These could be two separate problems but start by checking the wires between the door hinges. A broken wire can stop a window from working. If the radio power wire is connected to the power window circuit, a frayed wire could be touching another wire and affecting what ever else it tied to it.
When the problem is occurring, measure the battery voltage with the engine running at idle. It must be between 13.75 and 14.75 volts. If it's low but comes up when you raise engine speed, suspect a defective diode in the generator. A professional load test will verify that. The generator could also be quitting intermittently. In that case you'll find battery voltage near 12.6 volts with the engine running.
Thursday, June 28th, 2012 AT 6:39 PM