2000 Ranger. Code reader will not come on when connected to vehicle. I know reader works on other vehicles. Is there a fuse that could cause the port to not work.
Truck has check engine light on and runs like crap, need to retrieve codes.

 

does it have new batteries?

 

my reader doesnt have batteries, it receives power from the port.

 

maybe you have a bent pin in the port or in your connector
what other vehicles have you tried it on?

 

have a 2001 F150 and 2001 Explorer, works perfect on them. OBD tester is brand new, doubt there is a problem with it.

 

so check your port on the vehicle