This goes back to my front passenger turn signal not working. The dash indicator light turns on and goes solid when the right turn switch is activated as well as when the headlights are turned on. The front turn signal bulb will not illuminate under any circumstances, but the rear bulb lights up under when it is supposed to, but it never blinks during the turn signal.

I tried cleaning out the terminals with no success so I am back to a wiring issue. I chased the wires from the bulb through the wire harness, to just below the A/C blower resistor, and found a weird looking splice. The black and yellow wire is spliced with a solid black wire coming from the same direction (IE: from the bulb) and it also splices with two other black wires coming from underneath the injectors.

1st pic is of the bulb wires
2nd pic shows where I found the splice
3rd pic shows the splice
4th pic shows where the other two black lines are coming from

Could someone please go out and look at their truck to see if theirs is the same as mine?

I would really appreciate it
Zac

 

Sounds like you've lost the ground to that light socket. The black wire is the ground wire so if you trace it back you should find it grounded on or near the inner fender on the passenger side.

 

I'm assuming you tried replacing the bulb already right? A bad bulb can cause the blinking issue.

 

Yeah the bulb is brand new. I will check on the ground inside the fender right now and report back.

 

I checked the ground and it is good!


I don't understand why the black/yellow wire is spliced in with the other grounding wires. I couldn't find another black/yellow wire to splice it into, or any other wires that were cut in that same area of the wire harness.

Should I cut the black wire coming out of the bulb and try a different grounding point?

 

Ok I just stripped a little insulation off of the ground wire that come directly out of the bulb housing, and ran a wire all the way back to the battery for the best ground possible. The damn thing still will not light up. I reinspected the bulb to make sure it was good and it is fine.

What the hell is going on?

 

Sounds like you test out the ground good. Now test the power to the light bulb socket. Do the same thing, strip it back and hook up to a temp power source.

 

Im wondering if its something as stupid and simple as a bad light socket? Is there power to the other side of the socket? If so I would say the socket, if not, then a brake in a wire or connection somewhere?

Basically what crazy is getting at...

 

Ok now we are getting somewhere...I put a multi-meter on the bulb terminal wires to see what was going on and here is what I found.
Green/brown wire to ground gets 12v
Black/yellow wire to ground gets .22v

So now my problem lies somewhere before the bulb terminal. and I am still wondering is the splice I pictured in the first post is the reason for such little juice at the bulb. If the black/yellow wire is being fed with power, and it is spliced with those three ground wires, then the power would be going straight to ground, and never getting to the bulb. But if that is the case why isn't it tripping any breakers?

Zac

 

You need to be looking at a wiring diagram. We have some in the FAQ in this section.