Attached is a description for adding fear foglights to E34s that don't have the wires per installed from the factory. This method bypasses the LKM in the electronic box under the hood, but gives you the rear foglamp indicator on the dash.

Procedure

This method gives you fuse protected rear foglights with the factory dash indicator without going thru the light control module in the electronics box under the hood.

• Euro fog light switch p# 61 318-351-238 BMA or Pacific BMW
• 2 bulb sockets (same as backup bulb socket, dealer)
• 1 generic fog light relay with wiring harness (usually 30amp 12v. it's overkill, but they are cheap and available)
• 15' 24 gauge Teflon insulated wire.
• 15' 18 gauge wire
• 1 1.2w dash indicator lamp with socket (Wagner makes one for BMW comes 2 for $2.99).
• 2 inline fuses (1-2amp and 1 5 amp)

You must solder the switched + for the foglight switch to the rear foglamp indicator bulb contact on the bulb itself. Use a meter to see which side of the circuit board on back of instrument panel is grounded, wire goes to opposite side on bulb (if it's wrong 2a fuse will blow)
Rear foglight socket must be cut out and cleaned up with xacto knife and or small file so that backup light socket will fit in. Follow the pattern you see on the plastic plug. The contacts for the bulbs can be made from old speednuts or other material that you can solder wires to, look at the other conectors for pattern.