Alright, I got a 72 240z and my front turn signals work, but my rear turn signals both turn on like hazards if I turn left or right. The reason being, I'm thinking, is because my brake lights went out so I just got some wire from the brake switch and hooked it up to the tail lights, because I had hot wire at the switch, but not at the lights. So any help with this wiring would be great. I'm going to go back out there and see what I can do. I have a fix it ticket for this and I need it fixed within a week. It's my daily driver. Thanks.

1. Rip out your jury-rigged fix for your brake lights. (Okay, remove the wires carefully.)

2. Check the bulbs you have in the sockets. Are they dual filament bulbs? If you put single filament bulbs in the sockets, it will cross the left and right turn signal circuits through the bulbs. That would cause both turn signals to flash at the same time.

3. Download the FSM. Look at the wiring diagram in section BE. That wiring diagram will allow you to trace the wires from your brake switch.

You'll find two wires, both green with a yellow stripe. One comes straight from the fusebox to energize the circuit. The other runs from the brake switch to the brake lights. Remove the bulbs from the brake lights. Measure voltage both sides of the switch (to ground) with the brake pedal depressed. You should get 12VDC on both wires.

1. 12VDC on one side - Bad switch

2. 0VDC both sides - check the fuse and check that the wires are plugged in firmly.

If you get 12VDC on both sides, check for voltage at the taillights. If you are losing the voltage between the downstream side of the brake switch and the taillight, the chances are that you have a bad or broken connection. Also make sure the bulb sockets aren't corroded.

Tell us what you find out.