Front Drivers Signal Light Not Working

[Nd4SpdSe]

I apparently lost my front drivers signal light. It's definitely not the bulb, and my relay for my side marker doesn't click either. Of course I tested with a multimeter, and nada, but the rear drivers side works. For testing, I replaced the flasher relay with the one I got waiting for my LED bulbs (but it does both), and I even swapped out my Smart Entrance Control Module (a spare that I blew the defrost circuit in) and nothing changed. I looked at the diagram, but physically on the truck I'm not sure where I need to look next. Anyone ever have anything similar?

 

[Prime]

So the right one works?

I would take the flasher circuit and apply some voltage to it and see if the bulb comes on. If it does, it tells you that the power isn't making it to the flasher. Which could mean a bad wire in the column or a bad switch in the stalk.

 

[Nd4SpdSe]

Both passenger side bulbs flash as normal, and it's only the rear that works on the drivers side. The flasher circuit just flashes, it doesn't have any split of front-rear directly controlled or part of the relay, and the column just directs the flasher to flash either the left or right side of the truck, so both those should be a-ok....But I like the idea of pushing just a 12v into that circuit to test it

 

[Prime]

Okay so the rear works fine. That eliminates the stalk and flasher. Sounds like a damaged wire to the front.

 

[metzican]

Just hold your hand out the window and point.

I agree with Prime, sounds like a wire issue. You can trace the wire and try to find the bad part. Or what I would do is just run a new one.

 

[Nd4SpdSe]

Ya, I was and am hoping it's not a wire issue. I know I could run a new one, but what I'm more curious and worried about it is why, and if other wires in that harness will have that happen to them as well. I just frustrates me cause the truck is ready to roll except for that, and I don't want to get in an accident because of it, Quebec drivers are pretty bad afterall, and the last few days if I had the time to work on her, it decides to Thunderstorm around 4pm for the rest of the evening. Not even kidding, it's done it like 4 times in the last 7 days and almost like clockwork....

 

[Nd4SpdSe]

Well I worked on this yesterday for what I could until I ran out of light. Ran 12v into the out (Green/Yellow) from the signal stalk and just got the rear light. Even tested from the connection under the drivers seat just for the fun with the same result. I powered the front light circuit directly from the wire and that came on, but of course, nothing out to the rear....pretty much as we suspected.

I tried to follow the harness from the stalk, but oddly it *seems* to run directly to the engine bay and doesn't really branch off anywhere else under the dash, but I'm just hoping it's me that didn't check right; it is jam packed under there in that corner, and it doesn't make sence for it to run into the engine bay, than from there to double-back to the back of the truck. I wish they had some sort of body electrical diagram for the lights, the FSM doesn't give me too much but diagrams for the lights...

 

[Muadeeb]

Rear tail lights from the stalk go through the massive connector at the passenger's feet, then through the body to a connector under the body at the rear.

 

[Nd4SpdSe]

Indeed, I've tested both from there and the stalk and the rear light works fine, it always did. It's to trace back the front, or more where the front and rear split.

 

[Muadeeb]

Either on the SMJ at the passenger's feet, or at the stalk would be my guess. It's essentially a straight run from the stalk to the lamps. Blue wire with a red stripe on it.

Wish I had a picture, or even knew which side of the SMJ we'd be looking at.

 

[Nd4SpdSe]

Actually it would be a Green-Yellow. I've pumped in 12v from the stalk and I get the rear light only. What do you mean SMJ form the passengers feet? There's the connectors under the drivers seat, it runs in there too, and I tested from that as well, but of course, the rear only came on. I pumped in 12v directly into the front circuit and it all works there, but I get nothing from the rear light or in the stalk.
I'm 99.9% sure the problem is in this part of the wiring harness, but I just need to find that part and see where the break is in there.

http://i.imgur.com/czpzCvy.gif

 

[Muadeeb]

DOH! Was looking at marker lights earlier, but the routing looks the same. The SMJ is the Super Multiple Junction, basically where a bunch of connections come together in a locking (as in bolted) connector.

Pull the panel in the passenger footwell, next to the door and under the glove box. Should be a pin and a 10mm bolt. I doubt I have a picture on my laptop, but I'll look.

 

[Nd4SpdSe]

Well I did the whole roung, and you're right, it runs into the connector on the passenger kick panel, than goes up that side, past the fuse box, than across the rad support, and to the drivers side headlight....all rather than following the harness inside on the driver side gromet, which I was following up until the point that you mentioned the kick panel Muadeeb. In the end it was a pinched wire that wasn't obvious from the outside, but the copper was broken on the inside. Definitely a learning experience, and I can properly fix it, rather than just running some wire for a quick fix.

Thanks for all the help!