I have 92 Pickup 4x4 Deluxe which has the tach gauge cluster & an oil pressure gauge. According to the manual, there is supposed to be an idiot light for low oil pressure on the far lower left of both the base model & the Deluxe. I pulled the gauge cluster and there is no bulb or writing on the board for any low oil pressure light. Do not see that icon anywhere on the dash along the lower light indicators. I do have a the low pressure switch on the engine to the left of the oil pressure sending unit, so where does this wire go to? I believe the wire sends ground when there is no oil pressure. Thanks

 

Unless the 1989-1995 trucks were different from the previous generation (which I am more familiar with), I am pretty sure you either get the gauge with the DLX/SR5 cluster or you get the light with the standard cluster, but no clusters had both.

 

If you have a tach you have an oil pressure gauge, no idiot light.

Looking at the intake side of the 22re, through the wheel well, to the left of the oil pressure sending unit (and slightly higher) is the factory knock sensor.

 

 

Ok thanks for the info, appears the manual is incorrect and I pulled the cluster out for no reason.

 

Did I screw up the ECU by putting ground on this wire. I did this to see if the idiot light (which now I know I don't have) came on.

 

Assuming it was actually the knock sensor wire you grounded, no damage would be done since the knock sensor output is an AC wave zero volts is an acceptable input for the ECU.

I don't think my 94 has anything in that light position either.

It probably got pruned by cost cutting in the engineering phase. It's actually a very common sort of thing to happen, engineer A designs a system then they hand it off to engineer B who's job is to prune it down to a minimum "it will work 99% of the time"...

 

Is that the owner's manual that would come with these trucks in the glove box? Got my '94 DLX in 2015 and all it had in the glove box was a dead rat haha.

Does your low fuel light work? I swapped a tachometer gauge cluster (and corresponding oil pressure sensor) in my truck a few years ago but my low fuel light has never worked on either cluster.

 

The "low fuel" light was optional I believe. Different fuel senders for "with" and "without" the low fuel light.

The space for the light was included in all gauge clusters so Toyota only needed to make a few variations over several markets.

The Owner's Manual is what would have come in the glove box when new. Not many are still there after all these years.

 

Yes, that is the original glove box manual. Low fuel light does work, if the 3rd contact from the right on terminal D gets ground, the light comes on. Arrow points to the low fuel light bulb. But sounds like not every truck had a low fuel light.

 

Any idea if any of the 4x4 Xtracab pickups came with a low fuel light? I'm assuming my fuel tank's sending unit just doesn't have the circuit provision for triggering the low fuel light, but I'd love to add that function if there's a capable sending unit that would behave properly in the 17 gallon, 4x4, Xtracab-shortbed/regularcab-longbed fuel tank like what my truck's equipped with.