Question about 1986 Oldsmobile Cutlass Supreme

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I can't find where the temperature switch sending unit go on 86 cutlass?

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Its on top by termostat housing, in front where water hose connect to engine should be sensor pluged in

Posted on May 18, 2009

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Where is the temperature sending unit located on an 1986 oldsmobile cutlass supreme


Both sensors-switches should be on the intake manifold near the thermostat housing.
One is for the computer and the other is for the light on the dash.

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I have 86 celibrity, electric fan will not work. if i take test light and check where the relay switch is, red wire hot and light comes on, if i turn on ing. switch and take test light to green wire (2nd...


What your doing when you touch the test light to that 3rd wire is actually closing the circuit and powering the fan, like the temperature controlled switch should be doing once the engine warms. That sending unit would be screwed into the cooling system where the water can touch it and most likely is in the radiator lower tank or bottom of radiator side tank. Find that sensor and test the wires for power when engine is hot and fan should be on. You could put a toggle switch on it to activate the fan until you get the proper sending unit/sensor.

Jul 11, 2017 | 1986 Chevrolet Celebrity

1 Answer

86 cutlass supreme


Possibly the nuetral safety switch for the transmission. Try putting the car in nuetral and see if it will start.

Oct 13, 2009 | 1986 Oldsmobile Cutlass Supreme

2 Answers

Temperature gauge


For electrically operated temp gauge, check the power supplying it. Most often, this is connected
to either the accessory fuse or front dashboard
instrument panel, check for busted fuse at the
fusebox. If every fuse is okey, then your temp
gauge needs replacement.

Sep 22, 2009 | 1994 Oldsmobile Cutlass Ciera

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How to replace gas sending unit on 99 olds cutlass


First disconnect and remove the battery.
Then, remove gas cap to release pressure. Than remove fuel lines and drain gas into suitable container. Next, loosen the bolts (you can use a tranny jack or have someone else help hold tank and lower it down.
Now you will want to use a BRASS punch. (do NOT use metal or it will cause a spark)
Use brass punch and hammer and loosen nut on tank counter-clockwise to loosen sending unit.
Once nut is loose, pull out sending unit and unplug the wire harness.

Reverse procedure to reinstall

May 23, 2009 | 1999 Oldsmobile Cutlass

1 Answer

93 olds cutlass . oil pressure gauge when started car todaygauge did not moveoil level fineruns perfectguage just at low end of guage


2 things come to mind check the negative terminal of battery and the ground wire connected to engine location varies where they connect these but will always originate from neg on battery a quick check to see if you have a proper ground connection is to take one booster cable and connect to neg post on battery and connect the other end to the engine on clean metal (be sure to keep clear of moving parts ) start engine and see if you have pressure on gage if so you must clean ground connection to engine .if this does not correct possible bad sending unit in side of block with one wire connected to it . caution ** temperature sending unit look similar so make sure with one you are taking out

Nov 21, 2008 | 1993 Oldsmobile Cutlass Supreme

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