Oil pressure gauge and idiot light - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ratman90 · 03-05-2020, 03:08 AM

72 C10 does not have oil pressure gauge hooked up.
Not sure if I can, but would like the mechanical gauge and the light to both work.
Has HEI, and from what I read here, that prohibits the tee connection for the 2 in one.

Can I do the mechanical from the back of intake and the idiot light from over by the old filter on this 350?

Where do I send the wire to from the sensor for the light?

Thanks
Larry

68 P.O.S. · 03-05-2020, 12:13 PM

I don't see why you can't use a tee with HEI. I've used electric oil sending units with HEI (which are pretty large) and have had no problems. I can't help with the light tho.

**TBONE1964** · 03-06-2020, 10:53 AM

You can use both:

Either by the dist or by the oil filter.

The problem is no place for light on full gauge cluster. You could place it where the temp light is in the gauge gauge and change the filter to say oil instead of temp, wire accordingly and it should look factory and work.

ratman90 · 03-06-2020, 02:51 PM

The problem is no place for light on full gauge cluster. You could place it where the temp light is in the gauge gauge and change the filter to say oil instead of temp, wire accordingly and it should look factory and work.

Tbone, could I tap into that temp light and have it light up for both? High temp and low oil pressure?

What activates that temp light now? None of my gauges worked and were not hooked up excpet for speed, so am starting from scratch.

Thanks
Larry

**StingRay** · 03-06-2020, 05:24 PM

Use a tee for the sender and oil line. Get a no gauge under dash harness and pull the wire that would normally run to what is now the empty idiot light in the fuel gauge of a gauge cluster that is a used light in the non gauge cluster. There are empty pin locations in your gauge harness that will accept the no gauge idiot light wire and the trace is on the flex circuit to that location. Do the same with the under hood harness. You can then use that indicator light as a check engine light. I installed the idiot light sender into the other head and tee'd the oil pressure and temp senders to that same light. It is ground activated by either of the two senders. If the light is on I look to the temp and oil pressure gauges for a problem.

03-05-2020, 03:08 AM	#1
ratman90 Registered User Join Date: Jul 2017 Location: Longmont, Colorado Posts: 64	Oil pressure gauge and idiot light 72 C10 does not have oil pressure gauge hooked up. Not sure if I can, but would like the mechanical gauge and the light to both work. Has HEI, and from what I read here, that prohibits the tee connection for the 2 in one. Can I do the mechanical from the back of intake and the idiot light from over by the old filter on this 350? Where do I send the wire to from the sensor for the light? Thanks Larry __________________ 1972 C10 LWB 2WD 307 4 speed Rescued from Field July 2017

03-05-2020, 12:13 PM	#2
68 P.O.S. Registered User Join Date: Jan 2007 Location: Puyallup, WA Posts: 1,661	Re: Oil pressure gauge and idiot light I don't see why you can't use a tee with HEI. I've used electric oil sending units with HEI (which are pretty large) and have had no problems. I can't help with the light tho. __________________ 72 C10 lwb fleetside -stock 350/350 combo

03-06-2020, 10:53 AM	#3
TBONE1964 Cluster King Join Date: Nov 2012 Location: Junction City, OR Posts: 5,263	Re: Oil pressure gauge and idiot light You can use both: Either by the dist or by the oil filter. The problem is no place for light on full gauge cluster. You could place it where the temp light is in the gauge gauge and change the filter to say oil instead of temp, wire accordingly and it should look factory and work. __________________ Contact me on all of your gauge cluster needs. I specialize in restoration, repair and parts sales for 67-72 Chevy and GMC trucks. email me at tbonegarris@yahoo.com I am also a dealer for Counterpart for gauge cluster parts only. Also see my facebook page, CG&C

03-06-2020, 02:51 PM	#4
ratman90 Registered User Join Date: Jul 2017 Location: Longmont, Colorado Posts: 64	Re: Oil pressure gauge and idiot light The problem is no place for light on full gauge cluster. You could place it where the temp light is in the gauge gauge and change the filter to say oil instead of temp, wire accordingly and it should look factory and work. Tbone, could I tap into that temp light and have it light up for both? High temp and low oil pressure? What activates that temp light now? None of my gauges worked and were not hooked up excpet for speed, so am starting from scratch. Thanks Larry __________________ 1972 C10 LWB 2WD 307 4 speed Rescued from Field July 2017

03-06-2020, 05:24 PM	#5
StingRay Senior Member Join Date: Mar 2000 Location: Saskatoon,SK,Canada Posts: 2,476	Re: Oil pressure gauge and idiot light Use a tee for the sender and oil line. Get a no gauge under dash harness and pull the wire that would normally run to what is now the empty idiot light in the fuel gauge of a gauge cluster that is a used light in the non gauge cluster. There are empty pin locations in your gauge harness that will accept the no gauge idiot light wire and the trace is on the flex circuit to that location. Do the same with the under hood harness. You can then use that indicator light as a check engine light. I installed the idiot light sender into the other head and tee'd the oil pressure and temp senders to that same light. It is ground activated by either of the two senders. If the light is on I look to the temp and oil pressure gauges for a problem. __________________ Saskatoon, Saskatchewan Canada



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