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LS 400/LS 430 Electrical Questions & Problems

47 messages,  Last post on Nov 23, 2009 at 4:04 PM

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What is this discussion about? Lexus LS 400, Lexus LS 430, Electrical, Sedan

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#17 of 47 Electrical issue by ahaith Apr 18, 2008 (2:25 pm)
A friens of mine has a 92 LS400... the start runs great, but the oil alternator, battery,and coolant lights come on when I start and stay on constantly! Other than those lights, the car seems to perform flawlessly. Is this an easy fix? Should I buy it?
#18 of 47 Re: Tranny slipping out of OD [movinonout] by vguthrie Apr 18, 2008 (6:56 pm)
Replying to: movinonout (Dec 05, 2007 6:09 pm) Just today I experienced the reverse light indicator and downshifting issue when the brakes were applied. I read the response to check the wire bundle and found a white wire completely cut. In the event I have to replace this bundle is there an official name for it? Also...I've been trying to figure out a surge issue I've been having on acceleration especially on a grade. Could this all be related to this cut wire in the trunk????
#19 of 47 Re: Lights all over the dash... [bluesind] by j7wild May 10, 2008 (5:02 pm)
Replying to: bluesind (Jan 11, 2008 8:18 pm) Hi JL,   did you ever find out the cause of your problem?   I am experiencing the same thing on my 1992 L S400 and I have a brand new battery, the oil is full, the radiator is full and the engine is not overheating, etc   It seems to come on when I'm going slow (under 30mph) or stopped but when I speed up, it goes off.   It drives fine too.
#20 of 47 STEREO? by damien15 Jun 09, 2008 (11:25 pm)
DOES ANYONE KNOW WHERE THE AMP FOR THE STEREO IS LOCATED ON 91 LS 400 THANKS. Replies to this message: wwest (Jun 10, 2008 9:19 am) darinh (Jul 09, 2008 12:13 pm)
#21 of 47 if you have that Lexus Brand multi-CD Changer in the trunk by j7wild Jun 10, 2008 (5:32 am)
like I did but it no longer works, it should be in the trunk after you remove the CD Changer:   http://www.carstereohelp.com/stereoremovalLexusLS400CDChgrR.htm   anyway I found the cause of my problem; the Alternator was going out; it's all fixed now.
#22 of 47 Re: STEREO? [damien15] by wwest Jun 10, 2008 (9:19 am)
Replying to: damien15 (Jun 09, 2008 11:25 pm) There is for certain an amp under the front passenger seat but I seem to remember another one, bass speaker driver(??), in the trunk.
#23 of 47 it's in the trunk by j7wild Jun 10, 2008 (5:50 pm)
yes it's in the trunk, you will need to pull the trunk carpeting off... did you see my link above?   http://www.carstereohelp.com/stereoremovalLexusLS400CDChgrR.htm
#24 of 47 Re: STEREO? [damien15] by darinh Jul 09, 2008 (12:13 pm)
Replying to: damien15 (Jun 09, 2008 11:25 pm) Hi Damien15,   Mine was located in the trunk, drivers side, just left of the gas tank. Of course I had already found the site " carstereohelp" and pulled my CD changer out before I realized that mine wasn't under there. Still a good site and will go there for info. again.
#25 of 47 Electrics chaos by rbb50 Sep 21, 2008 (7:40 am)
I Have a 1992 Lexus ls 400 with 270,000 Kilometers on it.. The engine occasionally shuts down if I use anything electric on it ... For example, If I touch the brake peddle, use the turn signal, open / close the window, the car will stall out and usually restart immediately. It doesn't happen al the time, just occasionally but I cannot find any common factor. Also, whether it is related or not, the gear shift lever will jam and the release button has to be hit hard to release it.. If the car shuts down, the lever must be jiggled to get the car to restart. Other than the electrics problems its a great little car and runs fine.. any suggestions ... thanks... Replies to this message: j7wild (Sep 21, 2008 8:14 am) vguthrie (Sep 21, 2008 8:16 am) j7wild (Sep 21, 2008 9:21 am)
#26 of 47 Re: Electrics chaos [rbb50] by j7wild Sep 21, 2008 (8:14 am)
Replying to: rbb50 (Sep 21, 2008 7:40 am) if you go back to my previous post #19 on page 2 , my problem was caused by the alternator starting to short out so I had it and the battery replaced.   Everything ran fine for about a month and then I started having a problem SIMILAR to yours and to #10 on page 2.   Same thing: car will jerk like it's downshifting when I apply the brakes and the Reverse indicator on the dash will come on and the whole instrument panel will fade out.   Also if I turn the headlights on and I'm going faster than 30mph, the speedometer will drop to 30mph and it won't go any faster and the engine rev meter will go up to 4 or 5 and it sounds like you are driving in neutral.   The first time this happened I was driving home from a friend's house at 3 am , 16 miles away, and I pretty much limped home at 25 mph max.   One more thing is the O/D indicator will flash saying it's off and then it disappear.   I took it back for repair and they replaced a cable in the taillight that was shorting out and it caused a brake light to go out.   After that, it's working fine now and I hope it stays that way.

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