My headlights will not turn on on my licoln ls

check battery, also alternator

Hi Bd, If the washer reservoir motors are working and the reservoirs are not leaking and have the cleaning fluid, it's very possible and highly probable that the nozzles are blocked with dirt. Disconnect the pipes, and then put on a pair of safety goggles, Place an air hose over the outlets and open the compressed air, blowing backwards. Connect up the washer pipes and hey presto, clean screens! Regards John

Check the fuses and relay. It could be the wiper motor going out as well

Learn how to test electrical circuits ! Find a wiring diagram so you know which wires to test . Free wiring diagrams here http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model and engine size . Under system click on body & accessories , then under subsystem click on wipers / washers .Check B+ voltage and ground circuits .
Wiper Motor Switch Troubleshooting
Windshield Wiper Motor Wiring Tutorial

So what youre saying is the wipers work when the headlights are on
but the wipers dont work when the headlights are off?

I would suspect the turn signal switch is bad. I believe the switch on your S-10 controls
the wipers as well as switching from high beams to low beams. Since that switch is related
to the control of both headlights and wipers.

Could also be the headlight switch. The wiring harness from the turn signal switch plugs
into the headlights switch. I would replace the headlight switch first since you can get one
for around $25. Turn signal switch costs $150-$200. Maybe a little more or less for your vehicle.

the wiper could be a fuse or the wiring, the heat issue could be it's low on coolant?

wiper motor is under the hood check for continuity and power will switch is on could be ur motor which u can change ur self probably 100 bucks for a lexus

The switch for the rear wiper is on the actual windshield wiper switch for the front wipers, you have to push the lever forward to turn it on and then again to turn it off, to use the washer fluid for the rear wiper you push the same lever forward and hold it there till the washer fluid comes out.

If your car is under 36000 miles take it to your dealer and have it fixed under your warrenty. All of your interior electrical systems are controled by computors and sometime not a simple repair ! The dealer has the tools to monitor different switch states to aid in isolating the problem. Just guessing if its a switch or a computor or a wiring issue can get very costly.

Hello ilandskater2,
It sounds like you may have caused a plug for the lights to come undone or you lost the ground to one side of the car. Some newer vehicles use a reverse type ground system with small computer controlled relays in the system. It sounds like you are getting a reverse feed on the power system under the hood. look at all the plugs and check to see if they are completely pluugged in and check the fuse block to see if any are blown causing the feed back. Check all the grounding points under the hood also. Hope this helps. Regards, rcampsr