I've been fixing some stuff on my 73 Duster, one of the things not working was the pass side rear turn signal. Anyway, starting from the rear i tested the wiring all was good i pulled the connector block apart, tested for continuity, even ran a jumper wire from the dash side green wire and had the turn sigal working. Then i pulled the steering wheel off and checked for continuity on all the wires on the switch itself. Everone sounded out except for the brown wire which feeds the faulty one. The strange thing is, i inspected the wire from one end to the other and i cant see any damage whatsoever ?
Mick

idk if on your car, but some models have a connector at the bottom of the steering column at about the back of dash. I've seen an interruption there several times.

Remove and reaplace your bulb socket a few times and try to twist it to make a good connection at your housing. Sounds like a bad ground.

SRT
I've had my meter on both ends, one end is the connector you're talking about and the other end is the turn signal switch.
70hemi GTX
Nothing personal but i've tested the wiring right up to the switch and it's the wiring in the column.
I've swapped the bulbs side for side changed the one on that side, sprayed wd40 into the holders check the ground wires and cleaned them, also added an extra ground to the dash frame.
If i swap to the green wire on the connector under the dash, which feeds the other turn signal it works.
How can it be a bad ground ?

Grounds are funny. You think they are good and then all of a sudden they are not as good as the were before.

Also check your switch handle. Can you move it perpendicular to the normal way the switch moves? If you can, try to tighten the screw that holds the lever in the switch. You switch may not be making contact with-in itself. Sounds goofy, but I had one do this for me.

It's a bear until you find it. Then it is something really simple and you just shake your head at it.

I changed the screw on the lever because the thread had gone. If the wire on that side shows no continuity, how can it be a ground problem. I've tested every single wire in that connector to the wiper switch and the only one that doesn't sound is the brown wire that feeds that turn signal.
Mick

I am assuming you are not showing continuity through the switch, correct? Try moving the lever while you have the ohm meter hooked up to the wires for the passenger's side to see if you can get continuity through it somewhere.

I had the same problem in my Dart. I hunted and hunted. Changed out switches and put a longer screw in the lever and that fixed it.

Like I said lots of hunting until you find the problem! And sometimes it doesn't make sense.

If you are getting power into the switch (obvious by other stuff working) but not getting power out of the switch then I sounds like the switch to me. Testing the wire at the switch eliminates the rest of the wiring back to the bulb and the ground, if no power then it's in the switch (again, provided you are getting power into the switch), if power then the troubles are down the line. I have seen what X is talking about with both the ground issue and with the "normal"switch activation position not making contact and other areas in the sweep making contact. The switch being loose (the 2 halfs not tightly connected through the swing or corrosion on the contacts inside the switch either one can cause a single side issue, it could also be that one of the contacts inside the switch has jsut fallen off. We are talking about ancient switches on most of these things, pull the steering wheel and do some looking, poking and pushing, you'll find it.

I've fitted a longer screw in the switch. I'm testing for breaks in the wire not ohms, tester on each end, i cant see how moving the switch would make any difference.
Mick

mopar346
I worked from back to front and the only section that isn't working is the switch to the first connector. When i originally stripped it to do the wobbly turn signal arm, i took the screw out and a small washer fell out from what looked like the rear of the turn signal switch, which i didn't put back in.
Mick

When you do get to it- put some white grease inside the switch- near the contacts to prevent the contacts wearing each other out!!!

Just to conclude, i fitted a new switch and it all works ok now, it was tight getting the plug through the column but it went through.
Mick