If you remove the plug from the switch and jump the plug with a paperclip and the lights come on, its your switch.
With an ohmeter or a self-powered test light. Hook the two leads of your tester to the terminals on the brake light switch. Push down on the brake pedal and if the light stays off or the meter stays at infinity, the switch is bad.
I have to suggest the light switch is bad. A simple voltmeter or test light may help you test voltages. I have to suggest the light switch is bad. A simple voltmeter or test light may help you test voltages.
You've got to use a test light to see if there is electricity getting to the switch. First check to see if it's getting past the fuse - then to the switch with the switch off - then through the switch with the switch on - finally to the blower motor.
I guess you'll have to take the door panel off and unplug the motor. Take your test light and clip the lead to ground and poke the sharp into one side of the connector that comes from the switch while you activate the switch while the key is on. If your test light lights up (try both sides of the connector) then your motor is probably bad.
Switch ignition on connect LED test lamp between terminal 7 of the diagnostic connector and earth after 3 seconds 5 green LEDs will illuminate Switch ignition off.
Use a test light to determine Connect to ground and one side of the switch - if the light illuminates that is the HOT side if light does not illuminate that is the COLD side of switch
Put a test light or a an ohm meter between the two leads. Push in or out depending on what kind of brake switch you have. If the ohm meter shows continuity or the test light lights up the switch is all right.
use a test light with the alligator clamp attached to a ground and use the probe to test each side of the switch for power
Use a test light connected to the fan motor - if it lights fan motor is bad if it does not light could be fuse, relay, switch, or resistor
most likely the brake light switch burned out. you would find that switch on the brake pedal itself. easy to replace.easy way to test would be unplug it if the lights goes off you found the problem. u need to replace the stop light switch on the brake pedal
One post should always be hot.. verify that with a test light.
Standard shift or automatic.
It can be the dimmer switch. It needs to be checked out./ A test light will check for voltage.
Unhook wires from switch make sure you mark them so you can put them back on properly. Put a battery powered test light on terminals in and out of switch try switch if the light goes on and off when you move the switch then it is working and you have other problems.
First uf all, The computer has nothing to do with the 4x4 on this year truck. If your check engine light is on , Then there's a problem in the system wiyh the engine or transmission, Not the 4x4. You need to check the 4x4 Actuator on the front housing to see if it has power going to it when you ingauge the 4x4. Check it with a test light. If it lights up the test light, Then replace the actuator in the housing. If it don't. Then go to the top of the Transfur case and you will see a switch on it. Check it with a test light, With the 4x4 ingaged, if its hot there then replace that switch. Before you do anything check the 4x4 Fuse's in the fuse box with a test light.
get a test light and see if there is juice going into the switch and juice coming out of it.
Use a test light or a multi-meter to check for power going through the switch when it's depressed or for ohms depressed.
On the "hot"wire that comes from the breaker panel the voltage should be from 115 to 120 volts. This is taken from the "hot" wire to either the neutral or the ground wire. If its not then you have a breaker problem or you are on the wrong scale of the test meter.
Use a test light on the wires just before the motor to test for power if no power you can test for power at the switch/// you can test the motor by runing power from the battery.
Check your fuses first. If those check out, pull out the tail light assemblies. Check the bulbs. If those check out, test for power at the connectors to the tail light assemblies with a test light. If you have power to the brake light circuit (with the brake applied), then the issue is in the tail light assembly. If not, go to the brake light switch located at the top of the brake pedal. Test for power at the input... there should be constant power to it. If not, there's an issue with the power supply, and you'll have to trace it to the fault. If so, test for power at the switch output with the brake pedal depressed.. if there's no power there, the switch is faulty. If there is power there, then you'll have to trace the wiring towards the tail lights to find the fault.
easiest way to check is to cover grill in front of radiator and start engine cover will restrict air flow and make engine heat up.by watching temp gauge you should have a fair idea when fan should switch on.if it doesnt switch on you know relay or swith is not working. you can then check switch with a test light to see if it has poer on both sides. pretty much test relay the same way relay will only test when hot enuff to turn on fan
you have to pull the feed wire off the brake switch to supply power to the new third brake light. get a test light and test the wires on the brake switch....one is hot all the time the other one gets hot when you depress the pedal....that is the one you need. do not take it pull your power from the rear light it might have an intergrated turn signal wire. which would make your 3rd brake light blink.. ok.have fun! you have to pull the feed wire off the brake switch to supply power to the new third brake light. get a test light and test the wires on the brake switch....one is hot all the time the other one gets hot when you depress the pedal....that is the one you need. do not take it pull your power from the rear light it might have an intergrated turn signal wire. which would make your 3rd brake light blink.. ok.have fun!
The switch is out or you have crossed wires-it's still getting current. Use a test light with switch off on hot wire between switch & motor. If there is current, your switch is bad.