Many vehicles use a turn signal switch that is separate from the multifunction switch. The steering wheel will have to be removed to gain access to the turn signal switch on these vehicles. The following procedure is a common method of turn signal switch replacement:
- Place the fender covers on the fenders.
- Disconnect the negative battery cable.
- Remove the steering column trim.
- Remove the horn pad from the steering wheel.
Steering wheel attachment. Courtesy of General Motors Corporation, Service Technology Group.
- Remove the steering wheel and horn collar.
- Use a suitable puller to remove the steering wheel.
- With a suitable compressor, compress the preload spring to the lock plate. Compress the spring only enough to remove the snap ring.
To remove the snap ring, use the compressing tool to relieve the pressure against the snap ring. Courtesy of General Motors Corporation, Service Technology Group.
- Use a pick and a small flat blade screwdriver to remove the snap ring.
- Remove the lock plate, horn contact carrier, and spring.
- Remove the bolts at the upper steering column support and the upper mounting bracket from the column.
- Disconnect the turn signal wiring connector.
- Wrap tape around the wire and connector.
- Remove the hazard warning knob from the column.
- Remove the switch retaining screws and remove the switch.
Remove the turn signal switch from the column. Courtesy of Chrysler Corporation.
- Replace the switch and reverse these procedures for reinstallation.
On vehicles equipped with cornering lights, the turn signal switch has an additional set of contacts that operate the cornering light circuit only. The contacts can receive voltage from either the ignition switch or the headlight switch. If the ignition switch provides the power, the cornering lights will be activated any time the turn signals are used. If the contacts receive the voltage from the headlight switch, the cornering lights do not operate unless the headlight switch is in the PARK or HEADLIGHT position.
The most common complaints attributable to the flasher are too fast or too slow of a flashing rate. If the flasher is of the wrong type and rating, the amount of time required to heat the coil will differ from what the manufacturer designed into the circuit. Also, newer flashers that use electronic circuits will flash at an increased speed if one of the turn signal bulbs is burned out or the circuit is defective. If the flasher is rated higher than required, the flashing rate is reduced because it takes longer for the current to heat the coil.
Check the size and type of light bulbs in the circuit. Use only the lamp size recommended by the manufacturer. If these checks do not correct the problem, test the generator output. Higher or lower voltage output than specified may cause the flasher rate to be incorrect. If the charging system output is within specifications, check for excessive resistance in the turn signal circuit. Check both sides of the circuit.
If none of the turn signals operate, check the fuse. Next, check the flasher. Remove the flasher from the fuse box. Connect a jumper wire across the fuse box terminals. If the turn signal lamp operates with the lever in either indicator position, the flasher is faulty. If the lights still do not illuminate, test the turn signal switch.