Yes the Brake interlock switch I'll bet that is what it is I had this problem on a 1978 Mercury Cougar. What often happens is the switch which is mounted at the top of the brake petal gets loose and out of position so much of the time all that is needed is to reposition it and tighten the bolt down. Below is a picture of what one version of the switch looks like Ford used several but this will give you an idea of what to look for. If the switch is bad Autozone has them for just short of 16 bucks each.
My Carbon foot print is 57 tons per year, and that doesn't count my fart gas.
I spend my carbon offset money on my 1995 F150 Flareside with a carbon spewing 5.0L V8.
Last edited by transmaster; 11-26-2009 at 10:42 AM.