Wire runs from right rear of the ignition module (Under the coil pack) down the back side of the engine through the exhaust manifold (That's the problem) and to the rear crankshaft position sensor. This van has two crankshaft sensors. One under the harmonic balancer and the one behind the engine just above the oil pan. Real hard to get your hands on. You think an auto engineer would know that exhaust manifolds get really hot!