Wiring Harnesses, XJ6 and XJS

Doing the engine wiring for a Jaguar has always been a problem- even though we are switching to a more common Chevy powerplant, and portion of the original Jaguar engine wiring is usually required to do finish the job. The problem here is that most of the original Jaguar underhood wiring was of relatively poor quality, and after years of being closely exposed to heat and environment on the engine, it is far too brittle and unreliable to be reused for the conversion. Luckily Jaguar made it simple to tap into the basic underhood engine wiring by putting a key connector on the right side of the engine compartment. This allows us to unplug the original engine wiring (that was been cooked into oblivion on the engine) and discard it, and replace it with a new purpose-built  harness from Jaguar Specialties that plugs right back in. The Jaguar Specialties harness (called the basic engine function harness) plugs right back into the car, is made of top quality 90º C wire (very high temperature) and is fully color coded for each engine function. The harness comes with the mating Jaguar plug to the car side as mentioned above, but has 60" of loose wire lead to the engine side, allowing the end user to route each wire as he sees fit to the correct engine component and sensor, and then add the terminal he chooses to that end. This harness makes wiring a conversion much easier and more convenient, and for basic installations using a carburetor, this is all the wiring that is required. For fuel injected conversions, the new basic harness  can easily be routed inside the new fuel injection wiring harness (that comes with the new fuel injected engine) and also simplifies things greatly. Two different basic harnesses are available as follows:

74-87 XJ6, XJ12, XJ6C, and XJ12C with these functions:

• Alternator Field Wire

• Ignition +12V lead (to ignition system or distributor)

• Tachometer Feed

• Oil Pressure Gauge

• Oil Idiot Light

• Water Temperature Gauge

• AC Clutch Control

or

76-91 XJS coupe, XJSC, and XJS convertible with these functions:

• Ignition +12V lead (to ignition system or distributor)

• Tachometer Feed

• Oil Pressure Gauge

• Oil Idiot Light

• Water Temperature Gauge

• AC Clutch Control

• Transmission Downshift Power (to be used if needed)

As mentioned above, the key to these harnesses is the Jaguar-style plug at the end. It plugs right into the car making the basic conversion wiring simple. Here's a picture of that plug (this one is for an XJS; the XJ6 version is similar)

Please see the "V8 Conversion Price List" page for current pricing on these various components