Buick Repair Questions? Ask a Mechanic for Answers ASAP
Hi my name is ***** ***** I will be happy to assist with this today.In some cases I may need more info to assist better.I apologize for any delay.
Has anything been checked or tested for this issue here at all?
Let me know so we can continue,thanks Pete.
Does the 3rd brake light work at all with this issue here?
Is this a 2 door or 4 door model?
Have you checked the bulbs in the 3rd brake light to see if the bulbs are burned out at all?
O.k.,the left and right brake light signals run from the brake switch on the white wire to the turn signal/multi function switch then out of this switch to the left and right brake lights.It is common for the turn signal/multi function switch to fail and cause this issue here but the 3rd brake light is on a separate circuit on the same white wire from the brake switch.Usually this light will work if it is the turn signal switch at fault.My guess from here is that the turn signal switch needs replaced to correct the left and right brake light issue and the 3rd brake light bulb(s) are burned out needing replaced as this is most common.If you find the 3rd brake light bulb(s) are o.k. let me know.
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I apologize for the delay.
O.k.,this indicates the brake switch is o.k. as well as the white wire.The fault is in the multi function/turn signal switch itself.This fails commonly and causes no voltage to the left and right brake lights with the switch needing replaced.
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