# 2001 Lexus RX 300 - looking for a juice leak **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** rx300, lexus\ **Created:** [April 13, 2020, 12:59pm UTC](https://community.cartalk.com/t/2001-lexus-rx-300-looking-for-a-juice-leak/162794 "2020-04-13T12:59:50Z")\ **Posts on this page:** 7\ **Page:** 1
**Author:** ![Drake47](https://avatars.discourse-cdn.com/v4/letter/d/e8c25b/32.png) [@Drake47](https://community.cartalk.com/u/Drake47)\ **Post date:** [April 13, 2020, 12:59pm UTC](https://community.cartalk.com/t/2001-lexus-rx-300-looking-for-a-juice-leak/162794/1 "2020-04-13T12:59:50Z")
I had a new battery installed last year and an alternator maybe 6 years ago. If my car sits 4 days I have to jump start it. My mechanic cannot find anything wrong. It seems to me that it’s “leaking” juice somewhere. What should they be doing to find it? ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [April 13, 2020, 2:44pm UTC](https://community.cartalk.com/t/2001-lexus-rx-300-looking-for-a-juice-leak/162794/2 "2020-04-13T14:44:57Z")
A parasitic draw test will likely find the problem. Your mechanic does not know how to do this so find a better one. Expect to pay for his time no matter if he repairs it or not. Suspect aftermarket radios, subs, remote starters or alarms as the culprit. ---
**Author:** ![VDCdriver](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/vdcdriver/32/30_2.png) [@VDCdriver](https://community.cartalk.com/u/VDCdriver)\ **Post date:** [April 13, 2020, 2:46pm UTC](https://community.cartalk.com/t/2001-lexus-rx-300-looking-for-a-juice-leak/162794/3 "2020-04-13T14:46:37Z")
> [@Mustangman](#): > > A parasitic draw test will likely find the problem. **Your mechanic does not know how to do this** so find a better one +1 Just like with any other profession, some will be more skilled than others. Clearly, the OP needs a more-skilled mechanic. 🤔 ---
**Author:** ![texases](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/texases/32/862_2.png) [@texases](https://community.cartalk.com/u/texases)\ **Post date:** [April 13, 2020, 4:09pm UTC](https://community.cartalk.com/t/2001-lexus-rx-300-looking-for-a-juice-leak/162794/4 "2020-04-13T16:09:48Z")
How many miles? Is the problem solved for a while by charging the battery? ---
**Author:** ![ok4450](https://avatars.discourse-cdn.com/v4/letter/o/e9bcb4/32.png) [@ok4450](https://community.cartalk.com/u/ok4450)\ **Post date:** [April 14, 2020, 4:57pm UTC](https://community.cartalk.com/t/2001-lexus-rx-300-looking-for-a-juice-leak/162794/5 "2020-04-14T16:57:13Z")
Has he actually performed a parasitic draw test or is this one of those eyeball and pray things? The test is easy as far as finding the problem circuit. Finding the problem in that particular circuit can be a bit more challenging and IMO when it gets to that point a factory wiring schematic is a must have. ---
**Author:** ![Honda-Blackbird](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/honda-blackbird/32/3159_2.png) [@Honda-Blackbird](https://community.cartalk.com/u/Honda-Blackbird)\ **Post date:** [April 14, 2020, 5:10pm UTC](https://community.cartalk.com/t/2001-lexus-rx-300-looking-for-a-juice-leak/162794/6 "2020-04-14T17:10:12Z")
The quick and dirty parasitic draw test i always use is to charge the battery with a charger And then disconnect the hot lead to the alternator… secure the end of the hot lead… because well… its hot… Wait a day or so and see if she starts up w no problems… if so… the alternator is the culprit. You could go about this a different way by leaving everything hooked up and monitoring voltage drop … then disconnect it amd monitor more… the first way is easiest and requires less babysitting ---
**Author:** ![Cougar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cougar/32/21348_2.png) [@Cougar](https://community.cartalk.com/u/Cougar)\ **Post date:** [April 14, 2020, 8:30pm UTC](https://community.cartalk.com/t/2001-lexus-rx-300-looking-for-a-juice-leak/162794/7 "2020-04-14T20:30:24Z")
Normal current draw on the battery should be less than 50 milliamps when the car is parked and systems are in the ‘sleep mode’.