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Old 01-25-2002, 08:02 PM
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Maverick Maverick is offline
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Join Date: Nov 2001
Posts: 43

Thanks for the quick reply!

A couple other things to note:

1) If I disconnect the single wire from the sending unit on the manifold, the OPS is still inoperative, both the old one and the brand new one from MB.

2) I learned on diesel discussion forum that once the pressure sending unit on the manifold detects about 1-1.1 bars it creates a ground circuit and switches the OPS. What has me puzzled is that disconnecting the sender should cut that ground and the OPS should work fine…but it doesn’t.

Any thoughts?

'91 350SDL 165K miles
Lovin' her until she blows...
'01 Dodge Ram Cummins 4X4 DWR
Stump pullin' beast...
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