T ran sfer Case 6,000 Miles GL-5 As required Check

A U X I L I A R Y HEATER

IN DEX

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General D escription.................................................................................... 1A-5 Component Replacement and R epairs................................................... 1A-6

Controls ..................................................................................................... 1A-5

GENERAL DESCRIPTION

An auxiliary heater is available as a dealer installed accessory to provide additional heating capacity for the rearm o st extrem ities of the panel and suburban models.

This unit operates entirely independent of the standard heater and is regulated through its own controls at the instrum ent panel.

This system consists of a separate core and fan unit mounted either under the second seat or at the left side of the vehicle (Fig. 9). Heater hoses extend from the unit to the front of the vehicle where they are connected to the standard heater hoses with “ tees” . An “ on-off” water valve is installed in the heater core inlet line in the engine compartment. This valve must be operated manually — “ on” for cold weather, “ off” in warm weather. The purpose of the valve is to cut off coolant flow to the auxiliary core during warm weather and eliminate the radiant heat that would result. CONTROLS

Two methods of control are employed with this system:

Water Valve (Fig. 10)

When heat is desired, the water valve m ust be in the “ on” position (valve located in the engine com partm ent in the core inlet line). During the sum m er months, this valve should be placed in the “ off” position.

Fan Switch (Fig. 11)

The two speed (HI-LOW) fan switch is located below the left side of the instrum ent cluster. Pulling the switch knob out half-way places the fan on “ HI” ; at the full out position, the fan is on “ LOW” .

Fig. 9 —A u x iliary Heater Installations