Nightwolf769

Hello, We have a 2009 Gu713, the truck has no marker lights at all and only high beams come on. I've checked all the fuse and cb's, all appear good. I've tried disconnecting the turn signal switch, no change. I've tried wiggling the wires under the dash, steering column, etc, nothing. I've checked the hood harness, no apparent rub through spots. Anyone have any ideas? Would the turn signal switch affect the markers?

Can anyone positively tell me where the oil pressure sensor is on a mechanical E7-350? It is not on top of the oil filter housing like some people say it is.