I have no headlights,how can I test switch and is there a relay for headlights?

There is no "relay" per se for the headlights. The switch doesn't actually switch power to the headlights. It's only a signal to the body control module (BCM). When the BCM receives a signal from the headlight switch, it switches power to the headlights. There is no mechanical relay in this system. Headlight switch is a fairly high failure item on Chrysler products, so the first thing you want to do is use a scan tool to see if the BCM is actually getting the command to turn on the headlights. If it is, then you've either got a bad BCM or a wiring issue from the BCM to the headlights.

there could be a black plastic box that has fuses but also you will find relays. From the relay you can find the socket that feeds 12v directly into the headlight and see if headlight is ok and if the relay is suppling 12v to the headlight. Also from the relay you can also check if the switch is supplying 12v to the relay coil with a voltmeter or a 12 volt probe tester. you may have a faulty relay but you could test this via a volt meter.
you may have blown globes by getting a wire and putting terminal connectors that match the relay legs and manually supplying the 12volts to the headlights from the relay socket you can test if the globes light up . So basically you are doing the relays job

could be blown headlight on low beam filaments in globe.
other possible causes - headlight relay
check if there is voltage at the relay coil being switched thru. if not the headlight switch could be faulty. get a piece of insulated wire - strip the ends and bypass the relay by passing the +ve voltage wire to the headlight side. this replicates the relay function. thus testing if switch is faulty in providing power to relay coil.

Headlamps Inoperative - Low Beams

Step

Action

Value(s)

Yes

No

DEFINITION: This diagnostic procedure should only be used if the high beam headlamps are operating properly and the low beams are inoperative.

1

Did you perform the Headlights System Check?
--
Go to Step 2
Go to Headlight System Check

2

1. Turn the headlamp and panel dimmer switch to the ON position.
2. Move the headlamp dimmer switch to the LOW position.
3. Backprobe the headlamp dimmer switch connector with a J 35616-200 from cavity A to ground.

Does the test lamp light?
--
Go to Step 3
Go to Step 5

3

1. Remove the daytime running lamp relay.
2. Connect a J 35616-200 at cavity G5 to ground.

Does the test lamp light?
--
Go to Step 4
Go to Step 6

4

1. Re-install the daytime running lamp relay.
2. Backprobe cavity B at the high/low beam headlamp with the headlamp dimmer switch in the LOW position.

Does the test lamp light?
--
Go to Step 7
Go to Step 8

5

Replace the headlamp dimmer switch.

Is the repair complete?
--
Go to Headlight System Check
--

6

Repair the open in CKT 359 (PPL) between the headlamp dimmer switch and the daytime running lamp relay.

Is the repair complete?
--
Go to Headlight System Check
--

7

Replace the high/low beam headlamps.

Is the repair complete?
--
Go to Headlight System Check
--

8

1. Inspect for an open in CKT 12 (TAN) between the daytime running lamp relay and S120, repair as necessary.
2. Replace the daytime running lamp relay if no open was found in CKT 12 (TAN) between the daytime running lamp relay and S120.

Is the repair complete?
--
Go to Headlight System Check
--

check your headlight fuse with the switch in the on position. easiest way I have found to rule out a relay is to simply switch it out with another relay.

I don't have a diagram of the circuit so I can't give you wire colors.
The relay should have a diagram on the side of it showing the pins.
One pin is power to the relay magnet, the other is ground for the magnet. The magnet closes a switch which is power for the headlights and the wire to the headlight fuses.
You would jumper the power in and out for the headlights to bypass the relay - or use a test light to see if you are getting the right voltage on each pin. If you ground the relay with a test light the relay magnet should close the switch.

[Information] For a 2002 Toyota Camry, the Daytime Running Lights (DRL) operate utilizing the High Beams (inner Lamps closer to the center of the vehicle front) at a reduced power.

[The troubleshooting process:] Review the Owner's Manual and ensure the test configuration matches the following criteria:
1. According to the 2002 Toyota Camry Owner's Manual (Check your Owners Manual):
"The DRL system will make your headlights come on at a reduced brightness when:
The light switch s in the "DRL" position.
The ignition is on with the engine running.
The headlight switch is off.
The parking brake is released."

2. Set the Test Conditions according to Step 1 above.

3. Check the headlight bulbs to ensure they are not burned out. If one burns out, there is a fair chance that the other would have burned out at the same time. Replace as necessary. In this case, if the high beams operate, the DRLs should also operate.
4. Test the system, ensuring the step 1 conditions are set. (Engine running, Multi-function Switch on Turn Signals in "DRL" position, headlight switch off (repeating what the manual says -- it should be obvious that in the "DRL" position, the headlight switch should be off / do not have the switch positioned to "High Beam"), and the Parking Brake "off").
5. If DRL lights do not work, check the engine compartment Fuse and Relay Box. there is a 5 Amp DRL fuse -- replace it with the spare. Test (step 4).
6. If it does not work, swap around or replace relays -- there are three (3). Any one of them could be bad (stuck or burned out). Test (step 4).
7. Other less likely possible issues could be that the Multi-function Switch is broken or a connection / wire is broken. [Beyond the scope of this process.]

My problem was that the test configuration did not have the engine running and parking brake off - Step 1. Problem solved with much thought, repetitive tests on the vehicle and going back to the basics -- what does the Owner's Manual say and where are the applicable fuses and relays located?

First check fuse. If OK, find headlight relay in relay box under hood. Turn on lights, pull relay out, and use a test light to test each terminal in the socket for power. There should be 2 hot terminals, one from th ebattery and one from the switch. If you have only one, your switch or wiring are bad. Next, plug the relay back in and listen for a click as you do. If you had 2 hot terminals, the relay should click. If not, replace the relay. If you have 2 hopt terminals and the relay is working, the problem is in the wiring going form the relay box to the headlights. If you have more questions, please let us know.

CHECK THE DRL RELAY + HEAD LIGHT RELAY.

1. You can never test a fuse by looking at it, you must physically test it with a circuit tester.
2. Your problem is either in your headlight dimmer switch or your headlight relay.
For location of relay, go to your local Autozone and ask to be shown its location.