ACK!
Saw that email and figured I would reply on here.
I'll try scanning a full color wiring diagram for a 1970 VW beetle for you that might 'splain all this stuff a bit better, but I'm assuming, from your description, that you are running real VW components, so that is what I will be describing, here:
There are three major components to this system: The directional lever switch, the flasher relay and the emergency flasher switch. Here is what I traced on each:
Directional Lever/headlight dimmer:
(contact number = wire color to next contact number)
54/BL = green/black to 49a on flasher relay
S = Brn/Wht to dimmer ground
15 = Blk to ignition switched 12V
31 = Brown to Ground
SU = White to Ignition Key Warning Buzzer (this may be coming from the ignition switch)
30 = Red to constant +12V
50 = Red/Grn to Starter Solenoid
R = Blk/Grn to "R" on flasher relay
L = Blk/Wht to "L" on flasher relay
Flasher Relay
49a = Green to 49a on flasher switch
= Grn/Blk to BL on Directional Lever
(Two wires to one contact tab)
+ = White to "+" on flasher switch
KBL = Green/Red to gauge flasher (directional) bulb
31 = Brown to ground
Flasher Switch
15 = Black to ignition 12V
49a = Green to 49a on flasher relay
= Blk/Green to 49a on directional switch
+ = White to "+" on flasher relay
30 = Red to constant +12V
31 = Brn to Ground
R = Blk/Grn to front/rear right directional lights
L = Blk/Wht to front/rear left directional lights
I'll try to scan the wiring diagram and legend tomorrow and mail it to you.
Hope this doesn't confuse the issue, cause it only works on genuine VW flasher components. The theory is that the flasher just pulses +12V regardless of which direction is selected and that the directional lever selects the correct side and sends that signal to the flasher switch, which passively passes it on to the correct side lights. When the emergency flasher switch is pulled out it turns on the flasher and, since it owns BOTH sides of the directionals it simply shorts them all together to make them all flash at once. If you have emergency flashers but no directionals then I would look for a missing input (BLK/GRN - BLK/WHT) coming from the directional lever switch to the flasher switch (contacts R and L) or a missing trigger signal from the directional lever to the flasher switch (54 to 49a)
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