Technical resources
Wiring diagrams, installation guides and reference material for Mad Folk parts and old Holdens. Free to use whether you bought from us or not.
Wiring diagrams
8 diagrams + wire table
Full colour diagrams for our main harnesses, showing every factory option. Pick the one that matches your alternator and wiper switch.
EJ EH Holden
For the Mad Folk EH Holden Premier main wiring harness. Click a diagram to open the full-size PDF.
EH diagram with all options. Alternator with external regulator.
EH diagram with all options. Alternator with built-in regulator.
Internal regulator + headlight relay
EH diagram with all options. Built-in regulator alternator, upgraded with headlight relay.
Every wire in the EH main harness: mark number, Mad Folk and OEM colour, source and what it does.
HD HR Holden
For the Mad Folk HD HR Holden Premier main wiring harness.
HR diagram with all options, 3 pin wiper switch and headlight relay upgrade.
HR diagram with all options, 5 pin wiper switch and headlight relay upgrade.
Installation guides
12 guides
Step-by-step fitting notes for Mad Folk parts. Where there's a printable version, use the PDF button.
Ignition
Old Holden ignition barrel install
How to remove and replace the lock cylinder in an old Holden ignition switch.
Wiring an electronic distributor and 12v coil in place of the factory resistive coil feed.
Ballast resistor for points ignition
Fitting a ballast resistor where the original resistive coil wire has been removed.
Harness & electrical
EJ EH body harness rear termination
Configuring the rear body harness termination for your boot and tail light setup.
Match any fuel sender and gauge in the 0–500 ohm range without modification.
VZ binnacle conversion for VY / Monaro
Notes on the converted oil gauge and wiring for the VZ binnacle in a VY or Monaro.
Wipers & washers
Installing the brand new replacement EJ EH 2 speed wiper switch.
Mounting and wiring the washer pump from the fuse panel supply.
Preslite washer pump diaphragm
Replacing the diaphragm in the EJ EH Premier Preslite washer pump.
Positioning and fitting the washer nozzle in the plenum front wall.
Throttle & pedals
Bolt-in and weld-in assembly and fitting steps for the EJ EH cable pedal.
Assembly and fitting steps for the HD HR cable accelerator pedal.
Connector identification
16 connectors
Not sure which plug you're holding? Match it by cavity count and shape, with photos and original GM part numbers.
Old Holden harness connectors
The common Delphi 56 and Delco connectors in EJ to LC looms. Each one has angled and front photos, the original GM part numbers and colours, and the Mad Folk replacement you can buy.
Can't find what you need? Tell us your model and what you're working on and we'll point you in the right direction.
Contact us