Wire in the brain

VW bus owner: Back at it again with the 72 bus. The old hazard switch was melted. Replaced the hazard switch with new one.  All 4 lights flash. Headlights turn on,  but won't switch from low to high,  but I can hear the relay clicking when I use the switch on the column. Turn signals won't light up with the column switch, both in the dash indicators and outside at the bulb. But they light up with the hazard switch... I'm sure this isn't uncommon,  but can't seem to figure it out. Any help is appreciated!!! Thanks all!

Intelligent Tinkering: The advice for all troublesome VW electrical problems should be pretty much the same: When all else fails (or before, if your time is valuable to you), get a 12V test lamp and a good quality multimeter or Volt-Ohm-meter (VOM) and a couple long pieces of wire with alligator clips, and use a process of elimination. Always test the test lamp or VOM before you start and keep the device's battery fresh. If I can't figure out why a light won't come on, I start with the light, probing for power and ground, sistering to run tests, and so on, and work my way back to the fuses. If you have a couple 15 foot bits of wire with alligator clips on both ends, you can sister right back to the battery terminals to test lamps and horns and wotnot. The pointy end of a 12V test lamp is designed to be pushed through insulation to test for power or ground. Find a good known ground for the other end, or, if you're testing for a good ground, find a good known hot. Use the longer pieces if your test lamb wires son't reach. When you get done just roll each wire in your fingertips and the hole you made will close. The continuity setting on the VOM is your best friend for testing switches and relays. Isolate the switch or relay and actuate it, then test for continuity. You can connect the low amp side of a relay to a hot and a ground with the wires and alligator clips to actuate it, and test the high amp side for continuity with the VOM.