Q: Possible defective alternator

Hello, the refrigerant system needs checked for leaks. The belt attached to the compressor should be checked to make sure the compressor clutch engages even if only for second. If all that is good then a set of gauges need...

The sunroof could fail for either electrical, or mechanical reasons. The sunroof module takes inputs from the switch. It then uses this information to control the sunroof motor through a dedicated relay. A problem anywhere in this system could prevent...

The cause of these random problems can be due to the wiring harness is having loose connection issues to the modules and ECM of the vehicle that causes erratic issues then are hard to explain and even harder to find....

Hi there: To be completely honest, I've never known a Jaguar owner who hasn't had their car in for service at least three times during ownership. They are notorious for faulty electrical systems, fuel system issues and transmission problems. Unless...

Pull up on the parking brake to see if the brake feels loose like the cable has stuck on. Your brakes may have moisture in the brake fluid and it may have froze inside the brakes locking them on. You...

Hello, thank you for writing in. There are several different lights at the rear of the vehicle. They are run off of different circuits to control them separately and in order to keep them from all going out at once....

Oil pressure can be tested and verified against factory specifications using an external pressure gauge, connected to a threaded access port on the engine block. If pressure measures normal, and the engine otherwise functions normally (adequate and even cylinder compression,...

The high mileage oil brand, and the specific viscosity rating (5W-30), that your husband bought for you is perfectly acceptable and you needn't worry at all. High mileage oil simply claims to have "extra" engine oil seal conditioners and perhaps...

Hi Jeff. Thanks for contacting us today. An arching battery can cause a lot of different electrical problems. Sometimes, the shift solenoid can cause the shifting issues you're describing, while in other instances, it's a mechanical problem. I think the...