1989 Jeep Cherokee Laredo brake lights wont turn on?

Answer 1

First thing is to check the fuses and relays. You should have a fuse box under your dash probably near the pedals, another fuse box under the hood probably on the passenger side. If fuses are good check any brake relays, if not sure how to check them take them to a parts store and they should be able to diagnose them. Next, check your bulbs, should be just a few screws to loosen on your brake lights, once again if you're not sure if they're okay parts stores are great just show them the bulb and they will know if it's bad. Now is a good time if your bulbs are good to make sure the ground wires and other assembly wires are connected going to the bulb. If those are good, check under the hood for any wires not connected to anything. If there's some wires loose they just might be for the brakes. Check especially for all ground wires, the ones that connect to any metal part of the car. If all those possibilities are exhausted, check your brake master cylinders, if there's a problem with braking performance this could be the cause, just trace the brake lines to cylinders, should be silver in color. Make sure wires are connecting to them, if there's any frayed wires or disconnected wires that would do it. If still a problem exists you may have to use a mechanic, you could always call shops and ask for advice some are quite willing to offer advice and if they don't want to you should stay away it may mean they just want you to come in and spend money, good luck.