W100 1/2 Ton Pickup 4WD V8-360 5.9L VIN 1 4-bbl (1988)
Spark Control Relay: Testing and Inspection
Dual Pick-Up Start Run Relay
1. Disconnect the two way connector from terminals 4 and 5 of the Dual Pick-up Start-Run relay.
2. With an ohmmeter measure the resistance from terminal 4 to terminal 5.
3. If resistance reading is not between 20 and 30 ohms replace the Dual Pick-up Start-Run relay.
