Q: How to check and replace the turn signal switch/headlight switch on 1996 through 2002 Toyota 4Runner?
A: Take the connecting wire off the battery terminal that's negative, and turn off the audio system's anti-theft feature if your car has one. Take out the airbag control system first, then remove the steering wheel and its covering. Take the electrical connection off the turn signal and headlight switches. Using an ohmmeter, check the continuity of the switch terminals: Taking off the switch cover and steering wheel, the test must show three different connections: no connections should happen when the stalk is centered, one connection should be across terminals 1 and 2 when turning left, and one connection should be across terminals 2 and 3 when turning right. If the switch doesn't operate, replace it. To replace the switch, first take out its screws, then disconnect it from the switch body. Reinstallation goes the other way, just make sure the spiral cable is centered before you put back the steering wheel.
Q: How to check and replace the turn signal switch/headlight switch on 1995 through 2004 Toyota Tacoma?
A: Whether your vehicle has an anti-theft audio system or not, safely remove the negative car battery cable. Also switch the lockout feature off if your car has it. Turn off the airbags, pull out the steering wheel, and discard the steering column covers. Detach and remove the electric cable that connects the lights with the turn signal switch. Using an ohmmeter, check the continuity of the switch terminals: When you hold the turn signal stick still in neutral, there shouldn't be any electrical connection between the switch terminals. If the switch doesn't operate, replace it. Loosen the two screws holding the turn signal and light switch to its body, then put everything back together, taking care to center the spiral cable when you fix the steering wheel.