[moneymanager]

I saved the following note by Walt Fricke some time ago... it may be useful.
"Oil pressure & level gauges not working. These gauges are configured so that infinite resistance in the sender pegs the gauge. That's how you know the wire has come off the sender - turn on the key and the gauge immediately pegs. Zero resistance (grounding) is apt to produce no movement, at least not more than happens when you turn on the key and the instrument gets its 12 or so volts.
Since yours don't move, you probably don't have an "open" in the system. But you can use this feature to do some checking: Remove the wire at the sender and see if the gauge pegs. If it does, then maybe the sender is bad. Luckily they aren't that expensive (standard VDO parts)... If it doesn't, I'd then pull the sender wire off the gauge (the one which doesn't have 12V when you turn the key). If the gauge doesn't peg, I'd start suspecting the gauge. If the gauge pegs, at that point I'd be looking for a ground in the sender wire somewhere between gauge and sensor...
Oil pressure & level gauges not working.