No Left Blinker when Braking

[RamJetFSJ]

OK, need a little help w/ a electrical gremlin...
Left blinker works fine, unless I push on the brake, then it stays solid. Same thing w/ the Hazards.
Right blinker works fine all the time.
Parking lights on/off do not affect anything.

It happens even w/ the left tail light blub removed, so unless the housing itself has a short (or the wiring leading to it), Im not sure where else to look.

Possibly the in column turn signal switch? Any other ideas? How to troubleshoot?

Thanks guys!

[RamJetFSJ]

The left turn signal does NOT stay solid when the brakes are applies WHEN the Brake/Haz Fuse is removed.

Also, the Trailer harness was completely disconnected when I bought the Jeep, so its not an issue in there.

[RamJetFSJ]

I replace the T/S Flasher and swapped all the bulbs in the car left to right, with no change. Does anyone know where the left turn signal grounds to?

[Cataldo]

Humm. Had a similar problem with my wifs yj and it was the bulb/socket.

[KJ Ryu]

Did you check the front side-marker bulb? Everytime I've had issues with blinkers, it always winds up being a loose connection or burnt bulb in the side-marker.

[RamJetFSJ]

I swapped all the bulbs side to side. (both front/side and back bulbs). Also ran a ground directly to the rear brake socket. Ill mess around a bit more w/ the housings and see if I can figure it out.

[Tatsadasayago]

Weirdness like this makes me think T/S switch is the culprit.

[RamJetFSJ]

I hate electrical gremlins. It could have been like this since I bought it, but I dont know, since I never thought to step on the brakes while testing signals and such, and on the one long road trip I did in it, I had no brake light anyways due to a blown fuse...

I unplugged the front turn signal socket and tested again, with no difference. Im going to do the same w/ the rear and do a quick check of all the sockets w/ a multimeter, and if I dont find anything weird, I guess Ill order up a turn signal switch.

[Tatsadasayago]

Smart move.
In my long experience, most electrical gremlins have been due to poor grounds. The others from seemingly irrelevant sources such as headlight dimmer, headlight switch and turn signal switch.
Hell, I even had a series of unexplained dash and lighting issues caused by a corroded door switch...

[Tatsadasayago]

BTW: Serehill is the resident FSJ Electrical Genius on this network.

[GaJeep94YJ]

Lol I love threads like this! It makes me realize my Cherokee is normal!

Btw my horn hooks every time I turn my right blinker on! I just tell the Weiss and kids that the jeep is just extra safe. It's making sure no one is in my blind spot for wide right turns!

Sent from my Nexus 5 using Tapatalk

[ClovisMan]

So, question. Do you lights dim when any of the blinkers blink? Will it make your stereo cut out? If you have these issues, try changing out the ignition switch. That dude causes a lot of those problems.

[RamJetFSJ]

The volt meter does bounce a little when the blinker is on... Does that count? I have the headlights on a relay, so they wouldn't be affected. Any other lights I should be looking at? running lights maybe?

[RamJetFSJ]

I also noticed the blinkers blink a lot slower when the headlights are on, if that points to anything.

I redid the battery to ground wire, but that didnt change anything.

[RamJetFSJ]

I swapped the turn front turn signal wiring/housings left to right w/ no change. But noticed the DSPO had cut and re-soldered the two positive wires on both... not sure why.

[RamJetFSJ]

Note my Volt Gauge is an aftermarket Autometer one. Not stock (obviously).

In testing the brake light sockets, on the BAD side, I get 1.5 Ohms when going from the ground to each positive terminal in the socket.
On the GOOD side, I get 1.5 on one, and 3.0 on the other. Does this look like a sign of a short or bad bulb housing to you guys?

[RamJetFSJ]

SOLVED So while testing a new turn signal switch OUT of the column and finding it working fine, i also found a wire spliced into the turn signal switch harness , and decided to snip it since I needed to snip it to splice it into the new harness instead, and that fixed the turn signal problem. Not sure where that wire leads, or why it was there, so time will tell what OTHER electrical item I killed, but atleast my turn signals work correctly now.

[RamJetFSJ]

Well. I think that fixed it, but soon after that I realized all of a sudden the blinkers would not work w/ the headlights on. And the dash lights were coming on w/ the brake lights! Turns out there WAS a bad bulb. Dont think that was causing my original problem, I must have broke the bulb while taking it out over and over trying to fix by problems (glass was loose in the bulb). But a pair of new bulbs, and the jeep is officially on the road fully legally and safely for the first time since I bought it some 12+ years ago! Good feeling! Took the family to the beach in it yesterday. Few things here and there to take care of, but its daily driver ready now at least.

[KJ Ryu]

Nice! But, sounds like you're going to need a dimmer switch soon, to me.

[FSJunkie]

I've had this happen when the 4-way emergency flasher knob was pushed in halfway, but not enough to actually flash. Did all kinds of weird stuff. Make sure that knob is pulled all the way out.