For the Series II its 2 separate wires that go 2 the PCM. Each one give individual info to the PCM. You can disconnect one and be OK-disconnect both while having problems and you'll have more problems. I've tried it all with these little bastards
. Trying to pull a new P/B with a spun bearing is next to impossible-damn Knock sensors-who needs them anyways.
I'm almost positive the Series I can be setup the same way-you just need have it proggrammed into the PCM and know where the wire goes (PIN).
But both into the same feed/PIN will cause some problems-just my .02
I do believe my '87 LeSabre has 2 knock sensors-similar location as the series II-IIRC.