- Joined
- Apr 14, 2019
- Messages
- 418
- Reaction score
- 218
- Location
- Center Valley , PA18034
- My Car
- 72 Vert 351C White
Hi,
I've been trying to hunt down why my oil pressure idiot light is not working. It may be a bad bulb, but before pulling the cluster I have a question about the Prove Out (PO) circuit.
72 351C Vert with AC (LoL)
a. The oil pressure sensor is ok
b. Connector to oil sensor clean, tight, and wire is ok before it enters the firewall.
c. Temp and Brake warning idiot lights work when the ignition is 'ON'.
From searching past posts, I believe the Prove Out (PO) should also ground the oil temp idiot light to test the bulb however when looking at the 72 wiring diagram I don't see it. I've attached a screen capture of PO (circled in Red) for the BRAKE warning and also the Temp. I also looked at the 71 and 73 diagrams and don't see it either.
Question. Is there a PO ground path oil pressure similar to temp and brake warning lamps. From the schematic? I don't a separate path for the PO. Could the path be tied to the Temp PO circuit?
Thanks
I've been trying to hunt down why my oil pressure idiot light is not working. It may be a bad bulb, but before pulling the cluster I have a question about the Prove Out (PO) circuit.
72 351C Vert with AC (LoL)
a. The oil pressure sensor is ok
b. Connector to oil sensor clean, tight, and wire is ok before it enters the firewall.
c. Temp and Brake warning idiot lights work when the ignition is 'ON'.
From searching past posts, I believe the Prove Out (PO) should also ground the oil temp idiot light to test the bulb however when looking at the 72 wiring diagram I don't see it. I've attached a screen capture of PO (circled in Red) for the BRAKE warning and also the Temp. I also looked at the 71 and 73 diagrams and don't see it either.
Question. Is there a PO ground path oil pressure similar to temp and brake warning lamps. From the schematic? I don't a separate path for the PO. Could the path be tied to the Temp PO circuit?
Thanks
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