I have a 1999 Jeep Wrangler with the 4.0. As I was coming home from work today I noticed that when I apply the brakes the mileage gauge on the odometer DIMMs and so does the radio. I checked to see if my brake lights bulbs are burnt out but they are not. I also noticed that my turn signals are now lighting up when I hit the brakes. I have not done any aftermarket wiring or whatnot. Please help!!!
My guess is a high amperage draw when you complete the brake light circuit likely a fault within your turn signal switch. You know, you also might want to check your third brake light wires/contacts for a grounded hairs/ wire.
I keep reading about a fault in the switch. Its fairly new itself- but from autozone...will check the third brake light wires- but why the eff do the side marker lights go on when i hit the brakes
Sounds almost like a back feed due to open or poor ground in the lighting circuit
Start by un plugging things that are effected one at a time also you can pull fuses one at a time and isolate that circuit than find what's in that circuit plug fuse back in than unplug stuff one at a time see if you can isolate you can also ground stuff manually as you go along
Hope u can find it
Changed switch. Same symptoms. Removed side marker light bulb as it looked dim- switched with passenger side...no symptoms anymore...going to replace the relay for the hazards just to be sure...replaced the side light bulbs as well...