RAM 1500 Truck 2WD V6-3.9L VIN X (1999)
Powertrain Control Module: Service and Repair
PCM Location And Mounting
The PCM is bolted to the firewall in the right-rear side of the engine compartment.
REMOVAL
To avoid possible voltage spike damage to the PCM, ignition key must be off, and negative battery cable must be disconnected before unplugging
PCM connectors.
1. Disconnect negative battery cable(s) at battery's).
2. Remove cover over electrical connectors. Cover snaps onto PCM.
3. Carefully unplug the three 32-way connectors from PCM.
4. Remove three PCM mounting bolts and remove PCM from vehicle.
INSTALLATION
1. Install PCM and mounting bolts to vehicle.
2. Tighten bolts to 4 Nm (35 in. lbs.).
3. Check pin connectors in the PCM and the three 32-way connectors for corrosion or damage. Repair as necessary.
4. Install three 32-way connectors.
5. Install cover over electrical connectors. Cover snaps onto PCM.
6. Install battery cable(s)).
7. Use the DRB scan tool to reprogram new PCM with vehicles original Identification Number (VIN) and original vehicle mileage. If this step is not
done, a Diagnostic 'Trouble Code (DTC) may be set.
