Electrical Section

 Brake Lights/Tail Lights

  Wiring of  2-prong brake light switches ('68/'69)  with 3rd switch for warning light.

 Wiring of  3-prong brake light switches  ('70 and later) with warning light connection.
       Shows how the warning light circuit works.

  Wiring of  3-prong brake light switches  ('70 and later).  Another view showing the actual plug/socket wiring to switches.

 Internal circuit details of later brake system dash warning lights.

 Tail light wiring:    '68 thru '72   Beetle  showing wire colors.

 Tail light wiring:    '73 thru '79   Beetle  showing wire colors.

Headlights

  Wiring of the headlight sockets.

  Headlight Dimmer Relay circuit  '66 thru '70.

  Photo of Headlight switch, showing wiring.

  Headlight Dimmer Relay circuit  '71 thru '79.

   Photo of Headlight switch, showing wiring.

Turn Signal Flashers and Hazards

 VW used a number of different schemes over the years on both Beetles and Busses.  This article explores some of the more common aspects of the circuits.  Detailed diagrams along with descriptions are included for each case.

Quick Links to all of the diagrams (no text):

Turn Signal Simplified Diagram, 3-Term Flasher	'62 - '65 Bus Hazard Relay
Turn Signal Simplified Diagram, 4-Term Flasher	'68 - '71 Bus 6-Wire Turn Signal (Simplified)
3-Wire Turn Signal  with Hazard Switch	How To Add Separate Stop Lights to '66 - '71 Bus
Early 6-Wire Turn Signal	Internal Electronics Circuitry of 3-Terminal Flasher
'68 - '71 Bus 6-Wire Turn Signal with Hazard Switch	Internal Electronics Circuitry of 4-Terminal Flasher

Fuel Injection

  Schematic of Fuel Injection system, '75 -'79  Type I and Type II.

  Description of Fuel Injection circuit, '75 -'79  Type I and Type II.

Windshield Wipers

  Wiring of 12 Volt, 2-speed wiper (Steering column-mounted switch).

 Description of circuit for 12 Volt, 2-speed wiper  (Steering Column-mounted switch).

  Wiring of 12 Volt, 2-speed wiper (dash-mounted switch).

 Description of circuit for 12 Volt, 2-speed wiper  (dash-mounted switch).

  Wiring diagram for 6V Single-speed wiper.

Alternators/Generators

 How do I test my Generator ?  

  Generator to Regulator wiring.

 6V  To 12V  Conversion - Check List

 Wiring diagram for Type I cars with alternator.

  Wiring details for Type I alternator with external regulator (Motorola).

  Description of Alternator operation.

   Internal wiring of Motorola Alternator w/ external regulator.

  Wiring for conversion from  Generator to Alternator.

   Adding a dash warning light to a Buggy with Alternator.

   How to test for excessive "drain" on the battery.

Miscellaneous

  How to Test/Troubleshoot  "No Spark"  condition.

 What is this plug in my engine bay?

  Using  a  3-wire  turn signal switch  with  single-bulb  tail lights .

  How to wire the carb (choke and solenoid) to the coil.

  Audible warning circuit for Oil pressure, Generator, Lights left on.

  Audible warning circuit for Oil pressure, Generator.

  Starter /seatbelt interlock wiring  on '74  Type I  (How to bypass it.)

  Wiring of backup lights.

  Where is the Backup Light switch located?

  Wiring of plug for Turn Signal switch  ('72 Up)

  Wiring of plug for Ignition switch  ('72 Up)

  Safety circuit for adding an electric fuel pump.

  Another scheme for adding an electric fuel pump. This one "primes" the pump during cranking, eliminating need for a push button.

  Circuit that  simulates Term #57 on the Type II  Headlight switch.

  9-Terminal Flasher explained.  This is a Link to the page written by
       Matt Roberds.    Use your browser BACK button to return here.

  Circuit diagram for rear window defogger on Type 1 cars.

  Where to jumper on the starter solenoid to test starter.

  An easy way to test the starter under the rear seat of Type 1 cars (12 Volt).

   How to add a dip-stick temperature probe and be able to tell what the dash warning light means.

   How to add a tachometer without running new wires to the engine bay.  (Same page as above.)