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#4125598 - 10/25/21 01:32 AM Oil pressure gauge install. (With pictures!)
TheCableGuy Offline
Over the Hill

Registered: 04/08/19
Posts: 1056
Loc: Far Northwest AZ
Been meaning to post a little info on here since I did this install a week or so ago so here is it.

Bought GlowShift 7 color oil pressure gauge kit. It came with the bare minimum, a small power harness(that’s only 2 feet), but came with a decent amount of sensor harness length, the sensor itself, and a few other nick nacks.

I bought a 1/4 to 1/8 NPT adapter from Ebay for 10 bucks. Not sure the material it is, seems like a strong plastic?
Then I also bought the sensor relocation hose from glowshift itself, included the line, and 2 fittings.

So I read allot on here about some using a T fitting, for they can keep their dummy light active, but I wanted this to be as simple as possible. With the help of my friend at Ford, who let me borrow his lift; I removed the original sensor.



Nearly impossible to see but you get the idea. Throw on the 1/4 to 1/8 adapter(use plumbers tape!), then the fittings that connect to the relocation hose and moved that up under the air box onto the fender area.

The original sensor: it’s a single wire. I confirmed thst leaving this unplugged throws the “low oil light” on the dash. I simply added an eye-let to this single wire, and grounded it at a power steering pump bolt, really simple here. This got rid of the oil light, and I didn’t have to make a straight splice extension to the wire either. Win win.

Back to the new sensor. Pretty self explanatory.


But here is what I had.

Alright now to all the info everyone wants. Running wires into the cabin!

So there is actually a 1 inch grommet, near the brake booster, that’s super easy to get too. I simply removed it, took a razor to it, ran my harness through that, reinstall the grommet and siliconed the area up. I sadly don’t have a picture of this.

Gauge placement:

So this was a trial and error for me. Some people get the pillar pods, but having spotlights, make that impossible to my understanding. So a clean, pillar mount was off the table. Then I was thinking on the steering column. This also, was not a good choice, as it covered engine temp, and a little of the fuel level area up a bit, as in, I still want to see those easily.

I ended up with this:



I removed the weather strip, and ran my sensor and power wires in this area. Yes, you can still see some of the wiring in the far corner, but it’s not bugging me the slightest. Only noticeable if you look for it. Doubled sided tape, which so far seems to be holding up just fine.

Power wires:

Original harness comes with 2 feet of 22awg wiring. I just straight spliced this and made extensions out to 5 feet instead.

So the gauge requires the following: constant hot, ignition switched hot, ground, and dimmer? Don’t know the name of this but it dims the gauge 30% when you flip your lights on. There is a few option here, and I went with the easiest of them all. The pedal adjuster switch! Removing the trim here is simple, and plenty of room to work with. I have a volt meter and traced down each wire I needed and just tied into the correct ones. You could probably get away with finding the radio wiring, but again, I didn’t want to tear up this dash.

Hiding the wires was easy, and I made sure there was a decent amount of slack left in the event of future gauges, or repair work down the road. I tested the gauge before buttoning up everything. Turning on the lights, and it dims! Turns on when you start it, and obviously off when you turn the car off. Pretty simple.

There is 7 colors to choose from, along with the option that it will just cycle through them all automatically. I found that last function nice during the day, however at night some colors are hard on my eyes. So now, I leave it at red.

Results:

Cold start, in park, is at 65psi
Warm in park, 24psi
Warm idle in gear, 13psi.
5w-20 synthetic blend Motorcraft.

Now for people that don’t have the P7B/P71 package, I’m sure it’s easier for mounting the sensor and such judging by what I have read, so this may or may not apply to some. Anyway there is it. I’m hoping eventually I can get a water temp gauge, I think that would be a nice additional as well.
_________________________
2010 P7B 150K. 11K hours. 3.27, RKE, Cruise, Ported stock plenum, JMod, ADTR sway bar, KYB rear shocks. DIY Headlight harness upgrade, with projector retrofit: Mini H1’s.

Previous rides:
2011 Sierra 1500 155K, too many mods to list. (RIP 01-05-2019)
2001 Durango R/T 5.9. 230K. SOLD 5-1-19

They laugh at me because I’m different. I laugh at them because they’re all the same- Heath Ledger


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#4125600 - 10/25/21 02:51 AM Re: Oil pressure gauge install. (With pictures!) [Re: TheCableGuy]
dixiebandit69 Offline
5.4 Club
Member

Registered: 01/17/12
Posts: 343
Loc: Texas
Good installation!

Pro tip: Use 5w30, not 5w20.
It's better for your engine. Ford designed these engines to run on 5w30; the only reason why they changed the rating was for mileage concerns, NOT engine longevity.
_________________________
2007 Grand Marquis LS: 5.4 swap, 9.9:1 compression ratio, Comp XE268s, NPI pistons, PI heads ported by me, Accufab upper plenum, 75mm DBW throttle body, Factory PI intake with Chinese spacers, CVPI dual exhaust, CVPI torque converter, CVPI air-box and zip tube, J-Mod, 3.55 gears, FMS Trac-Loc differential
17" Dorman CVPI steelies, BFG Comp T/A 255/45 R17s

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#4125718 - 10/25/21 12:44 PM Re: Oil pressure gauge install. (With pictures!) [Re: dixiebandit69]
2004_p71 Offline

no replacement for displacement
Posting Addict

Registered: 09/04/03
Posts: 15830
Loc: Quebec Canada
Originally Posted By dixiebandit69
Good installation!

Pro tip: Use 5w30, not 5w20.
It's better for your engine. Ford designed these engines to run on 5w30; the only reason why they changed the rating was for mileage concerns, NOT engine longevity.


I second that on the 5w30 vs 5w20

to the OP , thanks for sharing .
_________________________

Best time 13.079 @ 105 1.8 60'
comming back this fall

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#4125734 - 10/25/21 02:37 PM Re: Oil pressure gauge install. (With pictures!) [Re: TheCableGuy]
TheCableGuy Offline
Over the Hill

Registered: 04/08/19
Posts: 1056
Loc: Far Northwest AZ
Thank you for the info on 5w-30. Did not know that one bit. I change my oil every 5K, or every 3 months, whichever comes first. Next change I’ll use the 30. I’m not picky on oils.

Hopefully none of this starts a debate.
_________________________
2010 P7B 150K. 11K hours. 3.27, RKE, Cruise, Ported stock plenum, JMod, ADTR sway bar, KYB rear shocks. DIY Headlight harness upgrade, with projector retrofit: Mini H1’s.

Previous rides:
2011 Sierra 1500 155K, too many mods to list. (RIP 01-05-2019)
2001 Durango R/T 5.9. 230K. SOLD 5-1-19

They laugh at me because I’m different. I laugh at them because they’re all the same- Heath Ledger


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#4125738 - 10/25/21 03:22 PM Re: Oil pressure gauge install. (With pictures!) [Re: TheCableGuy]
RF_Overlord Offline

Poobah

Registered: 12/14/02
Posts: 7769
Loc: MA
If you want more info on the 'thick vs. thin" oil debate, go to BITOG (Bob Is The Oil Guy).

Disclaimer: No, I am not that Bob, although I do post there.
_________________________
'03 Mercury Marauder (The Blackbird)
Trilogy Motorsports supercharged #61
Too many mods to list / Driveway Queen

'04 Grand Marquis LS Limited Edition (Spruce Green)
Daily Driver (Thanks, Adam!)

'00 Grand Marquis GS (Silver)
Rotted frame and broken transmission crossmember
Being resurrected...slowly.

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#4125818 - 10/26/21 07:11 AM Re: Oil pressure gauge install. (With pictures!) [Re: TheCableGuy]
Prospect62 Offline
CVN 10 Year
Member

Registered: 01/15/10
Posts: 268
Loc: Central New York
Nice work, very similar to how I did mine a few years ago. I like that gauge!
_________________________
2003 Marauder 300A

2008 CVPI
Nevada Highway Patrol Unit 08-271 (SOLD)
TR3650 5-speed swapped, ADTR Ported Plenum, 618Jerrys ported & polished TB,
4.10's w/Trac-Lok, 21mm Rear Sway Bar, Thrush Welded Mufflers, Marty Ochs/SCT Tune

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#4125930 - 10/26/21 05:01 PM Re: Oil pressure gauge install. (With pictures!) [Re: TheCableGuy]
dixiebandit69 Offline
5.4 Club
Member

Registered: 01/17/12
Posts: 343
Loc: Texas
Originally Posted By TheCableGuy
l]
So this was a trial and error for me. Some people get the pillar pods, but having spotlights, make that impossible to my understanding. So a clean, pillar mount was off the table. Then I was thinking on the steering column. This also, was not a good choice, as it covered engine temp, and a little of the fuel level area up a bit, as in, I still want to see those easily.


While you're replacing gauges, add a real coolant temp gauge.
You're factory "gauge" is nothing more than an analog idiot light.
It goes to that same spot on the gauge once the engine reaches about 170 degrees, then doesn't move until it gets to about 235.
Basically, it doesn't tell you that the engine is overheating until it's almost too late.

I have not trusted factory gauges in vehicles for a LONG time.
_________________________
2007 Grand Marquis LS: 5.4 swap, 9.9:1 compression ratio, Comp XE268s, NPI pistons, PI heads ported by me, Accufab upper plenum, 75mm DBW throttle body, Factory PI intake with Chinese spacers, CVPI dual exhaust, CVPI torque converter, CVPI air-box and zip tube, J-Mod, 3.55 gears, FMS Trac-Loc differential
17" Dorman CVPI steelies, BFG Comp T/A 255/45 R17s

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#4125934 - 10/26/21 05:16 PM Re: Oil pressure gauge install. (With pictures!) [Re: TheCableGuy]
RF_Overlord Offline

Poobah

Registered: 12/14/02
Posts: 7769
Loc: MA
I can kinda see Ford's point in their gauge strategy. People today don't want to know anything about how cars work...they just want to be told:

A. Everything's fine.
B. There's a problem. Take it to the dealer.
_________________________
'03 Mercury Marauder (The Blackbird)
Trilogy Motorsports supercharged #61
Too many mods to list / Driveway Queen

'04 Grand Marquis LS Limited Edition (Spruce Green)
Daily Driver (Thanks, Adam!)

'00 Grand Marquis GS (Silver)
Rotted frame and broken transmission crossmember
Being resurrected...slowly.

Top
#4125960 - 10/26/21 06:25 PM Re: Oil pressure gauge install. (With pictures!) [Re: TheCableGuy]
ironmarinebill64 Offline
Rookie

Registered: 01/30/21
Posts: 67
Loc: New York, USA
My compliments on the clever use of the braided line and grounding out the factory wire.

I didn't think of that when I recently installed my set up. Now I have this tightly jammed elbow with a VDO sender that makes changing the oil filter that much more difficult.

(And now know what I'm gonna play around with next weekend).
_________________________
2005 Lincoln Town Car Signature Limited
5.4 liter throttle body; PI oil cooler, intake tube & air box; Mark VIII aluminum driveshaft; Trac-Lok limited slip; Richmond Gear axle shafts; J-Mod with Sonnax valves; Limo rear control arms and a great sounding stereo that won't ever automatically remember my Bluetooth settings

1999 Mercury Grand Marquis (gave that to youngest son, and he's now a converted true believer)

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#4125970 - 10/26/21 07:15 PM Re: Oil pressure gauge install. (With pictures!) [Re: TheCableGuy]
TheCableGuy Offline
Over the Hill

Registered: 04/08/19
Posts: 1056
Loc: Far Northwest AZ
Yeah water temp gauge will be the next item on the list.

Thinking about getting one of those coolant hose couplers that glowshift sells. Just gotta find the right size. Then I have to figure which coolant line to chop up for the coupler.
_________________________
2010 P7B 150K. 11K hours. 3.27, RKE, Cruise, Ported stock plenum, JMod, ADTR sway bar, KYB rear shocks. DIY Headlight harness upgrade, with projector retrofit: Mini H1’s.

Previous rides:
2011 Sierra 1500 155K, too many mods to list. (RIP 01-05-2019)
2001 Durango R/T 5.9. 230K. SOLD 5-1-19

They laugh at me because I’m different. I laugh at them because they’re all the same- Heath Ledger


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#4125982 - 10/26/21 08:27 PM Re: Oil pressure gauge install. (With pictures!) [Re: TheCableGuy]
RF_Overlord Offline

Poobah

Registered: 12/14/02
Posts: 7769
Loc: MA
Originally Posted By TheCableGuy
I have to figure which coolant line to chop up for the coupler.
The upper hose is the outlet from the engine to the radiator so it will have the hottest water.
_________________________
'03 Mercury Marauder (The Blackbird)
Trilogy Motorsports supercharged #61
Too many mods to list / Driveway Queen

'04 Grand Marquis LS Limited Edition (Spruce Green)
Daily Driver (Thanks, Adam!)

'00 Grand Marquis GS (Silver)
Rotted frame and broken transmission crossmember
Being resurrected...slowly.

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