Answers

• tony78 08/23/09 6:40 pm PST

  Edit Answer (for another 8 minutes) 1. install a battery disconnect switch in the engine compartment next to the battery. napa auto parts sells one for under $ 20.00 2. look for battery drain. a. disconnect battery, check battery voltage after 1 day, if voltage is 2-3 volts less than full charge, battery is faulty. b. checking for a drain ( parasitic leak ) involves disconnecting circuit by circuit to locate problem area. c. one thing i have noticed is that a very large percentage of jaguar xk8 in your model year suffer from this malady,,apparently the electrics are not as reliable or as high quality as american, german, or japanese cars. (0)(0) Report It

• 49markvman 04/09/12 2:12 pm PST

  Edit Answer (for another -20 minute) Three days is a bit less than normal. But the battery drain on any modern XJ or XK is considerably higher than one would expect - mostly due to the security features and computers that remain activated after locking the cars. Although connecting a battery disconnect will preserve the battery, it also deactivates the security features. I have several XJs/XKs that sit for weeks or sometimes months without use and this has been a constant issue. If you lock the car using the key instead of the remote it reduces the battery drain (but also deactivates a portion of the security systems. I purchased a 10 watt solar charger (about $50), installed it on the right side of the rear parcel shelf on my XJs, and wired it directly to the battery. I have had no problems since then even when it has been cloudy. Good luck. (0)(0) Report It