LINK HARNESS AND FUSES
The link harness interconnects the PTC heater system components and connects the system to the main harness. The harness is routed from the RH side of the heater assembly, through the engine bulkhead into the plenum, then along the plenum and into the rear right corner of the engine compartment. Grommets protect the link harness where it passes through the engine bulkhead and the front wall of the plenum.
An 80 A in-line fuse is incorporated into the link harness to protect the power feed from the battery to the power relay. Three 30 A fuses, in a fuse holder at the side of the E-box, protect the individual power feeds from the power relay to the PTC heater.
Air flow through the heater assembly is directed to the outlets selected by the distribution control knob. The temperature of the air from all except the face level vents depends on the setting of the temperature control knob. Hot air is available from the face level vents only when the temperature control knob is at the maximum heat setting. As the temperature control knob is turned towards cold, the temperature of the air from the face level vents rapidly decreases to ambient (non A/C vehicles) or evaporator outlet temperature (A/C vehicles). The forward speed of the vehicle and the setting of the blower control knob determines the volume of air flowing through the system.