I just installed the 7 pin factory trailer harness but i have no right turn or trailer markers . 2005 nissan frontier

hope this helps

6 pin socket

6 pin plug

7 pin socket

7 pin plug

5 pin socket

5 pin plug

7 pin socket

7 pin plug

7 pin socket

7 pin plug

7 pin socket

7 pin plug

12 pin socket

12 pin plug

small 6 pin round plug & socket

1 tail, clearance - brown

2 left hand turn - yellow

3 right hand turn - green

4 stop - red

5 electric brakes - blue

6 earth - white

small 7 pin round plug & socket

1 left hand turn - yellow

2 reverse - black

3 earth - white

4 right hand turn - green

5 electric brakes - blue

6 stop - red

7 tail, clearance, side markers - brown

round socket

large 5 pin round plug & socket

2 left hand turn - yellow

3 earth - white

5 right hand turn - green

6 stop - red

7 tail, clearance, side markers - brown

large 7 pin round plug & socket

1 left hand turn - yellow

2 reverse - black

3 earth - white

4 right hand turn - green

5 electric brakes - blue

6 stop - red

7 tail, clearance, side markers - brown

7 pin round heavy duty plug & socket

1 earth - white

2 left hand rear , clearance and marker - black

3 left hand turn - yellow

4 stop - red

5 right hand turn - green

6 right hand rear , clearance and marker - brown

7 reverse/auxilary - blue

7 pin flat plug & socket

1 left hand turn - yellow

2 reverse - black

3 earth - white

4 right hand turn - green

5 electric brakes - blue

6 stop - red

7 tail, clearance, side markers - brown

flat socket

12 pin flat plug & socket

1 left hand turn - yellow

2 reverse - black

3 earth - white

4 right hand turn - green

5 electric brakes - blue

6 stop - red

7 tail, clearance, side markers - brown

8 battery supply - orange

9 auxiliaries - pink

10 earth - white

11 rear fog lamp - grey

12 auxiliaries - violet

there are fuses for all lights in your truck. those fuses sre located in the IPDM box, whiich is the box by the battery. there is a black cover about 6inches by 7inches. under that lid is the IPDM where you need to look and fine the fuse that is blown. start there. if the fuse is blown, replace it and recheck your rear plug for power at appropriate pins. if you have power everywhere at the connector and then you plug your trailer to it and the same fuse blows again, then i would be looking at the trailer harness for short causing the fuse to blow.

the fuse is inside of the IPDM the white box on r/h side of truck by the battery. there is a black cover that you have to remove to see the white IPDM box. the IPDM has fuses and relays. the tail lamp fuse is the 10amp fuse las one in the row of fuses. its by it self with no fuses next to it. check the IPDM cover on the inside. its marked.

I actually know the solution. I just went through it. It's a very long story, and I cannot tell you how mad I am at the Nissan Dealership in Grand Junction, Colorado, for not knowing the answer to this question right away. It has cost me over $500 and 500 miles of driving to learn the location of this tiny fuse holder. Look straight up above the brake pedal and accelerator pedal (under the dashboard) and see a wiring harness that plugs into the "Body control module" above the steering column. You should see two mini fuse holders sticking out of this harness. They are whitish in color, like a gallon milk bottle. One is for the right trailer turn signal, and one is for the left.
This is the only year Nissan Frontier where this is true (as far as I know) it is the result of a recall on that year where they installed this harness. If your truck went in for the recall, then you will have the same harness located in the same place. Good luck, Bob Walker, Moab, Utah

Check max fuses under the hood

if you go to the parts store they make them ready to plug in you will have to just unplug the tail lights and plug the wire harness inplace of it then itll plug back into the original spot.

any autoparts store should be able to tell you how to hook it up

on the r/h side floor area by your right foot if you are sitting in the truck is a side cover. thas where the harnesses are for the hitch. they are hidden behind the cover. you should see a small harness with relays. thats the harness.

First check the fuses. There may be one for trailer running lights. Check also power at the harness. If the brake lights and turn signals are seperate, there has to be a converter from 5 to 4 wire. For the power to feed back to the brake lights it sounds like the vehicle wiring is direct and not using a converter... or one of the bulbs on the trailer is contacting both contacts. Try http://www.etrailer.com/faq-wiring.aspx and maybe get a simple 4 pin tester that plugs into the 4 pin connecter. Hope this helps.

If the lights are working on your vehicle, then no. With a test light, check to see if you're getting power on the plug coming from the vehicle. You should if all the lights are working on your truck. I'd check the ground wire to the plug on the trailer harness... probably loose or disconnected, especially if everything quit all of a sudden.