While working to replace (still) the water pump on my truck I found an loose 2 wire plug, wire colors are red/yellow and grey/red Haynes manual indicates is for the power steering pressure switch. I look around the pump assembly but couldn't find a connector and wondering it's location.

 

It should be located on one of the 2 lines for the power steering. I don't know if it's the input or return, though.

 

Went back and checked pressure lines on the truck (see signature), power steering pressure switch not present, wires just hanging unplugged. Now, checking the web found a very old post on this forum (2002) and this is what it says:

Quote

"Last time I posted here I was looking for the right place for some free connectors in my 1993 Bronco.

Today I´ve checked something else and I found a wiring and connector location picture. One of the connectors I found, was the Power Steering pressure switch which is exactly the one which is hanging free around in my Bronco.

But then there was a little discription for the picture on the Power Steering pressure switch:

(5.0L without E4OD only!)

What does it mean?

Is the Power Steering pressure switch only for models with the 5.0L engine and manual transmisson or not?

Could that check someone of you which has the same Bronco like me?(5.0L E4OD 1993 Ford Bronco)

Is that connector hanging free around in the motor room?

End quote.

Now I'm puzzled, does anybody know if my particular truck model (see signature) doesn't use the pressure switch? Last time I did a KOER the code for the power steering never showed. The pressure line has a bolt that could be the port for the switch but I'm not sure. The plug has been hanging unplugged since I bought the truck last year.

Thanks for the information

 

The PSPS mounts in the pressure line near where the rubber hose is crimped to the hard-line at the steering gearbox inlet. The description you found earlier is correct, so since you have the E4OD, you won't have a PSPS. You would get a code for it in the computer if it was looking for one.

 

hiya all

just did a code check and found this exact problem

PSPS open

i have a

1989 f150 5.0L v8 with 5sp manual and 4wd... i am in australia so the right hand drive vehicle.

i went looking for the switch after some research and there is not one in either of the lines, just a group of pressure line clamps.. in saying this, i feel the dodgy ******* that owned this truck before me has simply removed it..

I am chasing idling problems and this could be one of the many causes of the problem

Now if there was not meant to be one would the code reader ignore the code?
Should i put a new one back in?
Can i trick the ecu in thinking the pump is ok? (although i am yet to find the plug either)

About to go looking for a plug similar to the one at the beginning of this thread.. unless anyone has a pic of the 1989 one

Cheers in advance

 

Right, if the computer is meant for a truck without the switch, it won't be looking for it and the code reader would NOT show this code.

So, either the previous owner took the switch out, or he replaced the computer with one from a truck that did have this switch.

As for tricking the ECU... I think you could. You'd only have to momentarily jumper the plug during the self-test when it's looking for it. Why do you want to trick it? To see if it otherwise passes the test?

 

Ideally i would like to bring the truck back to normal.. so replacing the switch sounds like the go. I still cant find the wire anywhere.. still looking.. any tips on where to look? From the picture it is on the right side of the engine (standing from the front).. would it be the same with the australian version?

I have sourced a new hose with the fitting and a new switch.. but really want to find this plug before i order it.

Would it be ok to continue to run without the PSPS?

From my reading, the lack of this switch could cause idle problems due to advancing the timing, but only when the pump is under load.. is this correct?

My theory with tricking the ecu to thinking the pump is fine is to stop this timing change occuring at all.

 

ok.. found the power steering pressure switch wire and it had a plug in it.. is this a dummy plug?

I would send a pic but not enough posts yet..

The plug has 0 Ohms across it.. direct short

Also, just ordered a new hose and switch from america.. and thought about it after i bought it... would it be the same for an Australian truck being that we drive on the wrong side of the road?? It looks like i will need to extend the wire to reach the power steering pump as it is on the opposite side of the truck

 

you would have to extend wires unless you found a right hand drive harness