Code 3 - Open Dump Valve Circuit
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 1988 Ford Pickup, 1988 Ford Cab & Chassis, 1988 Ford Bronco II, 1988 Ford Bronco, and 1987 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
- Unplug computer module connector. Check resistance between ground and terminals No. 8 and 14. Terminals No. 8 and 14 are connected together. If resistance is 1-3 ohms, replace computer module. If resistance is over 3 ohms, unplug electro-hydraulic valve connector.
- Check resistance between terminals No. 1 and 3. If resistance is 1-3 ohms, repair open dump solenoid wire at terminal No. 1. If resistance is over 3 ohms, replace electro-hydraulic valve.