# Brake Warning Light on Dash - Wacko! **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** brakes, lights\ **Created:** [November 30, 2007, 9:26pm UTC](https://community.cartalk.com/t/brake-warning-light-on-dash-wacko/7857 "2007-11-30T21:26:16Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![millerkrx](https://avatars.discourse-cdn.com/v4/letter/m/b9bd4f/32.png) [@millerkrx](https://community.cartalk.com/u/millerkrx)\ **Post date:** [November 30, 2007, 9:26pm UTC](https://community.cartalk.com/t/brake-warning-light-on-dash-wacko/7857/1 "2007-11-30T21:26:16Z")
My GMC S15 1989 has a brake warning light that flickers off and on when driving. The brake fluid level is OK. All 4 wheel brakes were totally replaced last year.(pads,rotors trued, brake fluid and cylinders were overhauled. Driving mileage is about 3000/year. Brakes work fine. Stopping is uncompromized. Good pedal feel. Does any have any suggstions why this dash light is flickering on/off? Thank you ---
**Author:** ![mr\_josh](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mr_josh/32/3008_2.png) [@mr\_josh](https://community.cartalk.com/u/mr_josh)\ **Post date:** [November 30, 2007, 9:46pm UTC](https://community.cartalk.com/t/brake-warning-light-on-dash-wacko/7857/2 "2007-11-30T21:46:37Z")
I assume that light also comes on to tell you that the parking brake is engaged, and if so, I’d say it’s probably the switch on the pedal malfunctioning. ---
**Author:** ![karl-sieger](https://avatars.discourse-cdn.com/v4/letter/k/c77e96/32.png) [@karl-sieger](https://community.cartalk.com/u/karl-sieger)\ **Post date:** [December 2, 2007, 6:22pm UTC](https://community.cartalk.com/t/brake-warning-light-on-dash-wacko/7857/3 "2007-12-02T18:22:57Z")
Do you have a brake fluid resevoir w/a sensor that measures the actual fluid level in resvoir? If so, bobber at bottom may be partially jammed? Also find wires coming out of resevoir and do a wiggle test while someone eyeballs brake light. Fluid’s gotta be right up there at the line on some models. All else fails, maybe it’s the sensor in resevoir. ---
**Author:** ![karl-sieger](https://avatars.discourse-cdn.com/v4/letter/k/c77e96/32.png) [@karl-sieger](https://community.cartalk.com/u/karl-sieger)\ **Post date:** [December 3, 2007, 2:50am UTC](https://community.cartalk.com/t/brake-warning-light-on-dash-wacko/7857/4 "2007-12-03T02:50:27Z")
W/ignition off, pump pedal a few times to get rid of vacuum assist. Pedal should get hard as a rock as you push on it and hold. W/engine running one can get fooled by the vacuum assist. On the other hand, if you drive truck all the time I guess you’d know it if you had an abnormal pedal feel, but maybe try above procedure for jollies. I wish I could help you more.