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A/C-Heater Control Panel

WARNING: This page is about a different car, the 1999 Dodge Pickup, 1999 Dodge Durango, 1999 Dodge Dakota, and 1999 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Connect a vacuum gauge in line with Black A/C-heater vacuum supply hose, located at tee near power brake booster (Dakota) or in engine compartment (Durango and Ram Pickup). Position gauge so it can be viewed from passenger compartment.
  2. Start engine. While observing gauge, rotate mode control knob to each mode position (one position at a time). Pause after each selection. Test gauge should drop, then return to 8 in. Hg shortly after each selection is made. If gauge reading is as specified, go to next step. If gauge reading is not as specified, check for vacuum leak in vacuum lines or A/C-heater control panel.
  3. Move temperature control knob quickly to full hot and full cold positions. A distinct sound of blend-air door hitting its stops should be heard. No spring-back of knob should exist.
  4. If temperature control knob operates as specified, temperature control system is okay. On Dakota and Durango, if temperature control knob does not operate as specified, check condition, routing, installation, and adjustment of temperature control cable. See TEMPERATURE CONTROL CABLE  under ADJUSTMENTS. Also check blend air door for proper installation, obstructions, or faulty seals.
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