Questions and Answers

Chevelle Turn Signals Q. I have a 1966 Chevelle, 350, powerglide trans, column shift auto. Edelbrock 4 brl, drum brakes.I'm having some electrical problems with the turn signals and brake lights.

PSF = passenger side front
DSF = driver side front
PSR = passenger side rear
DRS = driver side rear

ALL parking lights work (front and back). Only the PSR brake light comes on when the brake is depressed. The left turn signal works only for the DSF and the dash indicator light blinks normally. Right turn signal works only for the PSR, but I don't get ANY dash indicator light blinking.

The problem occurred after I replaced the turn signal switch and harness (a piece of the plastic holding the turn signal handle broke). I was making a left hand turn and when I straightened out the wheel, bringing the cam back into neutral, I've had this problem ever since.

Since then I have replaced the flasher and its harness and replaced all the bulbs front and back. I took the turn signal switch and harness back out, but there are no frayed wires or broken connections. Fuses all show good. I'm at a loss. What words of wisdom might you have?

Chad

A. I sure wish I had a wiring diagram for this car. It would make advising you so much easier. You can go to a public library and get a wiring diagram which will make the job easier. First off, make absolutely sure you have the right T/S switch. Second, check all the fuses with a test light or ohmmeter. Those glass fuse can look good but still be bad.

What you're going to have to do is break the system down into chunks, starting with the T/S switch and working back. At the T/S switch, turn the T/S on either left or right and see if you have a flashing signal coming out. (Dark green - left? Orange - right?) If you do, then the T/S switch is good. Note the color of the wires you get the flashing and the direction. This will be the same color wire throughout the system.

Next jump to the back and check for flashing power back there. If you have it then the sockets are no good and need to be replaced. If you don't, then you have a wiring problem between the switch and the bulbs. At this point you'll just have to trace down the harness.

I would really check out the switch first. If it worked fine before it broke and is crazy after the new one is put in, I'm willing to bet it's a problem with the switch.

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