When the switchpasses thru AC, it blows the fuse, thus vehicle will not start, and no cold air also before fuse blows.
Q&AAsk Your Question
1999 Dodge Ram Wagon 2500
Question: Why is the AC/start fuse blowing
Answer #1Superbob March 15, 2011, 11:02Master
First thing I'd check is for a shorted A/C compressor clutch. Find the wiring to the compressor, unplug the connector to the A/C clutch, and see if it fixes it. You may want to find an auto electric specialist or a Dodge/Chrysler specialist.
If you want to find a specialist, here's a directory link for you:
Answer #2Johnny Mopar March 17, 2011, 13:48Master
Fuse #2 (10amp) in the Junction Block powers the Coil side of the A/C Clutch relay. Fuse #5 (20amp) in the Power distribution Center (PDC) under the hood powers the contact side of the A/C Clutch relay AND the contact side of the Starter Motor Relay. Superbob is correct in making sure your A/C Compressor Clutch coil is not shorted or drawing excessive current.