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[redshift]

Thanks again everyone.



I certain the sound I hear when the problem occurs and when it resolves is the sound of a relay under the hood. With the BIM and the chassis fuse box next to each other I can't isolate it further. I'm beginning to suspect it might be a relay in the chassis box. At one point I measure 12+volts on the cable that enters the fuse box. I'll check the Ford manual to see if there is a relay controlling DC to the dash/ignition.