Matt, don't sound like ground problem, You get no voltage at the brake pedal switch? Put your voltmeter on that brake fuse and see if it has power. That fuse would be hot at all times, so it should have power. You sure it is a good fuse? If fuse has power look for broken power wire from fuse box to the brake pedal switch. Or use the ohmmeter function and check resistance from fuse to the brake switch.
Should be very low resistance, if high resistance look for bad wire, partially or fully broken.
Is this using europeon lighting or that funny american thing of stop lights indicators all in one .
SOURCE: 1989 Jeep Cherokee - Electrical Problem - horn, brake lights, blinkers, radio/cd...
There could be a fusible link under the hood off the starter relay that is burnt out.
SOURCE: 1989 Jeep Cherokee - Electrical Problem - horn, brake lights, blinkers, radio/cd...
I think I have found the problem. When I wiggle the ignition switch the turn signals and radio go on and off so I feel the issue is in the ignition switch. From what I understand the actual electronics for the switch are at the base of the sterring column behind the lower dash panel and is connected by a rod that may need adjusting.
SOURCE: Dash lights are out
You have all the fuse locations. I have seen some that after radio was put in did that. usually it turns out that re-grounding the dash or using different power supplies for the radio has corrected it. otherwise, I'd check the light switch and make sure it's OK.
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