F 150 2WD Pickup V8-4.6L SOHC VIN W (1998)
Horn Relay: Testing and Inspection
Horn Relay Terminal Location
Check Relay Continuity
1. Measure the resistance between relay terminal 85 and all other terminals. If any resistance is 5 ohms or less, replace the relay. Otherwise, continue
with the test.
Apply Power to the Relay
2. Use jumper wires to apply battery voltage to terminals 30 and 85. Measure voltage at terminal 87A. If the voltage is less than 10 volts, replace the
relay. Otherwise, continue with the test.
Check Relay Operation
