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Posts Tagged: Chrysler

Chrysler, Ram, Jeep no start

Diagnose and fix a Chrysler, Ram, Jeep no start A Chrysler, Ram and Jeep no start is often caused by a locked Wireless control module. Chrysler vehicles use a wireless control module (WCM) referred to as the Sentry key Remote Entry Module (SKREEM). This module is extremely sensitive to static discharge that can occur during dry or cold winter months when sliding across the seats. When that happens, The WCM lock up and you get a no start condition. This will also disable the remote lock/unlock feature of your key … Read More

Chrysler charging system

Chrysler charging system The manner in which Chrysler charging systems power the alternator field varies depending on which generation PCM you have installed in your vehicle. So consult a shop manual for the exact system used in your vehicle. This is just an overview. In a Next Generation Controller PCM the alternator has 3 wires. The black wire is a contact ground. The PCM sends a pulsed power to the alternator field coil on the dark green wire. The strength of the field depends on the pulse width. The output … Read More

Car overheats – Chrysler Vehicles

Car overheats – Chrysler products People always ask why their Chrysler car overheats. Aside from the mechanical reasons explained here, Chrysler products rely on a solid state radiator fan relay that can cause problems. The relay is usually mounted in the front of the vehicle on a frame rail. That’s great for cooling the relay, but it also exposes it to lots of water and salt. Since the relay is solid state and provides almost 40-amps to the radiator cooling fans, it can get quite hot. The frame rail is … Read More

P1491 radiator fan won’t turn on

Radiator fan P1491 If you own a Chrysler minivan and it’s overheating because the radiator fan won’t turn on, it may be a bad radiator fan relay Many owners report overheating in their minivans because the electric cooling fan will not come on. This may be accompanied by trouble code P1491—Radiator Fan Control Relay Circuit Malfunction. Start your diagnosis at the fan relay module which is located below the battery box on the left frame rail. The Grey wire is hot at all times and fused by fuse #24 in … Read More


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