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Posted on Jan 02, 2017
Test the circuit board wires on the back side of your taillights where the bulbs go in to see if power is going there with the blinker on, if yes replace the circuit board (quite common with these trucks). If there is no power back there check your flasher relays for each turn signal, assuming they dont click off and on when you tip the turn lever. if all else fails, head for the multifunction switch behind your steering wheel inside the column that your turn signal/wiper/cruise control lever is connected to.
Posted on Mar 15, 2009
The blinkers have a relay under the dash on the driver side. It sounds like your relay isn't working. As far as the reverse lights, there is a switch inside the steering column. So when you put the truck in reverse, it closes the switch and turns on the reverse lights.
Posted on Sep 18, 2010
SOURCE: 1993 buick lesabre, the blinkers
The unit for the emergency and the flasher is usually the same unit as your possible problem is in the selector switch of the flasher/blinker which is the multiple point cluster switch.
It will be good to start the test using a multimeter to trace the voltage to the switch, if absent check the fuse market in the fuse box.
Since the emergency is working the unit seems working fine and hence your cluster switch must be double checked because the trigger positive to the unit from the switch is absent.
Cross and test with +12 volt to confirm.
Posted on Oct 26, 2010
Well the brake light and turn signal circuits are on two different fuses, but they both go thru the turn signal switch.
So I would start by checking for power in and out of the turn signal switch for each circuit.
Posted on Apr 07, 2013
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