Hey guys, so my tail lights for my 350z 2003 are not working. All other lights (headlights, brake lights, blinkers) all work but the parking tail lights are not working. I have checked the fuse in the hidden box and it is good. Has anyone experienced any problems like this before? Thank you for all your help!

 

are they oem? i hear horror stories about aftermarket tails.

 

By hidden box, I'm assuming you're referring to the fuse box behind the battery. I think I blew that fuse once, but my front parking lights also went out. If your front parking lights don't work either, re-check the fuse.

This is probably a dumb question, but did you check the rear bulbs to confirm they're not toast?

 

Hey there, thank you for the help. They are OEM tail lights. I was wondering if the headlights and taillights are related at all or if they are completely separate from each other?

 

Hey there, thank you for the help. They are OEM tail lights. I was wondering if the headlights and taillights are related at all or if they are completely separate from each other? Yes the bulbs are still working because the brake lights are good.

 

Hmmmm, let me try this again.

There are 2 bulbs in your tail light.
1. One bulb illuminates when your parking/head lights are switched on (rear side marker bulb, 168).
2. The other bulb is dual filament and will illuminate when the parking/head lights are switched on and then it will light up brighter when you apply the brakes (7443)

Which light is not working?

 

Hmmm this is a bit ODDD the headlight switch goes to the BCM computer.. the front & rear lights are driven by the same BCM output pins ( which is an active HIGH ) . Couple of possibilities... BUT you didn't state if is is a coupe or vert....AND is the problem with the STOP LIGHT or running lights ? I will ASSUME running lights?
1 ) Was the car ever rear ended ( check wiring harnesses ).
2) Does the HAZARD lights work when you press that switch ?
3) Have you pulled AND tested the bulbs with an OHM METER?
4) Have you visually inspected the sockets?
5) With a volt meter have you verified GND & power ( running ) & POWER ( stop )
6) do you have the CORRECT bulbs in there?

As far as the RUNNING lights the fronts & rears are on the same feed point BUT you do have a bunch of wiring & connectors getting from the front to the back...

After market amps, sub, ?

Mike

 

Thank you for your response Mike

1. No never rear ended
2. Yes hazards do work and so do brake lights
3. Have not pulled the bulbs because since the brake lights and hazards are working I assumed the bulbs were fine.
4. Which socket do you mean? The one for the bulbs?
5. I have not tested grounds and powers yet. I think this will be my next step.
6. Same bulbs that were working a couple days ago.

I had this problem before and the problem ended up just being a fuse. But all the fuses in the hidden box next to the battery are all good. The 10A tail lamp fuse lights up when I use a fuse checker.

I will test the grounds and power running to the light for my next step. Is there any reason it may still be a fuse even though it is lighting up?

 

4 yes

Now that is interesting If the fronts work and the rears do not it's not a fuse, 1 line powers both ( FSM LT-189 ~192 )
If the stop light works they share the same ground ( BLACK ) .
There are 2 Red/Blue ( R/L ) L is blue in Japan, go figure one is STOP the other is running AND the other SINGLE bulb is the side marker ( same circuit ) .
LT-205 shows the tail light mechanical and the CONNECTOR goes into the lamp socket..
Is the socket for the stop/running bulb heat baked??
Does the license plate light work??
Did any of the lighting get swapped for LED's?

 

NEVER ASSUME ! LOL
Mike

 

The ONLY other place is E-106 to B2 ( front to rear harness connection )
PG-59 Shows B2 ( D/S kick panel by BCM )
PG-53 Shows E106

So you might want to Check the R/L going thru on pin 11..
It MIGHT BE open here !! but there would have to be ALOT of junk in that connector !

 

UPDATE: Hey guys! So I was going over which lights work and which don't and it turns out that the headlights do not work and neither do the tail light parking lights. All other lights work except the tail lights and head lights. VIGMAN, the fuses for both head and tail lights turn on when being checked, should I then assume that the problem is the ground or is there another relay that may be the cause? How should I go about this. Thank you again for the help guys!

 

I assume you have Xenon lights…. Do both HIGH BEAM & Low not function?

I assume you can read a schematic? and you have the FSM ?
LT-11 is the start
. Note the switch on the column is a input device to the BCM computer no ACTUAL power to directly run the lights comes from there… it is just a SIGNAL to let the BCM do the actual work.

Verify from the battery the fuse 'F" is good ( moulded in the batt terminal ) and 18 ( 10 A BATT ) 1 ( 10 A ON or START ) and 6 ( 10 A ACC or ON ) are all good ( this is BCM power ) This fuse panel is by the drivers side kick panel.

NEXT
LT-12 fuse 71 (BATT ) & 78 ( BATT ) on the " intelligent " power distro module behind the battery.

Next
Get an friend to operate...turn headlights on & flip between Hi & LOW beams, Do you hear the 2 relays CLICK this relay AND fuses are on the " intelligent " power distro module behind the battery. If YES verify fuses 72-74 HIGH BEAM 76 -78 Low beam Xenon these fuses will go HOT when you have the proper function selected ( e.g. brights fuses will be hot when brights are selected )

Your tail light issue AND head light are 2 separate issues.

Is the socket for the stop/running bulb heat baked??
Does the license plate light work??
Did any of the lighting get swapped for LED's?

 

This ASSUMES all your Batt NEG to ground ( chassis ) and grounds to CHASSIS are GOLDEN….. I do not THINK that is your issue since you live in AZ was this ALWAYS a west coast ish car ?

 

can we get an update on the issue i am having the same problem in an 05

 

It was the fuse! I had not checked them properly. Rookie mistake. Used an ammeter instead of my eyes to catch the right one. Thank you for all your help back then guys!

 

Hey fellas,
Its my turn to have this problem. I have LED city lights and they've been great. So I picked up LED tails (link below). Everything worked fine before I popped them in so here's the problem. CIty Lights up front only light up when i hit the breaks the small tail elements don't turn on at all. The large tail elements only work when i hit the brakes. I visually inspected every fuse in all three boxes. Nothing's out.
After much thought, my hypothesis is that the large elements which are high low are crossing the circuits. Causing this weird *** symptom. Any input you guys can give me is appreciated.

https://youtu.be/wWe7sZ2eqbE

 

Hello, I’m having a similar issue where the running lights in the brake lights don’t work (only work when you press the brakes). The headlight low beams and blinkers work but not the high beams and leds. Which fuses ended up being your issue? Thank you

 

 

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