During the H.O. swap it appears the oil pressure sending unit wire has disappeared. I can't seem to find it anywhere and my message center is going crazy saying i have no oil pressure. I feel like i'm going nuts trying to find it, it may have broken off without me realizing it. It's the oil pressure sending unit on the front of the engine. Does anyone have pictures or know where it comes out of the firewall / goes to? I'm at my wits end trying to find it. BTW the H.O. swap went amazingly its so much quicker now.
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Dunno if the LTC is the same, but on MGM / CV it says to be a white & red wire. Connector C219 is located on top of the left fender.Attached Files -
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been a while since I really looked but I'm thinking its in the harness with the alternator wiring for some reason. If not its in the chunk of harness that wraps around the front of the engine and runs back to the low oil level float.
If its saying you have no oil pressure, the wire is grounded so either you have the wrong pressure sending unit installed, or the wire is pinched someplace. The actual sending unit lives just above the oil filter, kind of tucked into a recess in the block. the correct one is the small one for a switch, if you have the large bell shaped one with the extension pipe, thats the unit for a real gauge and it won't play nice with the idiot lights or digital dash.86 Lincoln Town Car (Galactica).
5.0 HO, CompCams XE258,Scorpion 1.72 roller rockers, 3.55 K code rear, tow package, BHPerformance ported E7 heads, Tmoss Explorer intake, 65mm throttle body, Hedman 1 5/8" headers, 2.5" dual exhaust, ASP underdrive pulley
91 Lincoln Mark VII LSC grandpa spec white and cranberry
1984 Lincoln Continental TurboDiesel - rolls coal
Originally posted by phayzer5
I drive a Lincoln. I can't be bothered to shift like the peasants and rabble rousers
Everything looks like voodoo if you don't understand how it worksComment
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+1 just find the sender above the filter in the side of the block behind the alternator bracket (AC bracket if using fox body accessories - driver side of the engine). Should be a one wire connector. Follow the wire from there and see if it's damaged somewhere.
Only two things are infinite, the universe and human stupidity, and I'm not sure about the former. -- Albert Einstein
rides: 93 Crown Vic LX (The Red Velvet Cake), 2000 Crown Vic base model (Sandy), 2003 Expedition (the vacation beast)
Originally posted by gadget73
... and it should all work like magic and unicorns and stuff.
Originally posted by dmccaig
Overhead, some poor bastards are flying in airplanes.Comment
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Thanks for your input gents. Unfortunately the wire is just nowhere in sight from the bottom of the engine. That's why I need to trace it from the firewall forwardComment
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This is a 1990 harness. There is a short wiring harness for the alternator. On the fender side it has a pink and white wire separate from the main harness, that wire is connected by a grey plug. The other end comes out by the alternator plugs. You won't see the pinkwire because it has a black plastic sheathing on it. The plug is a 90 degree female that slips onto the male prong on the oil pressure sender. WagonMan
Last edited by WagonMan; 07-08-2025, 12:09 PM.89 Colony Park
90 Colony Park
70 HEMI Daytona ConvertibleComment
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