Got 85 B350 an I have no dash lights or park lights. Any ideas what might be wrong?

 

Blown fuse.

 

I already replaced all the fuses in the fuse box that is inside the glovebox

 

nothing specific to check, but known issue is bad ground connections on these old vans... check and clean or make a new wired connection between NEG on battery, and the chassis and the check the ground strap connection from the frame to the engine...

use any good wire about 10-12 guage for battery to chassis ground... keep it short...

use a product like Deoxit cleaner 5% (search amazon) and open up then spray all connections that you can find

 

read online that some people say there is a wire below the cig lighter that can cause this. Said it is a wire that can come loose an cause the dash lights an park lights not to work. The people talked about this on newer vehicles 90's an up. Does these vans have this wire? Also the bulb above my license plate does not work either.

 

often license plate bulb sockets rot with rust and the whole socket can be replaced with a part from NAPA