SOURCE: 1998 chevy lumina brake lights intermittent.
This is a classic example of turn signal switch failure. On GM vehicles with a multi-function turn signal switch and combination stop/turn/tail lights (all rear lights are behind red colored lenses except for back-up lights) The brake light power is routed through the turn signal switch. This makes it possible for the right rear light to function as a stop light while the left rear turn signal flashes, and vice-versa. When the contacts fail to remain constant the brake lights, and turn signals can become intermittent. The proof that the brake light switch is functioning correctly is that the high center (cyclops) brake light functions properly. Wiring integrity is verified if you can prove that turn signals operate, but that can still be intermittent with this complaint, BUT if you use your hazard switch to turn on all the signals at once, you can verify wiring integrity. This is because the turn signal, and the brake light use the same circuit, and bulb filament in the rear lighting assembly. If any Hazard lights fail to function, check bulbs first, then retest. If all Hazrd light flash correctly and reliably, bulbs, sockets, and wiring have proven integrity, and the turn signal switch is the remaining component in the system which needs to be tested. Unfortunately, this switch requires disassembly of the steering column for service, testing or replacement. If you have never disassembled, and successfully reassembled a GM tilt steering column, I would reccommend professional assistance.
SOURCE: brake wiring diagram chevy lumina
why not just replace the turn signal switch must faster and safer . buy one from your local parts house then you can see its not that easy to install but you can do it with a little help
SOURCE: brake lights don't work on 97 chevy lumina sedan
Had the same issue in the spring. Replace the turn signal switch. A general weakness in the switch in these years. Replacement solved the problem in my 97 Lumina.
SOURCE: brake light problems on a 2000 chevy lumina
Will your Center High-Mount Stop Light
(CHMSL) illuminate when you depress the brake pedal, but the lower/outer lights will not?
-- Do you have to hold the signal lever in a
certain spot to get the turn signals to flash?
-- Do you have to hold the signal lever in a
certain spot to get the lower/outer brake lights to illuminate?
-- Will the signals work in one direction,
but not the other?
If you answered yes to any of the preceeding
questions, your turn signal switch is likely malfunctioning.
**One more question before we continue: Is
the turn signal lever not "cancelling" (returning to the "off"
position) after you make a turn? If this is the case, you have a broken
"cancelling spring."
Before you begin disassembly of your steering
column, verify the turn signal flasher is not malfunctioning. If your brake lights
work fine, but not the signals (either direction,) then it's likely the flasher is burnt
out. The flasher itself is located underneath the dash near where the steering
column passes through the firewall
SOURCE: 97 chevy pu 305 vortec, had cyl 6 misfire and
thats usually a sign of a vacuum leak, recheck and make sure you don't have any loose hoses, or cut intake seals
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