Noe indicators Hi, my indicators have stopped working and so have my hazards too, this all happened after the green trailer light came on and stayed on, i have replaced the relay but im not sure which wires went to which terminal as there is only 3 wires connected but there was 4 spades on the terminals.

If the blinkers on the car are working when the trailer is not connected but they fail when you connect the trailer plug, it is because the LOAD of the bulbs on the trailer exceed the capacity of the BLINKER CIRCUIT of the vehicle. I would recommend replacing the tail lights on the trailer with LED tail lights. Did that on my travel trailer, and it solved the problem 100%

Not without knowing the year, make, model. Electrical is different in every vehicle

Lighting control module ? ?????? Hazard / flasher module ! Now ( there''s not even an electrical signal where the fuse plugs into the interior fuse panel.) What FUSE ??????

Stop Lamps
The STOP LP 25 A fuse in the underhood fuse block supplies battery positive voltage to the normally open stop lamp switch. When the driver presses the brake pedal, the switch contacts close and battery positive voltage is supplied to both the STOP 15 A fuse and the CHMSL 10 A fuse in the I/P fuse block, and to the turn signal/hazard module. The turn signal/hazard module then supplies voltage to both of the trailer rear turn/stop lamp supply voltage circuits. The voltage from the CHMSL 10 A fuse is to the center high mounted stop lamp (CHMSL) and the trailer jumper harness. The voltage from the STOP 15 A fuse is to the stop lamps, throttle actuator control (TAC) module, and the cruise control.
Backup Lamps
The backup lamp request signal is sent from the powertrain control module (PCM) to the body control module (BCM) on the Class 2 message system. This signal is based on the park neutral position (PNP) switch signal. The BCM supplies voltage on the backup lamp supply voltage circuit to the backup lamps and to the automatic day/night mirror. Voltage for the courtesy lamp supply voltage circuit and backup lamp supply voltage circuit is from the TBC B fuse in the instrument panel fuse block directly through the BCM to these circuits. A short to ground on either of these circuits will open the fuse. The backup lamps are grounded at G401.
For trailer wiring, a separate backup lamp circuit is connected through the underhood fuse block from the TRLR B/U 10 A fuse to the trailer wiring harness.
Turn Signal/Hazard Lamps
The IGN E 10 A fuse in the underhood fuse block supplies battery positive voltage to the turn signal/hazard switch assembly. The FLASH 25 A fuse in the 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 A 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 DDM/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.

Do you know how to do automotive electrical circuit testing with a test light or volt meter ? How to read an use a wiring diagram to pin point testing points . ( connectors , fuse locations etc... ) How to use a power flow chart ? Here is a site for just such info .

http://www.bbbind.com/free_tsb.html Enter vehicle info . year , make , model an engine size . System click lighting , subsystem exterior lighting . Second diagram shows trailer wiring .
Electric Testing Techniques You Need to Know

Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia

CHEVROLET 2007 SILVERADO TRAILER LIGHT TROUBLESHOOTING

Usually a ground problem - - the lights that are on are grounding thru the cluster.

Yes, I replaced the relay box and it worked.

The indicators have a few components in their system, being: The indicator switch The Flasher Unit/Relay The fuse & wiring The bulbs The Hazard light switch.
If the hazard switch is broken or disconnected it will stop the indicators from working, so you could check that. You can check the indicator fuse, which should be labeled on the fuse cover. If it is blown, there is likely a fault that has caused it to blow, more often than not a problem with the trailer hitch or a trailer that has been towed. The next culprit is the flasher unit. They are usually found in the fuse area, it is a black box, looks much like a relay, but slightly taller. If this is faulty it will cause the indicators to either stay on without flashing, or not work at all. You can check this by disconnecting it, and connecting a test light to the terminals, one at a time while working the indicator stalk (key on) If the light lights up then this confirms the switch is okay, and the flasher is likely faulty.

Which indicators? You mean the turn signals? If so it's your hazard relay - built into the hazard light switch. Get a new one at the dealer or from www.ecstuning.com, change it out, and you should be good to go.

Possibly blew out the hazard flasher unit. Check the flasher unit (usually there are 2, one for directionals and one for flashers).

Check the hazard switch and the connector to hazard switch see if u have the power and earth to hazard switch if there is power and earth to switch then replace ur hazard switch its faulty but if there is no power and earth to switch then it has whirring problem

fuses under hood

POWER DISTRIBUTION BOX Location Name Amp Circuits Protected A Trailer Tow 50 Fuse 32/Fuse 26/Electric Brake B Fan (Hi) 60 Cooling Fan (CCRM) C Start 60 Starter Solenoid/Fuse 30/Fuse 36/Fuse 2 D Ignition 60 Fuse 6/Fuse 12/
Fuse 8/Fuse 18/Fuse 14/
Fuse 24/Fuse 20/Fuse 21/Fuse 27/Fuse 33 E Rear
Blower/
RAS 60 Rear Heater Blower Motor
Rear Air Suspension F Seat 60 Power Seats G — — Not Used H Fan-Lo 40 Engine Cooling Fans J Power Accessory 60 Fuse 13/Fuse 25/
Fuse 1/Fuse 31/Fuse 37/
Fuse 40/Fuse 7/Fuse 19 K Light 60 Headlamps/Fuse 10/
Fuse 11/Fuse 3/Fuse 9/
Fuse 23/Fuse 29/Fuse 35/Fuse 41/Fuse 17 L ABS 60 ABS Control/Pump Motor Module M Heated
Backlight 60 Heated Backlite/Fuse 16/Fuse 28/Fuse 22 N Fuel 20 PCM/Fuel Pump/CCRM P — — Not Used R PCM 15 PCM Memory S PCM 30 AX4S/Cylinder Identification Sensor/EDIS Module/PCM Power/EGR Control/HEGO's/IAC/
Injectors/MAFS/VMV T Alt./Reg. 15 Generator U Air Bag 10 Air Bag (Dedicated) V Trans. Light 10 Transmission Indicator Light W Fan 10 PCM Fan Monitor X Diode — Hood Lamp Diode Y Relay — RH Trailer Turn/Stop/Hazard Lamps Z Relay — Powertrain Control Module AA Relay — Windshield Wiper Speed BB Relay — LH Trailer Turn/Stop/Hazard Lamps CC Relay — Windshield Washer Pump Motor DD Relay — Windshield Wiper Dynamic Brake/Run
The fuses are color-coded by amp rating.

Fuse Value Amps Color Code 4 Pink 5 Tan 7.5 Brown 10 Red 15 Light Blue 20 Yellow 25 Natural 30 Light Green 40 Orange 50 Red 60 Blue