Electrical - Automatic to Manual - Need Wiring Help | Ford Escort Owners Association (FEOA)
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Electrical Automatic to Manual - Need Wiring Help

Discussion in '2nd Gen 1991-1996 1.9L SOHC' started by 97spiwrecker, Sep 23, 2015.

  1. 97spiwrecker

    97spiwrecker FEOA Member

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    Hello!

    I just picked up a 1994 Escort wagon that doesn't haven even one spec of rust on it (a Michigan unicorn). It dropped a valve seat so I'm transplanting the engine and trans out of my old 94 wagon that rusted so bad that the trans support bracket broke away from the core support.

    Long story short, my 97 auto to manual swap was all plug and play from what I remember. This swap does not seem to be working out that way (the 94 I just bought was an automatic). Does anyone have a wiring diagram that would show me how to wire in the clutch position sensors and manual transmission to the automatic harness? I already have the manual trans ECU installed, but there is no wiring for clutch or manual transmission on the stock auto harness, and I really don't want to pull the dash on both cars to swap the whole thing if possible.

    I read somewhere that there are two wires that need to be jumped in the auto harness to allow the vehicle to start (neutral safety switch I'm assuming?). I'd like to wire them into the clutch switch. I also noticed there are two clutch switches on the pedals...what's the second one for?

    For the transmission, I see a reverse light switch that I need to wire in, and I know there is another plug on the trans but I'm not sure what it's for? I'd like to modify the auto harness for full functionality. I can cut the connectors off the manual harness in the old car to make it "right" so to speak.

    Lastly, any tips on the cruise control? I don't know what module handles this function. The old car didn't have cruise, the new one with the automatic did. Can I make the cruise work with the manual transmission swapped in? This is the other reason I really want to wire the clutch switches in. IF the cruise is functional, I wan't the disable functions to work too...

    I'm sorry if this is a re-post. I looked around for over a half hour and couldn't really find what I was looking for. I plan on finishing this project this weekend, already got the new clutch installed and engine and trans mated together ready to be dropped into the new car. Should be a one day even't after the wiring is sorted out and then I can finally drive it! I haven't driven one of these older escorts in about eight years and I've never been so excited to get back into one!

    Also, if anyone needs any parts (door panels, interior panels, seat belt motors, seats, etc...) let me know. Dark red car (paint is faded on hood, good doors though) with grey interior that's in excellent shape. I have like three of those rear cargo area shades now too. The guy I bought the new car from gave me boxes and boxes of parts. Thank you all!!
  2. Blueescortproject

    Blueescortproject FEOA Member

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    I just did an auto to manual swap in a 95 a month or so ago so I had to go through the same thing. I would recommend cutting the pigtails off the automatic and splicing into that instead of ruining the harness in the car.

    The wires you need to connect together are the two large gauge ones at the transmission, they are Black with a Blue stripe and Black with a Red stripe. This will bypass the clutch start switch (the white one that gets depressed with the pedal down) and will allow you to start the car. Please note that if you just wire cap them together the car will try to start no matter what, be it in gear or not, so be careful.

    The reverse lights are controlled by the screw-in switch on the firewall side of the manual transmission. Should be just two wires. The wires in the automatic harness that provide power to the lights are the Black with Yellow stripe and Red with Green stripe. (The other plug coming from the manual has something to do with speed and gear sensors or something so the "Shift Up" light will work, I just zip-tied them out of the way)

    However I ran into the odd problem that when I wired the manual transmission switch into these wires the lights would come on in every other gear but turn off in reverse. Not sure if this is due to a faulty switch on mine or what. So you may get a different result but according to my schematics, how I had it wired should have worked.

    As for keeping the automatic's cruise control working I don't see why it would be a problem. The automatic and manual both use the same brake light switch. So all you would need to do is make sure everything is plugged in under there and it should work as normal. However it would not disengage if you were to squeeze in the clutch, (that is what the other switch on the clutch pedal is for) so be careful there. Otherwise I see nothing in the schematic that is directly tied to the automatic transmission.

    I have the schematics I could take a picture of if you really need, just PM me.
    Last edited: Sep 24, 2015
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  3. denisond3

    denisond3 Moderator Staff Member

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    Im glad to finally know what the wires coming from the screw in item on the front side of the transmission are for!
  4. 97spiwrecker

    97spiwrecker FEOA Member

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    You are a savior!! Thank you so much for the input! Since you did the swap too, did you use an auto steering column or a manual one? I used my auto far because of the cruise buttons but it has a mechanical lock lever that is not needed for the manual car. I'm thinking I need go back to the manual column and swap steering wheels? Thank you again.
  5. denisond3

    denisond3 Moderator Staff Member

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    You can probably disconnect the manual lock 'cable' pretty easily.
  6. 97spiwrecker

    97spiwrecker FEOA Member

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    Well you have to anyways (sort of) since you remove the automatic shifter that the cable runs to. But, I noticed that the lever had to be in a certain position to allow the key to be removed. Not all the way forward or back, but about 3/4 of the way back on the column. I guess I could glue it in place, strap it in place, etc... But again, I want to do this as right as possible.

    I'd also really love a schematic for the manual transmission so that I can see where the up-shift light sensor runs to. As stupid as it is, I want it to work. Though I think this can be an after installation project. I need to get this car on the road now. My hour plus commute to work each way is getting expensive in this old cougar I'm driving right now...

    Thank's everyone.
  7. 97spiwrecker

    97spiwrecker FEOA Member

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    Figures, after I ask on this forum I kind of found what I needed looking for additional information. Anyone looking for decent wiring diagrams should check out http://www.wilsonautoelectric.com/tsb_database.html

    Now I just need to attempt to wire it correctly. I'm a bit of a perfectionist and I'm finding myself taking many extra steps with this particular car. More than you're average sane person would with a 21 year old economy car, hah. Cheers everyone, thanks again.
  8. Blueescortproject

    Blueescortproject FEOA Member

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    I used the automatic column but took the cable off the "lock" thing that went to the auto gear lever. Not sure if this has anything to do with it's difficulty sometimes of getting into the "lock" position but since my key is removable in all positions I didn't worry about it.

    If you want to bypass the cable-lock-thing, you should be able to just tie the lever at the key barrel itself into the correct position so that it thinks it's always in park. (I see that this has already been answered. Guess I should have read further into the thread before jumping the gun and replying heh.)

    If you wanted to use the manual column you would also have to switch all the locks on the doors and such or carry two keys. Switching the wiring for the cruise buttons over from one column to another is pretty easy from what I remember, I added them to my 91 but never got around to finishing the rest of the cruise wiring for it.

    As for the "upshift" light, I'll send you a picture of the schematic for that in a PM. Doesn't look like it would be too hard to wire in. You may have to switch the clusters though, then again, you may only need to add the bulb.
    Last edited: Sep 28, 2015
  9. Blueescortproject

    Blueescortproject FEOA Member

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    Wanted to reply to you specifically as well as to the entire thread because it seems I may have made a mistake.

    The plug on the firewall side of the manual transmission seems to be the "Neutral Switch" and the plug on the radiator side of the transmission is the "Backup/Upshift" switch. This would explain my own confusion. It would seem that the PCM uses information from both switches to determine backup lamps, shift indicator, etc.
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  10. 97spiwrecker

    97spiwrecker FEOA Member

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    You are absolutely correct. I have harness completely disassembled from the old car and managed to de-pin the wires for the upshift light so I can pin them directly into the empty spot on the ECU and cluster. I already added the missing bulb on the cluster :)

    So the switch on the firewall side of the trans is for neutral indication? I traced the wires for it and they both join big splices with three or four wires of the same color tied in. I'm really confused on this particular sensor and it's function. I tried the best I could to follow it back to the ECU and found that on my manual harness the wire colors are ltgrn/blk which goes to pin 46 on the ECU and brn/yel which goes to pin 30 on the ECU. With the crazy splicing I ran into I'm still unsure on this switches actual purpose. It also appears that the auto harness already has the ltgrn/blk wire at pin 46, but I didn't see a brn/yel wire at pin 30 (I think it was dkgrn/blk but it was getting dark outside and I couldn't see very well at that point). Any hints on this?

    Good catch on the key differences between the two columns and door locks, I completely missed that problem. I'll be zip-tying my key lock in place, haha.

    I'll be wiring the auto harness up today and hopefully will be ready to finally drop in the engine/trans tomorrow. I'll take some pictures of my work and maybe make a how-to for anyone else who still loves this generation escort. Thanks again.
  11. 97spiwrecker

    97spiwrecker FEOA Member

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    I have everything wired except the clutch switch for the cruise (the one on the front that signals when the pedal is starting to be depressed. Coincidentally this clutch switch and the sensor on the firewall side of the trans (located right where the shift linkage is) have the same colored wires, ltgrn/blk and brn/yel. The ltgrn/blk is a signal return on the PCM pin 46. What I really want to know is what PIN 30 is for. The auto harness has a blk/blu wire there, the manual has the brn/yel wire shared by the mentioned sensors.

    Think I can just splice the brn/yel wires together and run them to the blk/blu wire at pin 30 on the PCM and tie it in there? The auto harness shows that pin 30 gets power when the ignition is turned to "start". I'm thinking I need to de-pin that circuit all together and replace it with the wiring from the clutch and shift position. I just wonder if there are any other functions that should be on that circuit as well?

    If the auto harness receives signal in "start" on that pin, why would the manual setup open it to signal return depending on clutch/shifter position? Could the PCM have a pull down resistor or something on that circuit that would let it know when signal return is sensed? I'm so confused.

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