I tried to locate a wiring diagram for you but couldn't find one with enough detail.
Your problem may lie in the circuit. Either a broken wire, corroded connector or faulty ground.
To trace it down you'll need a diagram and test light/meter. You can purchase a repair manual from Hanes, Chiltons, Mitchell, etc.
They're only about 25 bucks. If you need further assistance, write back and I'll be glad to help.
Thursday, November 18th, 2010 AT 11:50 AM