Just a thought, unplug the brake switch. Use a test light between the terminals where the stop fuse plugs in. If lite comes on, the problem is before the brake switch. or the brake switch wire connector.
There might be a connector at the rear for stop lamps, unplug it. See if the test light still comes on?
Keep going if those didnt fix need to check harness for short or damage
SOURCE: 98 gmc suburban brake lights
One of two things cause this corroded or poor chassis earth at the bulb holders or the circuit board that holds the bulb is faulty.
SOURCE: Brake lights quit working.
if all fuses and bulbs are ok get to the brake switch and see ifits stiff or stuck, if it just has two wires on it you could join themtogether to see if the brake lights come on though obviuosly dont leave them joined.Good luck davelee
SOURCE: i have a 1990 chevy s10,all my lights work except my brake lights
Do you have power with a test light in and out of the switch? Do the turn signals work? Will the brake lights work if you play with the turn signal handle?
SOURCE: No Brake Lights 1993 Chevy Astro Van
Check the ground wire & leads, if not try the multi-function switch in the column
SOURCE: Brake lights don't work. Replaced bulbs, checked
Yes, you need to of course check the voltage coming into and going out of the brake light switch, if 12 Volts are there going out and coming in while pressing on the brake pedal, your brake lights aren't getting a good ground or there is a break in the circuit between that switch & the lights.
On occasion the tail lights will work with a weak ground circuit where the Brake lights won't. Best way to determine this is to just hook up the 12 volt tester to the Brake light hot wire & there at the bulb ground, then in an area away from the bulb that has a good possibility of contact/ground.
Really that's it, if the 12Volts is getting to the bulb but it isn't lighting, if you aren't getting the voltage there and the brake switch is hot on both sides when pressed, the break in voltage will have to be traced from that switch to the tail light to find the problem.
good luck.
96 views
Usually answered in minutes!
×