So it sounds like you have intermittant power or grounds like I said. So right now you have a connection, next time you hit a bump, you might not have a connection anymore.
What about the lights that were flashing on and off? The exteriror lights are on a relay.
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BroncoJoe19
2006 Alt Fuel Jeep (electric)
'98 windstar 3.8L
'99 Crown Vic 4.6L
'90 Full Size Bronco 5.0L
I'm not a professional mechanic, take my suggestions with a grain of salt, or a cup of coffee 
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