G
Guest
Guest
I use fog lights on several of my old Fords for turn signals. You need two 3 amp or larger diodes for both lights. Wrap the wires of two diodes together in parellel so that they let voltage to the light. This will let the voltage flow from either source of supply to the bulb but block it from going back to the other supply. Connect that end of the diodes to the fog light. The two wires out the back of the diodes, one is connected to left or right wire from the turn signal switch and the other to the fog light switch. This way you have both fog lights and turn signals. There are two types of turn signal switchs. One has I believe 7 wires. Thats the one you need. I had this on my 39 for 20 years with no relays. G.M.