EB83C10
Junior Member
- Joined
- Jan 26, 2022
- Posts
- 10
- Reaction score
- 10
- Location
- Homeworth, Ohio
- First Name
- Erik
- Truck Year
- 1983
- Truck Model
- C10
- Engine Size
- 383
Looking for some input on my oil pressure gauge. I've found a ton of information on the sight here and used it for trouble shooting. But I still can't get it working.
I have a 83 C10 that I acquired in pieces. Original SM 465 Transmission. Swapped in a crate 383 and all new Painless wiring harness. All new ground wires engine, frame, cab, etc...
Gauge reads Approximately 15 psi at all times when the engine is running.
I originally had the old sending unit installed and I replaced with a new one. Same reading. No thread sealant or tape on threads to interfere with ground signal.
Connector for instrument cluster has been checked and double checked for correct pin out. Factory circuit board traced and everything looks good. Grounds to bus bar clean. All new wiring and connectors. All other gauges and back lights working.
When I unplug the wire at the sender the gauge pegs. Ground it and it drops to zero.
Ceramic resistor on back of gauge reads 85 ohms. I've had trouble finding information about whether this is the correct reading for the oil pressure gauge resistor? If it's not, what is?
I checked the pressure with a mechanical gauge and it reads 50 psi cold and approximately 37 hot with fluctuation when revved.
What's next? Is the gauge itself bad? If so, what's the best place to buy a reliable new one? Or where can I get a good used one?
Attached picture showing gauge with needle where it sits with no change whatsoever with the engine running.
Thanks!
I have a 83 C10 that I acquired in pieces. Original SM 465 Transmission. Swapped in a crate 383 and all new Painless wiring harness. All new ground wires engine, frame, cab, etc...
Gauge reads Approximately 15 psi at all times when the engine is running.
I originally had the old sending unit installed and I replaced with a new one. Same reading. No thread sealant or tape on threads to interfere with ground signal.
Connector for instrument cluster has been checked and double checked for correct pin out. Factory circuit board traced and everything looks good. Grounds to bus bar clean. All new wiring and connectors. All other gauges and back lights working.
When I unplug the wire at the sender the gauge pegs. Ground it and it drops to zero.
Ceramic resistor on back of gauge reads 85 ohms. I've had trouble finding information about whether this is the correct reading for the oil pressure gauge resistor? If it's not, what is?
I checked the pressure with a mechanical gauge and it reads 50 psi cold and approximately 37 hot with fluctuation when revved.
What's next? Is the gauge itself bad? If so, what's the best place to buy a reliable new one? Or where can I get a good used one?
Attached picture showing gauge with needle where it sits with no change whatsoever with the engine running.
Thanks!