Lexus Troubleshooting Questions? Ask a Lexus Expert
At any time did this vehicle get jumped backwards or did you accidentally install the battery cables wrong even for a split second? Are you 100% certain the battery did not get charged backwards?
When you depress the brake pedal firmly to the brake lights come on? Do you have a voltmeter with a reasonable knowledge of how to use it or a simple 12 V test light?
Which 30 amp fuses were blown? Did you replace them yet and you still have no power to anything on the instrument panel? Did you check all of the fuses under the hood in that fuse box in the fuse box inside the car? Do you have power to all of the fuses except the headlights unless the headlights are on?
Yes I would disconnect the battery then let me know how it goes tomorrow I will have limited time tomorrow due to family functions for the holidays. Make sure you check voltage to all of the fuses let me know if any do not have power. Or if they're blown.
Do you have a code reader to see if it will communicate with the computer and check for codes? Do you have a voltmeter or test light?
You're going to need to check for power to all the fuses do you have 12 V to all of the fuses outside of the hood and in the fuse block under the instrument panel? This can be done by probing the small indentations on the back of each fuse using a voltmeter or simple 12 V test light. Make sure the key is in the on position.