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[AS90]

All three of my brake lights have packed up, Ive checked the fuse, what else can I do?

[Mike Pavelin]

Use hand signals.

[Mike Pavelin]

Of course you could check the switch on the brake pedal and also don't forget the obvious a nd have a look at the bulbs.

[AS90]

Ok, how do I get to the switch on the pedal? I dont think all the bulbs would go at once, but then again with my luck    It isn't registering as a fault on the screen either.

[AS90]

Ok, its not the pedal switch, what could it be?  :?

[Mike Pavelin]

What model/year of Jeep is it?

[AS90]

Its a 97 4.0 grand.

[Mike Pavelin]

OK.
At the brake light switch you should have a permanent 12v at pin 6 (red/light green wire)
You should get 12v at pin 5b when you push the pedal (white/tan wire)
The white/tan wire then slits into 4 and goes to pins 2,6,7 and 8 of the lamp outage module (inside the L/H REAR WING) You should have 12v here when you press the pedal.
The power then exits the module on pins 6 and 7 (both pink and white wires) and 8 (dark green and whit wire) and go to their respective light units.
If there is power into the module but not out, it could be faulty. This is the module that gives the bulb failure warning to the centr console display.

[AS90]

Thanks for the help, it was the brake pedal switch after all.