Question about 1990 Lexus LS 400
SOURCE: my 1991 lexus ls400
The most likely problem is your alternator, the alternator charges your battery while the engine is running, if the alternator is bad you have a dead battery, but you can check with a volt meter to ensure that is your problem. Start your car (use a battery charger or jump to start it if you need to) and put your meter on the battery post's. If your reading 13volts or so your alternator is working and maintaing voltage, however if your reading starts dropping to 10 or less(may take a few moments to drop) then it's probably your alternator. You can also check your battery's voltage before starting your vechile, if the voltage increases after you start the vechile then it seem to be charging. Alternators can be repalced somewhat easily, it's only two boltsm however you do have to remove the fan belt, and re-route after installing the new alternator. If you have some expirence working on cars you can do this yourself in your driveway.
Here's a start for you, hope this helps
Posted on Jul 18, 2008
It sounds like the wires from the battery to the starter solinoid are burned out, possibly even more of them to the main fuse box under the hood. You will have to start looking for the burned wires you can already smell and replace them. Starter and Battery area are a good place to start.
Posted on Dec 12, 2008
You may have corrosion inside your battery cables or a loose connection somewhere.
If you have a voltmeter connect one lead to the POSITIVE post of the battery and the other to the POSITIVE post on your starter while you have a friend crank the engine
WATCH YOUR HANDS!
This is called a voltage drop test and you should see less than 0.5v on the multimeter while you are trying to start it, if you have high resistance (corrosion bad connections) you will see a higher voltage. 0.5v is the MAX you should see.
Do the same test on the ground side of the circuit, connect to the NEGATIVE battery terminal and the starter case, your voltage reading should be 0.1v or less
Posted on Feb 24, 2009
i would check your ignition system. you would need a meter for this but look for broke or loose connections. if it was a fuel problem i dont think it would just start up after 20 minutes. or you might try your ignition switch. if its shorting or something then ya well it would cut your engine off real quick
Posted on Mar 20, 2009
Tips for a great answer:
Feb 04, 2018 | Lexus Cars & Trucks
Oct 31, 2017 | 1996 Lexus LS 400
May 13, 2011 | 1994 Lexus LS 400
Mar 16, 2011 | Lexus LS 400 Cars & Trucks
Oct 20, 2009 | 2005 Lexus LS400
Oct 10, 2009 | 1991 Lexus LS 400
May 21, 2009 | 1992 Lexus Ls 400
May 20, 2009 | 1990 Lexus LS 400
52 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: