Dead oil pressure gauge after new sending unit installed. 1986 K10 HELP! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

yellow400ex05 · 05-31-2013, 10:08 PM

alright i bought my 1986 Chevy K10 and the factory oil pressure gauge never worked, and the needle sits past 60psi, as if it were dead. well it had a 2 prong sending unit in it, so i put the CORRECT single prong pressure sensor in the block, and the oil pressure gauge still sits in the same spot maxed out at 60PSI. what else could be wrong with it? i cleaned the plug area up when it was installed. here's what im talking about.

it wont move or operate, its all plugged in correctly.

Gigem · 05-31-2013, 11:27 PM

Got a link or picture of the sender you installed? Might be the one the sends a signal to the fuel injection instead of oil pressure gauge. Was it small and easy to install? If so, probably wrong. I made this mistake on mine...
Posted via Mobile Device

Axle · 06-02-2013, 08:36 PM

Along with the above, the guage sending unit is behind the distributor and is your typical large can sender.

Alex.

**hatzie** · 06-02-2013, 09:12 PM

You may have the wrong sender. You can get senders in various Ω ranges for different gauges.
GM oil pressure senders should be 0Ω=0psi to 90Ω=60psi.

The aftermarket oil pressure gauge on my ATV is backwards 240Ω at 0psi and 33Ω at 40psi.
Ford used several Ω ranges.
VDO likes 10Ω=0psi and 180Ω=150psi.

**hatzie** · 06-03-2013, 04:37 AM

If the gauge wire is open (broken) then the gauge will sit at 3:00 like yours. According to the Schematics the engine compartment oil sender wire could be Tan or Blue.
You can pull the oil pressure gauge without removing the instrument cluster bucket.
Set a meter set to continuity buzzer or one of the Ω scales.
The spring clips form a point down triangle. The point is Ground, IGN is toward Driver door, and Sender is toward passenger door.
Check with the meter leads from the sender connector to sender signal spring clip.

05-31-2013, 10:08 PM	#1
yellow400ex05 Registered User Join Date: Aug 2011 Location: confusion, USA Posts: 206	Dead oil pressure gauge after new sending unit installed. 1986 K10 HELP! alright i bought my 1986 Chevy K10 and the factory oil pressure gauge never worked, and the needle sits past 60psi, as if it were dead. well it had a 2 prong sending unit in it, so i put the CORRECT single prong pressure sensor in the block, and the oil pressure gauge still sits in the same spot maxed out at 60PSI. what else could be wrong with it? i cleaned the plug area up when it was installed. here's what im talking about. it wont move or operate, its all plugged in correctly.

05-31-2013, 11:27 PM	#2
Gigem Registered User Join Date: Feb 2012 Location: Lakeway, TX Posts: 335	Re: Dead oil pressure gauge after new sending unit installed. 1986 K10 HELP! Got a link or picture of the sender you installed? Might be the one the sends a signal to the fuel injection instead of oil pressure gauge. Was it small and easy to install? If so, probably wrong. I made this mistake on mine... Posted via Mobile Device __________________ 1972 GMC Sierra Grande (current truck) 1980 Chevy Stepside (gone) 1987 Chevy Blazer (gone) 1972 Chevelle SS Convertible (gone) 1973 Chevy Corvette (gone) 1967 Chevy Camaro (STOLEN!)

06-02-2013, 08:36 PM	#3
Axle Registered User Join Date: Jul 2011 Location: SW Ontario Posts: 1,214	Re: Dead oil pressure gauge after new sending unit installed. 1986 K10 HELP! Along with the above, the guage sending unit is behind the distributor and is your typical large can sender. Alex.

06-02-2013, 09:12 PM	#4
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 5,014	Re: Dead oil pressure gauge after new sending unit installed. 1986 K10 HELP! You may have the wrong sender. You can get senders in various Ω ranges for different gauges. GM oil pressure senders should be 0Ω=0psi to 90Ω=60psi. The aftermarket oil pressure gauge on my ATV is backwards 240Ω at 0psi and 33Ω at 40psi. Ford used several Ω ranges. VDO likes 10Ω=0psi and 180Ω=150psi. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

06-03-2013, 04:37 AM	#5
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 5,014	Re: Dead oil pressure gauge after new sending unit installed. 1986 K10 HELP! If the gauge wire is open (broken) then the gauge will sit at 3:00 like yours. According to the Schematics the engine compartment oil sender wire could be Tan or Blue. You can pull the oil pressure gauge without removing the instrument cluster bucket. Set a meter set to continuity buzzer or one of the Ω scales. The spring clips form a point down triangle. The point is Ground, IGN is toward Driver door, and Sender is toward passenger door. Check with the meter leads from the sender connector to sender signal spring clip. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.