I went to replace the front pads on my new 420SEL today and check the OVP. Pads went in fine. I found that the idler arm was bad or loose. The ball joints seem OK even with the split boots. (new boot time).

I checked the OVP and resoldered the circuit board connections because I thought it was bad. Last weekend, I did the old KOEO duty cycle check and it was zero (0). Today I checked further and found that the duty cycle is all over the place when running and zero (0) when key on engine off (KOEO). DVM w/duty cycle between pic 3 and ground of the X11 socket.

I'll search some more. Any thoughts?

__________________
Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.

OK, more. If I read the manual correctly, the zero is actually 100% which comes to no faults found, but the MIL/CEL is on.

__________________
Regards

Warren

Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor

Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL

ENTER > = (HP RPN)

Not part of the in-crowd since 1952.