The Electrical System

The Jensen Hemiceptor is completely rewired using modern connectors and components. The vehicle wiring system is based on  a Ron Francis Express kit which includes 16 fuses and 18-20 circuits , and was installed by Butch’s Fabrication.  Wiring of the dash gauges was facilitated by a Ron Francis VDO wiring kit.

The electrical system should be thought of as two systems. The first of these is the “vehicle management” system which includes charging, lighting, gauges, and environmental components. The fuse and relay box for these components is located on the drivers side footwell, in the engine compartment.

The Vehicle Management fusebox, with cover removed

The second system could be called “propulsion management” and the wiring for this system was furnished by FAST (XFI and XIM units) and Russel Drake (PCS trans controller). The components in this system include engine management, transmission management, and ignition control. These components communicate with each other via a “CAN” network and are fused separately. These fuses are located in a box mounted on the passenger footwell, in the engine compartment.

This is the Propulsion Management fuse box

Battery and cabling

The Optima battery is located in a compartment in the hatchback, behind the rear seat, and is secured in a CNC machined battery tray specifically for Optima batteries.  It is connected via an AllStar cable kit.  

Optima battery

Alternator

The alternator is a new, single-wire, internally regulated GM Delco unit that was included in the March serpentine belt accessory system.  Even though the unit was new, I was suspicious of quality, so I took the unit to Jeff Lawler at Larco Automotive Electric in Kalispell, MT for inspection.  Turns out it was Chinese made and had some deficiencies.  It has now been remanufactured by Jeff, including premium American bearings and components, and hand-assembled by an artisan.

Starter

The starter is a Chrysler gear-reduction unit completely remanufactured by Jeff Lawler at Larco Automotive Electric.  Jeff does not just rebuild, he completely  re-manufactures and upgrades the units he produces.

Master kill switch

There is a master kill switch located in the console.  This switch “kills” the entire electrical system with the exception of retaining computer and radio memory so tuning settings are not lost.

A blue light on the console indicates that the master kill switch is powered up.

The Master Kill switch

The red button at the rear of the console is the Master Kill Switch.

Inertia kill switch

There is a Ron Francis Crash Relay Switch installed, located next to the battery in the battery box compartment in the trunk.  The function of this switch is to shut down fuel delivery and ignition functions in the event of a significant impact or collision.  This switch is reset by depressing the red button on the switch.