The turn signals on your vehicle are computer controlled by the BCM - body control module . The first place to start would be to hook up a scan tool that can access BCM DTC'S an data Parameters. If all the turn signal bulb's are good .
Turn Signal Lamps
Ground is applied at all times at G201 to the turn signal/multifunction switch. The turn signal lamps may only be activated with the ignition switch in the ON or START position. When the turn signal/multifunction switch is placed in either the TURN RIGHT or TURN LEFT position, ground is applied to the body control module (BCM) through either the right turn or left turn signal switch circuit. Battery voltage is applied at all times to the BCM. The BCM then applies a pulsating voltage to the front and rear turn signal lamps. Ground for the front turn signal lamps is supplied at G104. The left rear turn signal lamp is supplied ground at G402 and the right rear turn signal lamp is supplied ground at G401.
High resistance some where in the turn signal circuit could also cause this type problem . Doing voltage drop testing on the circuit would find a problem of high resistance .
High Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia
SOURCE: Replacing front turn signal bulb on 2006 Cadillac SRX
wow i feel sorry for you because Cadillac designed this bulb to be a don't get to bulb but OK here's what you do take the bottom cover off or skid plastic panel under neath the front end theirs little plastic clips holding it on just get come dikes and don't cut them but just use it to help pull them out. after you get that off use a flash light and locate your light housing you should see two screws holding the house in i think those screws are 8mm i cant remember remove those two screws and be careful the metal from the bumper cuts you pull the light housing out and remove all the screws around the housing and open the housing up replace the bulb and make sure your contact to the bulbs clean and then reassemble the way you took apart. if you cant get it well then best bet is take it somewhere i know Cadillac charges an arm and a leg so you can go somewhere else.
SOURCE: LEFT TURN SIGNAL FLASHING TOO FAST
when a turn signal indicator flashes faster than is normal it is your vehicles way of telling you there is a problem with the lighting system, do a visual check of your turn signals and you will find a burned out bulb. just replace the bad one and it will return to normal
SOURCE: I need to change the left front turn signal bulb
hi Paul
Should be able to open the hood remove plastic headlight cover & pull pins (2) on light assembly whole light assembly will pull out then replace turn signal.
Good luck.
Gday mate, we had a problem with another late model vehicle similar to that, the bulb that was put into the reverse light was not exact brand product ( ohmage was slightly wrong ) and fowled up computer, correct bulb in place and disconnect battery to reset K A M ( keep alive memory) problem solved, BEWARE, some vehicles cannot have KAM reset except for dealer computer tethered reboot , just try putting the factory correct bulb(s) in and see how it goes, geoff. hope this helped.
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