Cluster Woes
A couple of things to check for the oil pressure light:
First is to make sure you're using the correct sender-
Sender for warning light:
or 
Sender for gauge:
They are not interchangeable- the gauge sender will not work properly with a light, and vice-versa.
Second is to be sure you did not use any sealer or teflon tape on the threads when you install the sender. This can prevent the sender from grounding properly and not functioning. Check with an ohmmeter from the body of the sender (NOT the connector) to a known good ground on the engine. Reading should be at or near 0 ohms.
A couple of things to check for the oil pressure light:
First is to make sure you're using the correct sender-
Sender for warning light:
Sender for gauge:
They are not interchangeable- the gauge sender will not work properly with a light, and vice-versa.
Second is to be sure you did not use any sealer or teflon tape on the threads when you install the sender. This can prevent the sender from grounding properly and not functioning. Check with an ohmmeter from the body of the sender (NOT the connector) to a known good ground on the engine. Reading should be at or near 0 ohms.
