Motor Will Run At One Speed, But Not Both
WARNING: This page is about a different car, the 1994 Plymouth Sundance and 1994 Dodge Shadow. However, it is still accessible from the selected car via links, so may be relevant.
If motor will not run on high speed, set switch in HIGH position and connect test light between motor terminal No. 4 and ground. See Figure . If motor will not run on low speed, set switch in LOW position and connect test light between motor terminal No. 3 and ground. If test light does not glow, an open exists in switch or wiring. If test light glows, replace motor.