No clicky...No Nothing

[sportracer]

Ok first I should start off by saying I have a 1998 Mercury Mystique with a 2.5 automatic. The problem I started out having is my car would fall on its face when i start driving in gear. We(everyone on here thanks again) figured out it was the vss sensor. So after taking a look at the 1999 harness(which I had on my engine to begin with) and the 1998 harness(which every other componet on my car is) found out that the 1998 has the vss sensor by the passenger axle and the 1999 has if im correct the vss sensor by the drivers axle, 98 is the gear driven one and the 99 is not. I figured out that my pcm must not be reading the sensor causing the problem, so I went out to the junkyard and grabbed a 98 harness and vss sensor and swapped them out. Now I ran into another problem after putting it all back together I get nothing when trying to start it. No click..Nothing. I noticed a few differences in the harness's, like the two rear o2 sensor harnesses were different(connectors) so I spliced in the ones from the 99 and the other difference was there was not wire for the sensor on the rear of the engine about have way up. Other thing I have going on is the wiring going from my battery + to the starter and the wires from the battery + to the fuse block are showing. What could the problem be, everything worked with the 99 harness. I am going over the 99 harness again to see if there is any difference between the pcm connector and the square connector on the two harnesses.

 

[CSVT_2004]

Ok first I should start off by saying I have a 1998 Mercury Mystique with a 2.5 automatic. The problem I started out having is my car would fall on its face when i start driving in gear. We(everyone on here thanks again) figured out it was the vss sensor. So after taking a look at the 1999 harness(which I had on my engine to begin with) and the 1998 harness(which every other componet on my car is) found out that the 1998 has the vss sensor by the passenger axle and the 1999 has if im correct the vss sensor by the drivers axle, 98 is the gear driven one and the 99 is not. I figured out that my pcm must not be reading the sensor causing the problem, so I went out to the junkyard and grabbed a 98 harness and vss sensor and swapped them out. Now I ran into another problem after putting it all back together I get nothing when trying to start it. No click..Nothing. I noticed a few differences in the harness's, like the two rear o2 sensor harnesses were different(connectors) so I spliced in the ones from the 99 and the other difference was there was not wire for the sensor on the rear of the engine about have way up. Other thing I have going on is the wiring going from my battery + to the starter and the wires from the battery + to the fuse block are showing. What could the problem be, everything worked with the 99 harness. I am going over the 99 harness again to see if there is any difference between the pcm connector and the square connector on the two harnesses.

I'm not an engine expert, more audio, but have you tried multi-metering the power connections from the battery to various components? Like the alt, main fuse block in the car, etc...? If you're getting power then I'm kinda out of ideas for the description you gave. Someone else probably has more ideas that I do, but I'd start there, easy to start with the easy things, than rip it all apart and have it be something simple in the first place... Hope you find your problem and get it fixed.

Peace!

 

[sportracer]

Im in the process of testing the power to the fuse panel, I dont think that is the problem since I have interior lights, headlights, turn signal, fuel pump and anything else thats gets powered up. The only thing that doesnt work is when i go to crank I get nothing, not even a click in the relay in the engine compartment. Would this be something in the fuse panel or would it be a connector somewhere in the engine side wiring harness. I know the only ones that would affect it starting would be the mlps sensor, the square sensor and the pcm sensor. so im not sure what it is.

 

[CSVT_2004]

Im in the process of testing the power to the fuse panel, I dont think that is the problem since I have interior lights, headlights, turn signal, fuel pump and anything else thats gets powered up. The only thing that doesnt work is when i go to crank I get nothing, not even a click in the relay in the engine compartment. Would this be something in the fuse panel or would it be a connector somewhere in the engine side wiring harness. I know the only ones that would affect it starting would be the mlps sensor, the square sensor and the pcm sensor. so im not sure what it is.

My bad, didn't realize you were getting all that, I'd start at the ignition cylinder and test the starter wire, see if you get 12 volts when you try cranking, if you do you know it's something in the engine compartment probably.... Could possibly be one of those weird things where the starter is dead and it just happened to happen when you switched stuff around, sounds crazy, but I've seen weird stuff like that happen before doing car audio installs..... where something works, but then doesn't work for no reason at all... something small like power mirrors, works fine, you put a radio in the dash, which is completely separate from it, mirrors don't work.... test the wires at the control switch and they are all good, just stopped working when it was in the bay.... I hate when crap like that happens... sorry got a lil off subject...

 

[sportracer]

ok will let you know what happens

 

[sportracer]

Ok tested the starter I get no volts on the little peg(one from the little wire that runs from the fuse box) and 12 volts at the big pig(one from the battery) and then I tried testing directly at the connector at the postive post on the battery and still nothing. does anyone know where I can get a diagram of the engine compartment fuse box and interior fuse box. I lost the book for this car.

 

[sportracer]

I was reading thru the schematics for the car and it looks like I should still here the relay kick in even if the mlps sensor and pcm and the square connector dont line up. Could the relay have blown? If so what one is it I have spares. What could some more problems be, I would like to try and figure this out tonight, Sucks not having a car.

 

[projectSHO89]

Depending on the build date of the donor 98 (3/98), there may be a difference in the PATS' starter inhibit circuit. The older version ran the low side of the starter relay coil tot he PATS module, the latter versions, including 99s, eliminated that module and incorporated its functions directly into the PCM.

You can eliminate the starter inhibit PATS function by locating the BLACK/GREEN wire at the MLPS (TRS) and jumpering it to chassis ground.

Steve

 

[sportracer]

so you take it from the fuse box side and go to ground or from the mlps side and go to ground. Shouldnt you still hear the relay kick in even if pats has armed which it didnt becuase the light is not blinking. I had pats go off before and I could still here the relay turn on?

 

[sportracer]

Anybody have any ideas, I dont know where to start looking since i dont have a fuse diagram for the engine compartment. Or why it isnt getting power, PLEASE some one help.

 

[CSVT_2004]

Anybody have any ideas, I dont know where to start looking since i dont have a fuse diagram for the engine compartment. Or why it isnt getting power, PLEASE some one help.

make/model/year an i can get you a diagram, just let me know what parts you need to see..

 

[sportracer]

I need the diagram for the engine compartment fuse box and whats what in it. That way I can go in-depth a little more with the testing. Still dont know why im not getting power to the relay though, that shouldnt have been affected with what I changed.

 

[CSVT_2004]

I need the diagram for the engine compartment fuse box and whats what in it. That way I can go in-depth a little more with the testing. Still dont know why im not getting power to the relay though, that shouldnt have been affected with what I changed.

I'll get that as soon as I can, my webserver(VM) is down because I'm messing with my server (hosting the VM) because I can't RDP into it from my other computer, hope to have it resolved here within the hour, then I can post my pics on my webserver an reference them to this post for you.

 

[sportracer]

take your time ill be up most of the night, god I hate electrical problems. I thought it was easy and it would have been the harness I put in and all I had to do is go over the connectors and make sure they where the same as the 99 as that one worked just fine but nope nothing.

 

[CSVT_2004]

Hopefully your windows will know how to read these.. they are .mdi files because I had it print to and image instead of a printer, which is much easier than trying to screen shot everything and post it... so here they are, the file format is Microsoft Document Image Writer (.mdi)

Might want to save them, b/c I may be rebooting the server at some point tonight...

Update: Server is up and running good, needs to be rebooted for a name change, but other than that I got all the kinks worked out tonight, probably reset it sometime tomorrow, probably be like a 20 min outage during that time for reboot and VM restoration...

http://b-rad.is-a-geek.net/ceg/1998 Mercury Mystique/

 

[sportracer]

Anybody know what the problem is or where to start looking, I would rather not have to bring it to the local $tealer$ship. On another note would do you need to switch pcm. Can you put in a new pcm with a key for that pcm and not trip the pats? Or do you need to get it reprogramed. I accidentilly broke the screw holding in the connector and cant get it out with the bolt extractor.

 

[CSVT_2004]

Anybody know what the problem is or where to start looking, I would rather not have to bring it to the local $tealer$ship. On another note would do you need to switch pcm. Can you put in a new pcm with a key for that pcm and not trip the pats? Or do you need to get it reprogramed. I accidentilly broke the screw holding in the connector and cant get it out with the bolt extractor.

my print out's any help at all? I think there are 2 pages or so of engine performance diagrams as well, for the 2.0 and 2.5

 

[sportracer]

no they didnt work on this comp. I think I might have to bring it to ford aghhhh. I hate this car. I dont know how to fix this and now that the bolt on the pcm broke puts a kink in it. I think it will sill work with just pushing it in but I dont know. I not sure anymore?

 

[CSVT_2004]

no they didnt work on this comp. I think I might have to bring it to ford aghhhh. I hate this car. I dont know how to fix this and now that the bolt on the pcm broke puts a kink in it. I think it will sill work with just pushing it in but I dont know. I not sure anymore?

let me try changing them to .tiff's and see if that works for ya.

 

[sportracer]

Ok thanks for the help. I thought of something to try. I looked at my old wiring harness and noticed that the wire they added in before to get it to work was not just replacing a wire but instead he ran the wire from the mlps sensor blk/grn wire I think to a white/grn wire I think on the square connector. The blk/grn wire normally runs to the pcm, so I hope changing this on the new harness will do the same since its generally the same.