Ranger 2WD L4-153 2.5L SOHC VIN C SFI (1998)
Trailer Lighting Relay: Testing and Inspection
Relay
Testing an ISO relay can be accomplished through the use of three No.10 (or larger gauge) jumper wires and 73 Digital Multimeter. Remove the relay to
be tested from the power distribution box, fuse junction panel or individual connector.
