Q. I have a 2005 Chrysler PT Cruiser Convertible and found a blown fuel pump fuse and ASD (Auto Shutdown Relay) fuse. Could the ASD relay be the problem? I also noticed that when trying to start the car, the red security light on the dash stays on and does not go out. I checked for trouble codes with my code reader but found none. Any thoughts?

A. While relays can fail, a blown fuse usually points to an electrical problem rather than a bad relay. Unless the ASD relay is damaged or corroded, I would be more suspicious of a wiring short or a failed component in one of the circuits it powers. The ASD relay supplies power to the fuel injectors, ignition system, and other engine controls. A failed crankshaft position sensor can also cause a no-start condition, although it typically will not blow a fuse. The illuminated security light is another clue. A fault in the anti-theft system can prevent the PCM from keeping the ASD relay energized, but it would not normally cause the ASD or fuel pump fuses to blow. Since both fuses are blown, I would start by looking for wiring damage, a shorted fuel pump, or another failed component before replacing parts. In my experience, blown fuses are often a sign of a deeper electrical problem that needs to be found first.

Q. I have a 2020 BMW 330xi that was recently at BMW for a starter recall. Upon completion of the recall, the technician sent me a video showing one of my engine mounts starting to leak. I’ve owned three previous BMWs and many other vehicles and never had a problem with an engine mount. The car........

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