TESTING COOLING FAN MOTOR Disconnect cooling fan motor harness connector. Observe correct polarity. Connect battery voltage to fan motor harness connector terminals. See Fig. 1 . If cooling fan motor fails to operate, replace fan motor. Fig. 1: Identifying Electric Fan Motor Terminals (Typical) Courtesy of CHRYSLER CORP. FAN RELAYS & PCM 1. Turn ignition on. Check voltage at Gray wire of radiator fan relay, located on inner left front fender. If battery voltage is not present, check for open or shorted Gray wire. 2. If battery voltage is present, connect jumper wire between Gray wire and Dark Green wire of radiator fan relay. If fan operates, go to next step. If fan does not operate, check for open or shorted Dark Green wire between radiator fan relay and fan motor connector. 3. Check for loose connections at fan motor and fan motor relay. If all connections are okay, check for DTCs. If PCM detects a problem with cooling fan, a RAD FAN RELAY CIRCUIT DTC will be set. Ã TESTS W/CODES - 3.0L - Caravan & Voyager Ã TESTS W/CODES - 3.3L - Caravan & Voyager Ã TESTS W/CODES - 3.8L - Caravan & Voyager Ã TESTS W/CODES - 3.3L - Town & Country Ã TESTS W/CODES - 3.8L - Town & Country 4. If DTC indicates RAD FAN RELAY CIRCUIT, turn ignition off. Disconnect PCM harness connector. Check resistance between PCM connector terminal No. 73 (Light Green/Dark Blue wire) and ground. If resistance is less than 5 ohms, repair short to ground in Light Green/Dark Blue wire. If resistance is 5 ohms or greater, go to next step. 5. Check resistance between fan relay connector terminal No. 2 (Light Green/Dark Blue wire) and PCM connector terminal No. 73 (Light Green/Dark Blue wire). If resistance is greater than 5 ohms, repair open in Light Green/Dark Blue wire. If resistance is less than 5 ohms, replace PCM. NOTE: If fan motor is noticeably overheated, system voltage may be too high. Check charging system. CAUTION: Check cooling fan motor operation before checking fan relay and PCM. Ensure PCM is securely grounded. NOTE: For additional information on DTCs and trouble shooting using DRB scan tool, see appropriate TESTS W/CODES article in ENGINE PERFORMANCE section below. Page 1 of 1 ENGINE COOLING FAN -1997 Plymouth Grand Voyager 11/2/2008 The Fan relay is next to the air filter box, I need the engine size to tell you where the ECT is tho...
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Sunday, November 2nd, 2008 AT 7:33 AM