david@doan.us – 5/20/14

Bugeye Wiring

The original wiring on an unmodified car was marginal with a generator and only 2 fuses. The lights are problematic due to the ground connections that are strung together with bullet connectors. Then add an electric fuel pump and higher power lights and it gets more fun.

The main upgrades I have planned are relays for the high current devices and convert to alternator charging. I broke the system into 6 main circuits that are each fused:

1. Headlights2. Brake lights3. Horn4. Accessories

• Parking Lights• Flashers• Gauge Lights• Wipers• Heater• Tach• Fuel Gauge

5. Ignition/Fuel pump6. Power Port

The following page shows a state table that defines what should be powered for each combination of the key switch and light switch. Each state is controlled by relays.

david@doan.us – 5/20/14

DIAL KEY STATE

O – S - H ON - OFF

O 0 OFF

O 1 OFF

S 0 S

S 1 S1

H 0 H

H 1 H1

Key Switch State Table

STATE Definition

OFF Horn + AUX + Brake Lights

S OFF + ACC + Parking Lights + Flashers + Gauge Lights

S1 S + Ignition + Fuel Pump

H S + Headlights

H1 H + Ignition + Fuel Pump

States Defined

•S

•I

•B

•H

Ignition Switch

B = BatteryS = Parking LightsH = HeadlightsI = Ignition

BATT +

Functional Wiring

HORN

BRAKE LIGHTS

12V AUX

PARKING LIGHTSFLASHERSGAUGE LIGHTSWIPERSHEATERFUEL GAGETACH

IGNITIONFUEL PUMP

HEADLIGHTS (LOW)

S

I

H HEADLIGHTS (HIGH)

david@doan.us – 5/20/14

HORN

STOP LAMP SWITCH

IGN COIL DISTRIBUTOR

IGN/LT SWITCH

B

HS I

WIPERMOTOR

WIPERSWITCH

HORN BUTTON

FUEL PUMP

STARTERSTARTER SWITCH

HIGH

LOW

HORN

I

H

BRAKE

S

+

-

ALTERNATOR

1B 2

DIP SWITCH

FLASHERSWITCH

FLASHERRELAY

ACC

FUEL

BT L

SPEEDO

IGNL

TACH

HI

TB L

OIL/WATER

L

TANK

FLASHERLAMP

DASHLAMP

50Ω

Wiring Diagram