Oil pressure light came on and has stayed on

[WhiteGluestick]

So my oil pressure light has been on for awhile now and I'm just hoping g to find some answers here. So the oil level is slightly above full (from previous owner) and my oil pressure indicator doesn't ever go above the first bar. Could it be a bad pump or could the slightly full oil cuase low oil pressure?

 

[WhiteGluestick]

So my oil pressure light has been on for awhile now and I'm just hoping g to find some answers here. So the oil level is slightly above full (from previous owner) and my oil pressure indicator doesn't ever go above the first bar. Could it be a bad pump or could the slightly full oil cuase low oil pressure?View attachment 3322401

Note: my engine isn't running in the photo.

 

[coldtaco]

Check the wiring for broken or touching where it shouldn’t, find out what triggers that light maybe that’s broken

 

[ToyotaMatt]

How come your oil pressure light has been on for awhile now ,

but it has taken you awhile to post this tech. assist thread here now ?


If my oil pressure light came on like you have going on there I would have reached out here H55F Jack Flash Fast …..


- look at the single yellow wire / black tracer stripe and if you have one ?
Also the white wire w/ black tracer stripe wire to make sure like @coldtaco suggests first above …

If the yellow wire w / black tracer has broken off at the oul
Sender it self like can and does happen on older Toyota,s all the time
It’s frazzled copper strand wire then gets bounced around during all your bumps and stuff down under all over down in OZ …

That grounding out of that wire will and can make the Oil pressure light come on and stay on for longer then awhile because it has short circuited and melted down the guage in dash and fused then light to be ON now forever..

Carefully examine that clip or clips on the oil sender BELL and report back , take photos too Mate and post them here too

Study the tech. Photos in both links below this will help you get to the bottom of the oil pressure light being on for awhile now …


.

OEM Oil Pressure Sending Unit Sensor Rubber Boot / Cover Cap & Sub Harness Engine Room Wire #4 Part # 82124-90A01 Restoration & Repair Kit BJ70 HJ60 BJ60 FJ60 FJ62 BJ42 Fj40 FJ55 - VintageTEqParts.com

OEM Oil Pressure Sending Unit Sensor Rubber Boot & Sub Harness - Part # 82124-90A01- Engine Room Wire #4 Restoration...

vintageteqparts.com

.

( Single Wire Type ) TOYOTA Oil Pressure Sending Unit Sensor Switch Connector Wire Harness Repair Kit - VintageTEqParts.com

TOYOTA Oil Pressure Sending Unit Sensor Switch Connector Wire Harness Repair Kit Fits 1964-1990 FJ40, 55 , 60, 62...

vintageteqparts.com

 

[jblueridge]

The oil pressure switch is different from the oil pressure gauge or its sender.
Supposedly, all the oil gauges read a bit low. As you said, mine also stays below the first bar.
I am 99% sure that your gauge needle would be all the way up or all the way down if the sender and/or its wire were short circuited.
Try to find the oil pressure switch and its wiring. Left side of engine maybe.

 

[WhiteGluestick]

How come your oil pressure light has been on for awhile now ,

but it has taken you awhile to post this tech. assist thread here now ?


If my oil pressure light came on like you have going on there I would have reached out here H55F Jack Flash Fast …..


- look at the single yellow wire / black tracer stripe and if you have one ?
Also the white wire w/ black tracer stripe wire to make sure like @coldtaco suggests first above …

If the yellow wire w / black tracer has broken off at the oul
Sender it self like can and does happen on older Toyota,s all the time
It’s frazzled copper strand wire then gets bounced around during all your bumps and stuff down under all over down in OZ …

That grounding out of that wire will and can make the Oil pressure light come on and stay on for longer then awhile because it has short circuited and melted down the guage in dash and fused then light to be ON now forever..

Carefully examine that clip or clips on the oil sender BELL and report back , take photos too Mate and post them here too

Study the tech. Photos in both links below this will help you get to the bottom of the oil pressure light being on for awhile now …


.

OEM Oil Pressure Sending Unit Sensor Rubber Boot / Cover Cap & Sub Harness Engine Room Wire #4 Part # 82124-90A01 Restoration & Repair Kit BJ70 HJ60 BJ60 FJ60 FJ62 BJ42 Fj40 FJ55 - VintageTEqParts.com

OEM Oil Pressure Sending Unit Sensor Rubber Boot & Sub Harness - Part # 82124-90A01- Engine Room Wire #4 Restoration...

vintageteqparts.com

.

( Single Wire Type ) TOYOTA Oil Pressure Sending Unit Sensor Switch Connector Wire Harness Repair Kit - VintageTEqParts.com

TOYOTA Oil Pressure Sending Unit Sensor Switch Connector Wire Harness Repair Kit Fits 1964-1990 FJ40, 55 , 60, 62...

vintageteqparts.com

I've just done wjat you said and can't find anything out of the usual. None of the wiring seems snapped the circuit behind the gauge looks normal.

 

[WhiteGluestick]

The oil pressure switch is different from the oil pressure gauge or its sender.
Supposedly, all the oil gauges read a bit low. As you said, mine also stays below the first bar.
I am 99% sure that your gauge needle would be all the way up or all the way down if the sender and/or its wire were short circuited.
Try to find the oil pressure switch and its wiring. Left side of engine maybe.

Alright so I disconnected the clip on the oil sensor and the light still came on same with it plugged back in.

 

[jblueridge]

Right, disconnecting the sender would have no effect on that light.
The sender controls the gauge with its needle, the switch is simply connected to the dash light.
The sender is much larger than the switch. the sender is on the right side of the engine on my BJ.
The switch is maybe 25cm in diameter.
If there is wire damage, it is likely in the engine bay.

 

[WhiteGluestick]

Right, disconnecting the sender would have no effect on that light.
The sender controls the gauge with its needle, the switch is simply connected to the dash light.
The sender is much larger than the switch. the sender is on the right side of the engine on my BJ.
The switch is maybe 25cm in diameter.
If there is wire damage, it is likely in the engine bay.

There isn't anything on the left side of the engine as far as I could see. Do you have a description of what the switch would look like? All I could see were these are any the switch you are referring to?

 

[ToyotaMatt]

 

[ToyotaMatt]

i did not mean pull the cluster like that

just the engine bay BELL SENDER wires ..

but GOOD


- i have been asked countless times to Reproduce a oil sender and switch SUB HARNESS by the DIESEL Tech folks here

- NO gasoline Land Cruiser engine i know of has both a mechanical sender BELL and a IDIOT LIGHT SWITCH TOO ?

- but many DIESEL LAND CRUISER ones DO , YES


I have TECH pics ,

- i do not have 100% of all the facts here on what ones do and do not ?

- so , pardon my un-Toyota FSM terminology here also ,

YES i said SENDER AND SWITCH


mr. @jblueridge , would you please fill in the TECH holes on the double oil sender and switch topics and correct any facts i have in error pleas too , thanks


below is GOOD tech ,


also the image of the sensor above GREEN plug ?

is this a OIL SWITCH ? i cant say so ?

here is WHY :

TECH TREAD ON THIS TOPIC HERE ALSO :

ARCHIVE - THe Offical call out # 82124 / 82114-90K08 / ENGINE WIRE No. 4 on a 1989 HJ61LG-MNXW w/ 12H-T OIL Pressure Sending Units SUB. Harness Thread

call out # 82124 82114-90K08 ENGINE WIRE No. 4 on a 1989 HJ61LG-MNXW w/ 12H-T i have been asked to re-produce this mini OIL SENDER Sub. harness it was just hanging there with NO home ? that color code usually falls under the KEY ON Position ? so anything can be at play here

forum.ih8mud.com

 

[WhiteGluestick]

i did not mean pull the cluster like that

just the engine bay BELL SENDER wires ..

but GOOD


- i have been asked countless times to Reproduce a oil sender and switch SUB HARNESS by the DIESEL Tech folks here

- NO gasoline Land Cruiser engine i know of has both a mechanical sender BELL and a IDIOT LIGHT SWITCH TOO ?

- but many DIESEL LAND CRUISER ones DO , YES


I have TECH pics ,

- i do not have 100% of all the facts here on what ones do and do not ?

- so , pardon my un-Toyota FSM terminology here also ,

YES i said SENDER AND SWITCH


mr. @jblueridge , would you please fill in the TECH holes on the double oil sender and switch topics and correct any facts i have in error pleas too , thanks


below is GOOD tech ,


also the image of the sensor above GREEN plug ?

is this a OIL SWITCH ? i cant say so ?

here is WHY :

TECH TREAD ON THIS TOPIC HERE ALSO :

ARCHIVE - THe Offical call out # 82124 / 82114-90K08 / ENGINE WIRE No. 4 on a 1989 HJ61LG-MNXW w/ 12H-T OIL Pressure Sending Units SUB. Harness Thread

call out # 82124 82114-90K08 ENGINE WIRE No. 4 on a 1989 HJ61LG-MNXW w/ 12H-T i have been asked to re-produce this mini OIL SENDER Sub. harness it was just hanging there with NO home ? that color code usually falls under the KEY ON Position ? so anything can be at play here

forum.ih8mud.com

View attachment 3323262

View attachment 3323263

This is the closest thing thing I could find to what you showed me. The lead from the sender intor this "relay" and then a sing wire continues into the wiring harness. I cannot find any switch that connects into the engine like the last picture supplied.

 

[ToyotaMatt]

This is the closest thing thing I could find to what you showed me. The lead from the sender intor this "relay" and then a sing wire continues into the wiring harness. I cannot find any switch that connects into the engine like the last picture supplied.View attachment 3323277

see my pics below

ALL that Corrosion and dirt mud and crap in those connector plugs CAN be your problem ?

CAN ?

clean them up and make good solid electrical BRASS ON BRASS contact here


this a RED FLAG to me ...


Do only 1 Connetor a time

Do NOT pull both off same time

Fyi

The grunge here is NoT Normal

 

[jblueridge]

What engine do you have?
Did I miss that somewhere?

 

[WhiteGluestick]

What engine do you have?
Did I miss that somewhere?

Sorry it's a 1hz I didn't say my bad.

 

[jblueridge]

Can you check Toyodiy website for parts lists and diagrams?

 

[jblueridge]

What year and model cruiser is it?

 

[WhiteGluestick]

What year and model cruiser is it?

1993 HZJ75 troopcarrier

 

[jblueridge]

Toyodiy.com shows that engine should have an oil pressure sender and an oil level sensor.
It also shows that engine does not have and oil pressure switch.

I think you should also post on the Diesel and 24V section and search for the oil level sensor.

 

[jblueridge]

I found a pic of the oil level sensor.
It looks like it has 4 or 5 bolts and a white plastic socket for the wiring to plug into.
Probably bolted on the side of the engine with just the socket sticking out.