Econoline E350 1 Ton V8-5.4L CNG VIN M (1999)
Component Testing Procedure
Schematic
NOTE: Use three No.10 (or larger gauge) juniper wires and 73 Digital Multimeter to test the horn relay.
1. Remove the relay from the power distribution box.
2. Using a multimeter, measure the resistance between Terminal 85 and all other terminals. If the resistance is 5 ohms or less, replace the relay. The
resistance is greater than 5 ohms, continue the test.
