I recently purchased a well maintained 1993 Lexus LS 400, but the battery was said to be a problem. I have only driven it a few times, but I notice when I apply the breaks the headlaps blink. Can this be a symptom of an electrical problem that would explain why the battery was always being drained for the prior owner? I am going to purchase a new high quality battery, but the prior owner told me to keep the + terminal disconnected so it would not go dead. Hmmm :( This does not sound like a practical way to address the problem. Any suggestions? Scott


Asked by Aug 05, 2014 at 07:23 PM about the 1993 Lexus LS 400 Base

Question type: Maintenance & Repair

!993 Lexus LS 400 w/ 130K miles, well maintained at local garage. I am trying to see if their is a more fundamental electrical problem that I should be aware of with this make of car. Thank you. Scott

4 Answers

Tom Demyan

Thats the way the original owner told you there is a parasitic drain on the battery. So it's basically an electrical issue that is draining your battery when the car is off. Check out this site.....https://www.youtube.com/watch?v=KF1gijj03_0

2 out of 2 people think this is helpful.
Tom Demyan

Since the headlight flash when putting on the brakes, it very well could be part of those circuits that are affected. I would start there.

1 out of 1 people think this is helpful.

easiest way is to use a dvm set for dc current draw should be approx .03 ma. if it is higher remove fuses on suspected circuits one at a time while watching meter. hope this helps

1 out of 1 people think this is helpful.

ah that suggestion was re parasitic draw

Your Answer

Add photo

Related Questions

  • Alarm goes off when I disconnect the battery! 6 answers

    I went on vacation for 6 weeks and when I returned the battery was drained. I charged it and everything was fine. I am leaving again on a long vacation and thought I would disconnect the battery to av...

    2000 Volkswagen Passat GLS


    Maintenance & Repair

  • Problems with 2015 Jeep Cherokee Trail Hawk transmission and electrical systems 359 answers

    2015 Jeep Cherokee Trailhawk 4WD


    Maintenance & Repair

  • New Grand Marquis owner with power-steering question 7 answers

    First of all, hey there. My name is Rob and I just bought a beautiful 1997 Grand Marquis GS and am absolutely loving it! My Sunfire of 10 years was rear-ended and wrote off a couple of weeks ago, and ...

    1997 Mercury Grand Marquis 4 Dr GS Sedan


    Maintenance & Repair

  • 4x4 Transfer case 234 answers

    Good afternoon all. About two weeks ago my Durango's 4x4 started to engage without being switched and with no indication on the instrumentation panel. The problem is that this is happening on the high...

    2005 Dodge Durango Limited 4WD


    Maintenance & Repair

LS 400

Looking for a Used LS 400 in your area?

CarGurus has 282 nationwide LS 400 listings starting at $2,995.


Search Lexus LS 400 Questions

Lexus LS 400 Experts

#1 Tom Demyan
Tom Demyan
Reputation 370
#2 FordNut
Reputation 340
#3 dandyoun
Reputation 210
View All

Related Models For Sale

Used Lexus GS 300"
27 Great Deals out of 1,003 listings starting at $3,200
Used Lexus ES 300"
16 Great Deals out of 1,178 listings starting at $1,500
Used Lexus SC 400"
88 listings
Used Mercedes-Benz S-Class"
188 Great Deals out of 6,677 listings starting at $2,900
Used Honda Accord"
1,383 Great Deals out of 78,758 listings starting at $1,395
Used Toyota Camry"
1,731 Great Deals out of 99,035 listings starting at $895

Used Cars For Sale

1999 Lexus LS 400 Base For Sale
3 Great Deals out of 35 listings starting at $2,995