How many fuses and relays Gdoes the 1994 XJ6 Jaguar have for the heater?

You need a fuse and fuse box identification chart to start tracing the wiring and find the various heater components to test. There is a company that independent auto repair shops get their information from, this same information is available inexpensively for people that work on their own cars.. The information is year make and model specific, covering repair procedures, torque specifications, fluid capacities and specifications, service bulletins, component locations, wiring diagrams ect.... Alldata is very easy to navigate http://bit.ly/AllData_Repair_Manuals_Online