Jeep 4.7L Index of Articles

Jeep PWM Fan Relay Test Troubleshooting An Overheating Condition

Jeep PWM Fan Relay Test Troubleshooting An Overheating Condition

This article will help you to diagnose the Pulse Width Modulated (PWM) Fan Relay on the 1999-2004 Jeep 4.0L Grand Cherokee SUVs and/or the Codes P1491 (Radiator Fan Control Relay Circuit). The dealer, at the time of this writing, will charge you...   read more >>