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Old 02-09-2014
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Join Date: Sep 2013
Location: Hampstead, Maryland
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After market gauge

Hey guys I gotta 2003 ford ranger with a 4.0 SOHC I got some of my other gauges in but my oil and coolant are a pain in the butt. Has anyone ever installed aftermarket oil psi and coolant temp gauges and if so where can I install with out taking OEM senders out?
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Old 02-09-2014
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I haven't, but something to remember is your oil pressure gauge is basically an on-off switch. If it's got above 8psi, it'll read normal. It doesn't fluctuate with pressure changes between idle and highway rpms. You can swap out the sending unit, modify your gauge cluster, and end up with an actually accurate oil pressure gauge.

As for displaying other important numbers, I use a ScanGaugeII. It displays what the PCM sees with many many options. It's what I've used the last 5+ years and still really enjoy the neat little toy.

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Old 02-11-2014
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Join Date: Sep 2013
Location: Hampstead, Maryland
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I have a pillar gauges with new senders. I am looking if anyone has found a port on the block in the cooling or oil psi side both senders I have I cannot t off on the coolant due to it needs to be in the flow not separated and my oil psi needs to stay hooked up and reading for my computer to no throw a code
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Old 02-11-2014
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I do not know the locations of ports on the block, I will need this info sooner than later for my gauge add-on (Note to self… add to list) but I wanted to say is do not use the OEM sending unit wiring for your gauges or the OEM Sending Units.

When I do the same mod, I will pick up the power and the light wiring from the dash area, use LED lighting if possible and while the dash is out and you are wiring the new gauges get some LED replacement lighting for the dash; they make direct replacements.

You’ll need a schematics for your year truck, Ford had a problem with keeping the same wiring every year, must have been buying on sale.
My manuals are packed for my move so I can’t look up the wiring pin location or the color for you but there are guys on this site that have the info.

What manufacturer are you using for the gauges ?

Should be straight forward hookup once you get the location of the sending units and the correct wiring.

Last edited by Scrambler82; 02-11-2014 at 07:04 AM.
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Old 02-14-2014
Join Date: Aug 2008
Location: Taylor, Michigan
Posts: 96
I installed a mechanical oil pressure gauge on my 08 Ranger many years ago. You can "tee" off the sender if you wish and therefore keep it along with the oil pressure guage.

The oil sender is located on the front of the drivers side of the block and you can access it directly through the left front wheel well.
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