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> Gauge problem..., Oil pressure gauge skyrockets...
BMXerror
post Sep 30 2007, 12:04 AM
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Okay, my new oil pressure gauge that I just wired up does something weird. When I turn ignition on it shoots all the way past the max reading (80 PSI). I can unplug the sensor wire from either the gauge or sensor side and the gauge stays pegged. If I unplug the ground on the gauge it drops to zero, and doesn't do anything when the engine's turned on (sensor plugged in). You would think it's hard to screw up such simple wiring, but I seem to have managed.
VDO gauge experts, the power lead comes from the fuse terminal to the + terminal on the gauge. The sensor wire is plugged into the 'S' terminal on the gauge. The ground is plugged in on the bottom terminal, which I'm assuming is the ground. That's what the diagram says, anyways. I'm using 16 gauge wire all around. (IMG:style_emoticons/default/WTF.gif) (IMG:style_emoticons/default/confused24.gif) Any help?
Mark D.
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BMartin914
post Oct 3 2007, 09:08 PM
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Okay...so you've got the 2-pole sender. It needs to be grounded to work or the gauge will do what yours is doing and peg as soon as it is powered. Either ground the case of the sender to the engine, etc. with a separate lead, or trim your tin to accommodate it. If the sender is screwed intp the engine, it is already grounded.

You can also get a hose to locate it remotely.
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