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LS 400/LS 430 Electrical Questions & Problems

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

You are in the Lexus LS 400/LS 430 Forum. Your Hosts are pat & karens

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

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#1 of 47 LS 400 issues by lsbrasil Oct 09, 2006 (2:46 pm)
I have a 91 LS 400....running great, but I have a small issue I need answers to. When I apply the brakes the reverse light indicator on the dash lights up. Also, the car automatically downshifts as soon as the brakes are applied. I think it is electrical posibly to do with anti-lock brakes. Brake lights and reverse lights operate perfectly but, just wanted to see if anyone knows how to fix this problem Replies to this message: wwest (Oct 10, 2006 7:48 am)
#2 of 47 Re: LS 400 issues [lsbrasil] by wwest Oct 10, 2006 (7:48 am)
Replying to: lsbrasil (Oct 09, 2006 2:46 pm) Sounds as if some previous owner has modified the shifter electrical circuits to cause an automatic downshift upon braking. Probably not a hard thing to do/undo and not altogether unreasonable.
#3 of 47 Starting Problem by cneuman Oct 31, 2006 (11:59 am)
With this new set up, I'm not sure where to post this. But here goes. I have a 2002 LS that sometimes will not start. So far it's always been in the morning, after sitting all night in the garage. Sometimes after it sits for a half an hour or so after the first try, it will start up on it's on. It has started right away with a jump on two occasions. It's not the battery. That was the first idea I was given, so I bought a new battery. Does anyone have any idea what the cause might be?   Thanks for any help given.   cn Replies to this message: pat (Nov 06, 2006 6:11 am) brichwall (Jan 18, 2007 9:16 am) pat (Jan 18, 2007 9:27 am)
#4 of 47 Re: Starting Problem [cneuman] by pat HOST Nov 06, 2006 (6:11 am)
Replying to: cneuman (Oct 31, 2006 11:59 am) Let's continue here: Lexus LS 400/LS 430 - Startup Questions.
#5 of 47 Re: Starting Problem [cneuman] by brichwall Jan 18, 2007 (9:16 am)
Replying to: cneuman (Oct 31, 2006 11:59 am) CN,   What was the outcome to this issue. I am having the same problem. Please let me know as soon as possible.   Thanks!   Brich Replies to this message: pat (Jan 18, 2007 9:27 am)
#6 of 47 Re: Starting Problem [brichwall] by pat HOST Jan 18, 2007 (9:27 am)
Replying to: brichwall (Jan 18, 2007 9:16 am) Hi - welcome! Check the Lexus LS 400/LS 430 - Startup Questions. If you don't see anything helpful, post your problem there. Explain what's happening in your post. Good luck.
#7 of 47 Lexus LS 400 - Fuse Problem Cigarette Lighter. by seanc1 Jan 18, 2007 (1:38 pm)
Recently tried to charge a cell phone via the cigarette lighter in my 1994 Lexus LS400. Result - blown fuse - lost all heating/ventilation. Replacing the fuse does not solve the problem - tried it. Any ideas??
#8 of 47 severe issue help! by dsteiner Mar 23, 2007 (6:05 pm)
1991 400 LS--6 weeks ago the traction light came on and the dash lights would flicker. Then the car jerked slighly when driving. then there was an odor like a electical fire. Then the car would not stop running when the key was turned off. We have replaced he starter, fuel injectors ( the cylinders on one bank were ful of gas) and he brain box. The porblem still exits where the dash lites flick off and the car wont shut off. hte lex dealer cant find the issue and my mechnic commited suicide trying to find this issue. SAVE ME! -signed $1500 later and no peace
#9 of 47 Fuse box problem by rouge69 Sep 13, 2007 (4:05 pm)
I'm trying to locate all the fuse boxes on a 95 Lexus LS. The dealership told me that the third one is on the passenger side of the vehicle but i cant find it.Can someone please help me in locating the third?
#10 of 47 Tranny slipping out of OD by movinonout Dec 05, 2007 (6:09 pm)
I have a 91 LS 400....running great, but I have a small issue I need answers to. When I apply the brakes the reverse light indicator on the dash lights up. Also, the car automatically downshifts as soon as the brakes are applied. I think it is electrical posibly to do with anti-lock brakes. Brake lights and reverse lights operate perfectly but, just wanted to see if anyone knows how to fix this problem   Look for a wire bundle on the drivers side trunk hinge that flexes and breaks. this cause your reverse indicator to light up when the brake is applied and also feels like the transmission is disconecting or downshifting. Fix that wire, and your car will not jerk anymore when touching the brake.   movinonout Replies to this message: rhoule (Jan 07, 2008 5:15 pm) vguthrie (Apr 18, 2008 6:56 pm)

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