What are your thoughts on this? Evidently I shold have sent the diagram to begin with. The one under the hood near the master cylinder will alsoi require the owners manual. Plus in the circuit is a inertia fuel shut off swith , this is incase of a wreck. Go to the dealer service dept, and ask them to photocopy the diagram out of their wiring diagram book. If you notice there is also a fuel pump relay there as well that you might want to check. As a result of this I cannot get the vehicle out of gear as this runs on the same circuit. I also replaced the brake light switch at the pedal.
Read the Owners Manual circuit protection descriptions thoroughly. Relay is good swapped it out with another just for fun. There is a diode in the pcm in line with the 12 volt signal as you see. I had to use a chilto … ns manual. And it leaves it to just an experieince or tryit and see what happens.
Crank sensor will have to wait. It is much smaller, irregular shaped, and tucked further back in, the cover is black, use a flashlight and you will see the markings depicting fuses. It's difficult to read and looks like a grid that has nothing to do with fuses to the layman. Roy In my very first reply I said to check fuse r in underhood fuse box as that sendspower to pcm relay not fuse 20 inside car. That is located behind the trim panel by the drivers left foot.
Autozone also has the fuse diagrams online. I noticed a connector that was unplugged into the abs box and possibly grounding out. I plugged it back in and checked the the fuse and everything worked with no 7 fuse blowing. So long as the module mounted on the cruise control does not effect starting in any way, I have to take that as my answer as to wheather or not it can be tested. If the diode is bad you'l get no power. Checked cam shaft positioning sensor. How do I test that module.
It's under the air intakenear the power distribution box. Still think y ou ought to go to crank sensor or connetion problem even on cam sensor. Look at the diagram I sent you. I thought I had it licked this weekend. You can use the tps sensor as it is easy to get to.
I'll check crank sensor, but what about the question I asked? It wasn't real dirty but was worth cleaning. I've removed the bottom of the underhood fuse box looking for loose connections. Once it is grounded, it controls a lot of power sources to different items. As far as the relay, it grounds with the key on to send power to the items in the diagram. I don't know if you have checked the fuel pump cut off switch as well. Any ideas what may be causing this? I disconnected and cleaned the pressure switch connector as I have read that later windstars had the pressure switch fill with brake fluid and create a short.
Seems like the pcm conrtol relay is bad. It is not mentioned in the Haynes book I am not ruling out possibility of ignition switch. Primary Fuse 1996-1998: fuse 13 1999-2003: fuse 25 Note: other fuses protect the lighting controls, and possibly the rear radio control 6 in 1999+. Iguess I shold have sent a pic fuse 20 also supplies it and that is the one tha goes through the diode that roy has pointed out. Thank You again for your help. Dave It's for cruise control only as it only has vss input and output in it then ties intor cruise Most pcms are trial and error or if you have a pro type scan tool it can check everything but the pcm.
The simplest answer is: there are fusebox diagrams in your Owners Manual. In fact I saw the box and ignored it not recognising it for a fuse box as I did not use a flashlight. I would check to see if the inertia switch was tripped. Be advised the fuse box on the drivers side is shaped differently than in the past with ford vehicles. Beware the fuse boxs are layed out slightly different from 1992 to 1996, tho you should be able under the hood in the power distribution box go by amps as a guideline referanceing the above listed pdf manual. At this point I disconnected and drove it up until sunday night when it blew again Grrrr.
Also scan for codes if mil comes oand try freeze frame it may pick it up. Dave One way to verify if the pcm is functioning is to monitor the 5 volt reference signal when the key is on when the issue is happening. Feb 28, 2011 have you checked the fuse and relay for fuel pump. Thanks, As I mentioned first question the cam sensor pulses when cranking 10-12v connection seems good. Besides teh pcm it powers a few other things like shift solenoids, etc. I noticed some other connectors that I was thinking about disconnecting to see if the abs unit is shorting inside. There is extensive cove … rage of fuses and the circuits each one protects starting around page 341 in the 1996 Owners Manual.
If higher or lower it could e your problem as well as the connection. All fuses checked out early in all this. Fuse 20 sends power to teh ignitin coils as well. The fuse diagram is in the owner's manual. Also have your tried to reset your anti theft as that can do it as well.