Hi all question for u a 2004 ranger 4.0l inertia switch does It have two or three wires mine has to wires but the end has three connections. ?????? There is a short in my shutoff with code p0025 says it's open helpppppp
thanks

 

Try a google search on 2004 Ford Ranger Inertia Switch. There are you tube videos on how to test the switch. The basic concept is that 12V comes into the switch and continues through the switch as long as the ball is in the down position. After an event of some type the ball pops up and opens the circuit. It is reset by pushing the ball back down. To test it's operation, refer to the you tube video..

 

The inertia switch installation on an 04 with the 4.0 uses two wires (confirmed via schematic).

 

Thanks for the help

 

The P0025 code is for cylinder bank-2 Exhaust camshaft sensor over-retarded .

I agree, the 04 schematic shows two wires to the in cabin inertia switch. The Dark Green / Yel Stripe wire is B+ from the fuel pump power relay in the under hood power distribution box. The Pink / Black stripe wire goes to the fuel pump motor in the fuel tank.

I'm not clear on your problem, you say that you have a "Short in my shutoff, with code P0025 says its open" The generic code P0025 is for the cylinder bank-2 exhaust cam sensor reporting the exhaust cam on that cyl bank is over retarded.
A short in an electrical circuit is the opposite of a open circuit, so we need some clarification of your definitions of the problems. After re-reading your post, I think maybe your saying you have 2 problems, a short in the fuel pump feed to the inertia switch, along with a generic P0025 trouble code, is that right??? More thoughts for consideration.

 

I actually have both a retared cam and an open switch ....boiled the switch down to the wire pigtail..and for the cam I haven't look at the issue .between work and bad weather here in maine with no garage it's not often to get a chance to work on them

 

Ok, good feedback & thanks for the clarification & good to hear you've apparently tracked down the inertia switch circuit short & put it right & await better weather to work the cyl bank 2 cam sensor anomaly, so keep us posted on what you find there, as this is the first time I remember hearing of that code on this board, so will be interesting & informative to hear what the root cause is found to be.

 

Did a test with a test light on my switch I connected to the positive terminal to the pink and blk to the pump the light from the tester came on and then to the drk gen and yellow and nothing ..ot sure if I did it correctly.....any one ?

 

Don't forget when we turn the ignition switch from Off to Run, the computer only has the fuel pump power relay supply power to the pump a couple of seconds to prime/pressurize the system for a start, then it turns power to the pump Off, until we crank the engine & the ECM sees a crankshaft PID signal that says the engine is turning over, then it'll reactivate the fuel pump power relay to close its contacts to repower the pump.

Both leads at the inertia switch are B+, so one of your test lamp leads needs to be on a good clean, unpainted Ground connection for the lamp to work right.

If you aren't getting contact through the inertia switch on the output side to the fuel pump, try Thumping the inertia switch to activate it ( the little red post atop the switch will pop up) so push it down to reset its internal contacts in a new position & recycle the ignition switch to see if your getting power through the inertia switch.

There was a inertia switch problem in I believe the mid to late 90's on Rangers, but can't remember the exact year range, but it wasn't up in your 04 year range as I recall. Still that doesn't mean you couldn't have a problem though, so try the reset thump & see how it goes. If that does fix the problem, I'd look to replace the inertia switch, as it indicates you may have a contact corrosion problem internally. If you listen closely when turning the ignition to Run, before cranking the engine, you might be able to hear if the fuel pump runs a couple of seconds, times out & turns off.

Some thoughts for consideration, let us know what you find.

 

Yup, had an intermittent issue with my Inertia switch in my 94. Had to thump it and reset it a couple of times to clear any potential crud. Though I should replace it, so far so good.