RAM 1500 Van V8-5.2L CNG VIN T (1999)
resistance should be from 8.5 to 11.5 K Ohms. If OK, go to Step 15. If not OK, replace the faulty heater-A/C control unit.
15. Move the temperature control knob to the full counterclockwise (Cool) position. Measure the resistance between the ignition feed circuit terminal
and the blend door feedback signal circuit terminal in the blend-air controller receptacle on the back of the heater-A/C control, The resistance
should not be more than 100 ohms. If OK, go to Step 16. If not OK, replace the faulty heater-A/C control unit.
16. Move the temperature control knob to the full clockwise (Warm) position. Measure the resistance between the ignition feed circuit terminal and
the blend door feedback signal circuit terminal in the blend-air controller receptacle on the back of the heater-A/C control. The resistance should
be less than 10 ohms. If OK, repair the blend door feedback signal circuit to the blend-air door motor as required. If not OK, replace the faulty
heater-A/C control unit.
