RH turn battery positive voltage (B+) is input to the turn signal/hazard flasher module Right Turn Input. In response to this input the turn signal/hazard flasher module supplies battery positive voltage (B+) in an on and off flashing pattern to the RH turn lamps and the IPC RH Turn Input. The RH turn lamps are permanently grounded so the RH turn lamps light when they have power and ground and turn off while power is removed. The IPC will also light the RH turn indicator.

Did the turn lamps operate properly?
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Go to Step 3
Go to Turn Signal Lamps and Indicators Inoperative - One Side
3
Disconnect the instrument panel cluster (IPC) connector.
Connect a test lamp between the inoperative turn signal input circuit at the IPC connector and a good ground.
Turn ON the ignition, with the engine OFF.
Move the turn signal switch to the inoperative turn position.
Does the test lamp turn ON and OFF with the turn signal lamps?


You people need to quit trying to play auto mechanic , you have no clue about automotive electrical circuits .

This vehicle has no flasher relay ,controlled by the BCM - body control module . Your best bet , take it to a qualified repair shop .
System Description EKS008N2 TURN SIGNAL OPERATION When the ignition switch is in the ON or START position, power is supplied ? through 10A fuse [No. 1, located in the fuse block (J/B)] ? to BCM (body control module) terminal 38, and ? through 10A fuse [No. 14, located in the fuse block (J/B)] ? to combination meter terminal 22. Ground is supplied ? to BCM terminal 67 and ? to combination meter terminals 23, 25 and 28 ? through grounds F14, M57 and M61. LH Turn When the turn signal switch (combination switch) is moved to the L position, the BCM receives input requesting the left turn signals to flash. The BCM then supplies power ? to front turn signal lamp LH terminal 3 ? to rear turn signal lamp LH (part of the rear combination lamp LH) terminal 3. Ground is supplied ? to front turn signal lamp LH terminal 2 ? through grounds E15 and E24, and ? to rear turn signal lamp LH terminal 5 ? through grounds B7 and B19. The BCM sends a signal to combination meter across the CAN communication lines. This input is processed by the CPU (central processing unit) of the combination meter, which in turn supplies ground to the left turn signal indicator lamp. With power and ground supplied, the BCM controls the flashing of the LH turn signal lamps.
When the turn signal switch (combination switch) is moved to the R position, the BCM receives input requesting the right turn signals to flash. The BCM then supplies power ? to front turn signal lamp RH terminal 3 ? to rear turn signal lamp RH (part of the rear combination lamp RH) terminal 3. Ground is supplied ? to front turn signal lamp RH terminal 2 ? through grounds E15 and E24, and ? to rear turn signal lamp RH terminal 5 ? through grounds B7 and B19. The BCM sends a signal to combination meter across the CAN communication lines. This input is processed by the CPU of the combination meter, which in turn supplies ground to the right turn signal indicator lamp. With power and ground supplied, the BCM controls the flashing of the RH turn signal lamps. HAZARD LAMP OPERATION Power is supplied at all times ? through 50A fusible link (letter f , located in the fuse and fusible link box) ? to BCM terminal 70, and ? through 10A fuse [No. 19, located in the fuse block (J/B)] ? to combination meter terminal 21. Ground is supplied ? to hazard switch terminal 3 ? to BCM terminal 67 ? to combination meter terminals 23, 25 and 28 ? through grounds F14, M57 and M61. When the hazard switch is depressed, ground is supplied ? to BCM terminal 29 ? through hazard lamp switch terminal 2. The BCM then supplies power ? to front turn signal lamp LH terminal 3 ? to front turn signal lamp RH terminal 3 ? to rear turn signal lamp LH terminal 3 ? to rear turn signal lamp RH terminal 3. Ground is supplied ? to front turn signal lamp LH terminal 2 ? to front turn signal lamp RH terminal 2 ? through grounds E15 and E24, and ? to rear turn signal lamp LH terminal 5 ? to rear turn signal lamp RH terminal 5

You'll need to find a wiring diagram an component location chart to check this out . Here is a diagnostic flow chart for trouble shooting this problem ! Do you know how to use a voltmeter ?
DEFINITION: This table diagnoses inoperative turn signals on one side. It assumes that the cornering lamps, hazard lamps, and turn signals on the other side all operate properly.

1

Did you perform the Exterior Lights System Check?
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Go to Step 2 - yes
Go to Exterior Lights System Check - no

2

1. Disconnect the turn signal flasher connector.
2. Turn the ignition switch to the RUN position.
3. Place the turn signal switch in the appropriate position.
4. Connect a DMM from the appropriate turn signal flasher connector cavity to ground:

?€¢
LH: cavity C (ORN)

?€¢
RH: cavity B (BLK)

Is the voltage within the specified range?
10-15 V
Go to Step 3 yes
Go to Step 5 no

3

Connect a fused jumper between the appropriate turn signal flasher connector cavities:
?€¢
LH: cavity C (ORN) to cavity D (YEL)

?€¢
RH: cavity B (BLK) to cavity F (TAN)

Do the appropriate turn lamps light without flashing?
--
Go to Step 4 yes
Go to Step 6 no

4

Replace the turn signal flasher. Refer to Hazard and Turn Signal Flasher Replacement .
Is the repair complete?
--
Go to Exterior Lights System Check
--

5

Repair the open in the appropriate circuit:
?€¢
LH: CKT 57 (ORN) between S200 and the turn signal flasher

?€¢
RH: CKT 58 (BLK) between S201 and the turn signal flasher

Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Go to Exterior Lights System Check
--

6

Repair the open in the appropriate circuit between the turn signal flasher and the IP fuse block:
?€¢
LH: CKT 685 (YEL)

?€¢
RH: CKT 686 (TAN)

Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Go to Exterior Lights System Check

Hope this helps your out. I know the diagram and locator is a bit blurry but hopefully it gets what you need.
Drivers kick panel:
Front wiper 20A - Front wiper system Cigar 15A- Cigarette lighter Audio 10A- Audio, remote control mirror Air Bag 10A -Air bag diagnostics Stop lights- 15A -Rear brake light, high mounted stop light ECU B+ 10A - Shift lock actuator, transaxle controle module, radio, engine control module Room 10A - Interior light, clock, ignition key reminder, rear cargo area light switch ABS 10A- Anti lock brake system control unit ECU IG1 10A - Transaxle control module, shift lock actuator, ABS control unit, DRL unit Meter 10A - Instrument panel, back-up switch, electronics time control module, inhibit switch Turn signal 10A- Hazard switch ,front and rear turn lights, turn indicator IGN1 20A - Ignition switch ABS 30A- ABS pump motor TNS 30A- Tail light, license plate light COOL/FAN 30A- Cooling fan Cond/Fan 20A- A/C condenser fan Starter 15A- Start signal , Fuel pump Blower 25A- Blower Motor SR/ACC 10A - Ignition switch Hazard 15A - Hazard and turn signal light D/Lock 25A- Door locks ABS 30A - Anti lock brake system control P/W RH 20A- Power window motor right hand P/W LH 20A- Power window motor left hand IGN2 25A- Ignition Switch
Engine compartment :
Head 25A- headlights IG 2 30A- Ignition switch IG coil 15A -Ignition coil, condenser,generator IC regulator, diagnostic connector. O2 down 10A- Rear O2 sensor O2 up 10A- Front O2 sensor Fuel pump 10A -Fuel pump unit Injector 10A -Fuel injector ,camshaft positioning sensor, purge solenoid valve, EVAP, IAC actuator, Mass Airflow sensor, EGR stepper motor. fuel pump relay coil, vehicle speed sensor. A/Con 10A - A/C compressor controls, cooling fan BTN 30A- Brake light , high mounted stop light. Tail light LH 10A- License plate light, tail light , rear combo light, instrument panel illumination Tail light RH 10A-License plate light, tail light , rear combo light, instrument panel illumination Head low 15A- Headlight Head Hi 15A-Headlight Horn 15A- Horn

Inside kick panel

I know this post is old but in the interests of helping others ....


I installed the 7T4Z-15A416-B on a 2011 Ford Flex that has LED lights as standard.

I mounted the box on the LH side, inside the rear bumper. Since the box is outside the car, I gooped up the box with 'liquid tape' to seal the wire exits from the plastic casing.

The 4 color ribbon cable goes to the receiver area. I threaded mine through the hitch itself and used cable ties to limit vibration/abrasion.

I spliced the signal cables for LH turn indicator and tail/stop lights into the LH light wiring harness behind the rear lights.

The RH turn indicator has a longer wire which I threaded through the hitch and spliced it into the RH light cluster harness behind the RH light.

I connected the red +ve wire to the 12V feed to the 20A accessory socket in the rear cargo area. I put a small **** in a blanking grommet to bring the wire inside the vehicle.

The earth required drilling a hole into the body behind the LH light. i coated this also with 'liquid tape' for corrosion protection.

The Stop cable (which puzzled me for the longest time) went unused so covered it with insulating tape.

The harness works perfectly. The only caveat is the accessory outlet has to be powered up i.e. the ignition on.

could be fuses bulbs or loose wiring

You may have blown a fuse or two. Have you checked fuses?

RH Tail, Number plate = C7 RH box
LH Tail, Number plate = C7 LH box

RH Reverse, Rear Fog = B8 RH box
LH Reverse, Rear Fog = B8 LH box

burnt diodes on the back of the dash can give this fault also, have somebody check the electrical contacts...

If Same Light For RH Lamp Is Working Then It Could Be Problem with Bulb of Lh Tail Lamp Or Wire Got Disconnected, Check Main Socket For LH Tail Lamp, Some lose Connection Or Corrosion May Be There, Fuse Is Ok.

Reconnecting a 7 wire circuit.....I presume you have located the rear JUNCTION BOX, or HARNESS splice.... At the lights wiring.
1. YELLOW = LH Turn signal
2. RED= STOP Lights
3. WHITE= Ground
4. BLACK= LH Tail Light/# plate lamp
5. BLUE [If available] Auxiliary Power Supply
6. GREEN= RH Turn signal
7.BROWN=RH Tail Lights
Depending on style you may find that the LH and RH Tail lamp colours are the same.[ie] Both Brown or both Black.
Best of luck in your endevours.
Regards DT

If your signals & brakes are on 2 different circuits, ( for example a red lens for stop & an Amber for turn.) then you'll need to buy a converter that goes between vehicle & trailer. They're not too expensive at any trailer or RV place. I think some of the autoparts stores stock them now too.