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Roadster-18 Wiring Kit




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Wiring Kit Installation Instructions



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  • Model: RDSTER-18



Kit Cars
Muscle Cars
Pro-Touring Cars


Similar to our Coupe-23, the Roadster-18 is a high quality yet compact kit designed especially for open air cars that don't have air conditioning, power windows, power door locks, 4 beam headlight systems, or a lot of electrical accessories. The heart of our kit is the Roadster Power Center, distributing power through 10 relays and 11 fuses to 18 circuits. This means more power to your system for easier starting, brighter headlights, and many years of trouble-free operation.


Relays offer an efficient and reliable means of switching high currents with minimal power loss. Auto manufacturers and professional car builders recognize this and have been using relays instead of bulky switches to improve the quality and reliability of automotive electrical systems for decades. The Power Center utilizes high quality relays to distribute power to various vehicle loads. This means no more time-consuming mounting and wiring add-on relays. The heavy duty ignition and headlight switches required by other manufacturers are not necessary with this kit. Even daytime running lights are provided as a standard safety feature!

Image of Power Center included with each Wiring Kit

The Roadster Power Center ... Key features:


•  Modern, high quality, and efficient design raises the bar for after-market universal wiring systems.


•  18 fuse-protected circuits


•  11 fuses


•  10 board-mounted relays


•  Daytime Running Lights - standard!


•  A separate output for conventional (switched) headlights if you don't want daytime running lights.


•  Use your own Ignition, Headlight, and Dimmer switches - a wide variety of switches can be used with this kit


•  Pushbutton Start ready! No extra relays required, no complicated wiring necessary.


•  This kit is limited to 2 headlights, if you have 4 headlights you will need the the Coupe-23 kit.


•  Car builders and designers!! - large heavy duty high-amperage Ignition, Headlight, and Dimmer switches are not required. Small, easy-to-mount switches can be used just as easily to control the Power Center's on-board relays for all high current circuits.


•  Dedicated 40 amp relay with thermostatic control input, compatible with all known electric radiator fans on the market, up to 30 amps continuous running current and 70 amps startup (inrush) current.



•  Alternator Exciter circuit, compatible with GM "SI" series alternators


•  20 amp Accessory circuit for a Radio, Power Point, etc.


•  Power Feed and Loads are connected to the Power Center through heavy duty stud terminals for simple, bullet-proof connections


•  Rated for 100 amps continuous total load, about twice what most street rods require


•  Most cars will not require any additional relays


•  Reverse battery protected


•  Compact size: 6-1/4" x 5" x 2 1/2" (LxWxH) makes mounting easy


•  Mounting base and cover are powder-coated satin black.


Image of 17x22 Full Color Wiring Diagram included with each Wire Kit


Circuits available through the Power Center:


•  Ignition / Coil


•  Fuel Pump / EFI System


•  Alternator Exciter


•  Gauges


•  Electric Choke


•  Heater Fan, High Speed


•  Heater System


•  Headlamps (60/55W max)


•  Accessory (20 amp)


•  Radiator Fan (up to 30 amps continuous)


•  Turn Signals


•  Brakes


•  Hazard Flashers


•  Parking Lamps


•  Starter Solenoid


•  Horn


•  Clock / Dome lights


•  Battery Power to Switches



The Complete Roadster Kit ... what’s included:


•  100A Power Center, 18 circuits, 11 fuses, 10 relays


•  Over 550 feet of GXL wire, labeled and color coded


•  Two 100A LMI fuses and fuse holders, one protects the Power Center, the other protects the Battery and Alternator




•  Large 17x22, Double-Sided, Laminated, Color Wiring Diagram


•  Steering Column connector kit


•  Radiator Fan connector kit


•  Headlamp connector kit


•  GM "SI" Alternator kit, also compatible with 1-wire alternators


•  Instrument Panel Gauge connector kit


•  Wire ties, 8" and 4", and heatshrink tubing

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