![]() ![]() ![]() This usually means that the motor in the sequencer has quit. Purple and orange/green wire, the turn signal switch may be bad. The yellow/yellow-black/yellow-red wires, the relay is bad. If there is power on it and flashing power on The 14-pin directional relay in the trunk. No right turn signals:With the turn signal switch pushed down, check for 12V power on the purple wire feeding The white and orange/green wire, the turn signal switch may be bad. On the yellow/yellow-black/yellow-red wires, the relay is bad. If there is power on it and flashing power No left turn signals:With the turn signal switch pushed up, check for 12V power on the white wire feeding When replacing the turn signal switch, make sure the connections follow this diagram: 1967/1968 Turn signal switch connector pin diagrams 1967 or 1968 Turn signal switch connections Securely seated into the connector and the connector is not melted or burned. Oxidized: carefully inspect the pins on both sides of the connector. ![]() The turn signal switch connector pins can also be burnt or In the area around the emergency button appears to be burnt or melted. Usually the switch has failed when the plastic around the riveted contacts Should be shorted together with the switch in the indicated position. Disconnect the turn signal switch from the harnessĪnd check it according to Table 1 using a VOM or self powered test light. The turn signal switch is most likely bad. Next try depressing the emergency switch, if the emergency flashers work, Tucked up under the dash to the right of the steering column. The 15A turn signal fuse, for the Cougars, is located in a white twist-apart fuse holder Lack of power indicates either a bad turn signal switch or fuse. Start by checking for 12V power on the orange/green wire feeding the motor-driven A click from theĭirectional relay in the trunk may be heard. When the turn signal lever is depressed, no lights come on anywhere. If these areĪll good, then now the real sleuthing must begin! Next stop is to check all bulbs and their sockets. In-line fuse under the dash to the right the steering column. On but not flashing, one or more lights flashing, and center andįront lights only flashing. Most common complaints are: no turn signals, one or more lights (Volt-Ohm-Meter) and the circuit diagram for your year car. System works, you can start troubleshooting. Now that you understand a little about how your turn signal Signal switch is actuated, the brake light power feed isĭisconnected and the turn signal feed is activated to allow theĭirectional signal to override the brake lights. When the brake light power feed is energized. The directional relay allows all lights to turn on simultaneously Two-sectioned (right and left) relay routes power through to the Together for T-Birds.) and then to the directional relay. The emergency switch is on for Cougars and connects all lights The power is then routed first through theĮmergency relay (which disconnects all but the center light if The sequencer has three cams that, when rotated,ĭepress switches corresponding to the inboard, center, and Power for the lights is fed through the turn signal relay to the That select and feed power to the corresponding bank of lights. Lever on the turn signal switch is moved, it completes circuits The appropriate year factory shop manual.īasically, the system works as follows: when the directional The most failure prone partsĪre the mechanical sequencer, the turn signal switch, and theĮmergency relay in the trunk. The 1967 system also has an emergency relay and a In the driver's side trunk under the mat or behind the backseat Relay, an emergency relay, and a motor-driven sequencer (located Parts: the turn signal switch, (located in the steering column),Ī turn signal relay (located under the dash), a directional The turn signal system has five electro-mechanical ![]() This information is alsoĪpplicable to 1967-early 1969 T-Birds as they share the same basic While most the information has beenĪcquired through experience on a 1968 model, the ideas can beĪpplied when servicing a 1967 model too. This article covers troubleshooting 1967-1968 Mercury Cougar Troubleshooting 1967-1968 Cougar and Thunderbird Sequential Turn Signal ![]()
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