Electrical

Are the summer months in your truck spent with the old-school “2-60” air conditioning (two windows down at 60mph)? A properly operating HVAC system provides comfort and safety. The pages of many prior issues of the Turbo Diesel Register magazines have been devoted to the removal of the instrument panel to replace a leaky air conditioning evaporator core (‘98-‘02), leaking heater core, flimsy blend air doors (‘03-current), etc. And you'll find some of the A/C parts for the DIY-er at Geno's Garage.

Instead of covering “how to change a part,” let’s discuss the theory of the system’s operation and some real world technical tips not found in your factory service manual.