Oil gauge mechanic electric - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**K10-Kansas** · 01-21-2023, 03:56 PM

Hi. I am connecting the new wiring harness and putting in a new gauge cluster and am not sure if I have an oil pressure sending unit that connects to the wiring harness. I see the mechanic pressure line but do I also have an electric sensing unit? If so, I can't find it.

**K10-Kansas** · 01-21-2023, 04:02 PM

I think maybe I don't have electric anyway. Just mechanical. Is an electric sending unit just for idiot lights? I have a pressure line connected to the engine and pressure connection right here on the gauge cluster

72SB · 01-21-2023, 04:10 PM

it would appear you have a mechanical gauge port on gauge cluster (one your finger is on) so run the OP line to that. Oil light would take a specific sender from whatever port you would install that in on the engine. The one you have above oil filter would work assuming you have a oil light in your cluster it would feed

**truckster** · 01-21-2023, 04:12 PM

The 67-72 Chevy and GMC trucks only had either idiot lights or mechanical gauges.

**K10-Kansas** · 01-21-2023, 04:51 PM

Okay so it sounds like since I have an oil guage, there is no use for the oil wire on the new harness right? Thanks for the help on this.

**LockDoc** · 01-21-2023, 06:16 PM

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The oil pressure line on the back of your engine should enter the cab through a rubber bushing in the firewall. The interior end should have a small fitting on it that will screw into the oil gauge port on the back of the cluster, that you have your finger on. Screw it in carefully, it is easy to get it cross threaded. You will need a 5/16" open end wrench for the fitting. You will not need the wire in the new harness.

LockDoc

**K10-Kansas** · 01-21-2023, 06:40 PM

Quote:

Originally Posted by LockDoc

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The oil pressure line on the back of your engine should enter the cab through a rubber bushing in the firewall. The interior end should have a small fitting on it that will screw into the oil gauge port on the back of the cluster, that you have your finger on. Screw it in carefully, it is easy to get it cross threaded. You will need a 5/16" open end wrench for the fitting. You will not need the wire in the new harness.

LockDoc

Perfect, thanks!

01-21-2023, 03:56 PM	#1
K10-Kansas Senior Member Join Date: Nov 2022 Location: Kansas City Posts: 497	Oil gauge mechanic electric Hi. I am connecting the new wiring harness and putting in a new gauge cluster and am not sure if I have an oil pressure sending unit that connects to the wiring harness. I see the mechanic pressure line but do I also have an electric sensing unit? If so, I can't find it. Attached Images __________________ 1971 C10 manual cab. 76 4x4 chassis. Cut short frame. Carbureted Blueprint 350, automatic 700r4. ~ James

01-21-2023, 04:02 PM	#2
K10-Kansas Senior Member Join Date: Nov 2022 Location: Kansas City Posts: 497	Re: Oil gauge mechanic electric I think maybe I don't have electric anyway. Just mechanical. Is an electric sending unit just for idiot lights? I have a pressure line connected to the engine and pressure connection right here on the gauge cluster Attached Images __________________ 1971 C10 manual cab. 76 4x4 chassis. Cut short frame. Carbureted Blueprint 350, automatic 700r4. ~ James

01-21-2023, 04:10 PM	#3
72SB Registered User Join Date: Apr 2022 Location: Moorpark, CA Posts: 774	Re: Oil gauge mechanic electric it would appear you have a mechanical gauge port on gauge cluster (one your finger is on) so run the OP line to that. Oil light would take a specific sender from whatever port you would install that in on the engine. The one you have above oil filter would work assuming you have a oil light in your cluster it would feed

01-21-2023, 04:12 PM	#4
truckster Senior Member Join Date: Jan 2001 Location: Orem, Utah Posts: 7,976	Re: Oil gauge mechanic electric The 67-72 Chevy and GMC trucks only had either idiot lights or mechanical gauges. __________________ I have sworn upon the altar of God, eternal hostility against every form of tyranny over the mind of man. - Thomas Jefferson

01-21-2023, 04:51 PM	#5
K10-Kansas Senior Member Join Date: Nov 2022 Location: Kansas City Posts: 497	Re: Oil gauge mechanic electric Okay so it sounds like since I have an oil guage, there is no use for the oil wire on the new harness right? Thanks for the help on this. __________________ 1971 C10 manual cab. 76 4x4 chassis. Cut short frame. Carbureted Blueprint 350, automatic 700r4. ~ James

01-21-2023, 06:16 PM	#6
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,769	Re: Oil gauge mechanic electric - The oil pressure line on the back of your engine should enter the cab through a rubber bushing in the firewall. The interior end should have a small fitting on it that will screw into the oil gauge port on the back of the cluster, that you have your finger on. Screw it in carefully, it is easy to get it cross threaded. You will need a 5/16" open end wrench for the fitting. You will not need the wire in the new harness. LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -



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