Digital oil pressure idiot light

Ed McLawhorn Jr. · 04-03-2021, 09:01 PM

Installed new digital oil pressure gauge. Had idiot light on live guage to signal if lost oil pressure. I had a second oil sensor wired with a light. Any good way to wire light for digital guage?

Eman · 04-03-2021, 11:13 PM

I don't see what the difference would be if it's a digital gauge, just put a second sensor and a light.

SGSST109E · 04-04-2021, 06:42 AM

Correct

Ed McLawhorn Jr. · 04-04-2021, 08:40 AM

The old gauge was a live gauge and I had brass fittings under dash with second sensor screwed in with light. For led digital, where the second sensor going and how it's going to detect lack of oil pressure? I was thinking about spicing into 12v source to sensor in block and adding light?

L.Fite · 04-04-2021, 12:35 PM

Depends I guess on what motor...
BB Chevy has multiple places to access oil galleys.
Don't know about other brands, but guys here would know about Ford, Chrysler, etc.
Wiring to sensor won't work, gauge uses resistance, light uses dry contact closure.

GTX JOHN · 04-04-2021, 01:27 PM

On my old Mopars = I just put a "T" in the Oil Pressure
orifice and I used to mount a Oil Pressure sender from
an 60's mopar with an idiot light in the extra hole =
Hook that to an additional external light. When the
pressure dropped to below about 12-15 Lbs it would
ground and the light would go on. and I knew it would be time to
look for a Mop!

Ed McLawhorn Jr. · 04-04-2021, 09:33 PM

Thanks guys.

04-03-2021, 09:01 PM	#1
Ed McLawhorn Jr. Member Join Date: Nov 2008 Posts: 306 Likes: 3 Liked 19 Times in 17 Posts	Digital oil pressure idiot light Installed new digital oil pressure gauge. Had idiot light on live guage to signal if lost oil pressure. I had a second oil sensor wired with a light. Any good way to wire light for digital guage?

04-03-2021, 11:13 PM	#2
Eman Member Join Date: May 2014 Location: E TN Posts: 473 Likes: 16 Liked 133 Times in 76 Posts	Re: Digital oil pressure idiot light I don't see what the difference would be if it's a digital gauge, just put a second sensor and a light.

04-04-2021, 06:42 AM	#3
SGSST109E Member Join Date: Jun 2007 Location: NJ Posts: 351 Likes: 62 Liked 126 Times in 61 Posts	Re: Digital oil pressure idiot light Correct

04-04-2021, 08:40 AM	#4
Ed McLawhorn Jr. Member Join Date: Nov 2008 Posts: 306 Likes: 3 Liked 19 Times in 17 Posts	Re: Digital oil pressure idiot light The old gauge was a live gauge and I had brass fittings under dash with second sensor screwed in with light. For led digital, where the second sensor going and how it's going to detect lack of oil pressure? I was thinking about spicing into 12v source to sensor in block and adding light?

04-04-2021, 12:35 PM	#5
L.Fite Senior Member Join Date: May 2020 Posts: 517 Likes: 555 Liked 497 Times in 243 Posts	Re: Digital oil pressure idiot light Depends I guess on what motor... BB Chevy has multiple places to access oil galleys. Don't know about other brands, but guys here would know about Ford, Chrysler, etc. Wiring to sensor won't work, gauge uses resistance, light uses dry contact closure.

04-04-2021, 01:27 PM	#6
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,736 Likes: 2,808 Liked 2,487 Times in 698 Posts	Re: Digital oil pressure idiot light On my old Mopars = I just put a "T" in the Oil Pressure orifice and I used to mount a Oil Pressure sender from an 60's mopar with an idiot light in the extra hole = Hook that to an additional external light. When the pressure dropped to below about 12-15 Lbs it would ground and the light would go on. and I knew it would be time to look for a Mop! __________________ John Irving 741 Stock 741 Super Stock

04-04-2021, 09:33 PM	#7
Ed McLawhorn Jr. Member Join Date: Nov 2008 Posts: 306 Likes: 3 Liked 19 Times in 17 Posts	Re: Digital oil pressure idiot light Thanks guys.