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  1. #1

    Default Adding intermittent wipers unsuccessfully... Don't know what to try next

    My 83 Capri rs turbo came without many options. The 2 speed wipers worked but I had a chance to snag a n intermittent wiper module and switch from an 86 mustang but couldn't confirm it worked. After plugging everything in the 83 I get low speed when the switch is set to hi and no response when the switch is set in low or intermittent. I don't know what to check or try next, advise is appreciated.

  2. #2

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    A quick look here: http://vb.foureyedpride.com/showthre...79-1986-in-PDF seems to indicate the wiring harnesses might be different so it's not just remove one module and install the other...
    Last edited by great white; 04-29-2017 at 09:01 AM.

  3. #3
    FEP Power Member craigerSS's Avatar
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    well I got to say it, what are you doing driving that in the rain?
    here's to the freakin' weekend,I'll drink to that

  4. #4

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    You might have to re-pin one or both connectors. I had to do that when i got a wrong-year wiper switch for mine. ('89 vs. 90)
    Brad

    '79 Mercury Zephyr ES 5.0L GT40 EFI, T-5
    '17 Ford Focus ST
    '14 Ford Fusion SE Manual

  5. #5

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    Quote Originally Posted by ZephyrEFI View Post
    You might have to re-pin one or both connectors. I had to do that when i got a wrong-year wiper switch for mine. ('89 vs. 90)
    Wow, that suprises me... same plugs, seems weird Ford would change it up.

  6. #6

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    Believe it! I was shocked too!

    Sent from my XT1650 using Tapatalk
    Brad

    '79 Mercury Zephyr ES 5.0L GT40 EFI, T-5
    '17 Ford Focus ST
    '14 Ford Fusion SE Manual

  7. #7
    FEP Super Member xctasy's Avatar
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    Std Ford rule 1. Wiring runs from pinout to pin out, but for any year, anything can change within the wiring cluster. Literally, anything.


    Std Ford rule 2. Ford wires cars in the factory to suit whatever parts the suppliers buy in for Fords let out contracts, and the whole bundles can be unbundled, or the wire codes swapped.


    Std Ford rule 3. Just like a cable runner for a chocolate factory machine install, the cables run from the terminal part, back to to the supply. The whole cable batches are sorted backwards, and if you’re building components to succeed reliably, an easy cable code swap fixes any problem. That why Ford changes everything. It’s about keeping the Wonka Vision going; it doesn't have to relate to any other model year.

    Brocks 84 Rewire, not one real part of the Ford EVTM or Haynes or whatever grocery list is ever 100% right. They change sometimes, but you'll certainly find the Variable Wiper function is differnt between years.

    Just because they have a nice black, new white stencilled part in a Motorcraft box doesn't mean it'll be upward compatable with your loom.





  8. #8

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    I added intermittent to my GT350 just by plugging in the module pictured above and obviously adding the wiper arm with the control. It was all plug and play. The module just plugs inline in the middle. No pinout or wiring changes needed.
    Liberty once lost is lost forever.

    John Adams
    July 7, 1775

  9. #9

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    We've seen before that not all wiper switches have the same pinout, and likewise this would be true for the interval
    wiper governor. They must be a matched pair, AND be the correct ones for your car. Can't just go by how it looks.
    This thread is an example - intermittant wiper switch
    Cheers,
    Jeff Cook

    '85 GT Hatch, 5-speed T-Top, Eibachs, Konis, & ARE 5-Spokes ... '85 GT Vert, CFI/AOD, all factory...
    '79 Fairmont StaWag, 5.0, 62K original miles ... '04 Azure Blue 40th Anny Mach 1, 37K original miles...
    2012 F150 S-Crew 4x4 5.0 "Blue Coyote"... 65 coupe, 289 auto, Pony interior ... '67 coupe 6-cyl 4-speed ...
    '68 Vert, Mexican block 307 4-speed... '71 Datsun 510 ...
    And a 1-of-328 Deep Blue Pearl 2003 Marauder 4.6 DOHC, J-Mod, 4.10s and Lidio tune

  10. #10

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    Homer, you just got lucky!!
    Brad

    '79 Mercury Zephyr ES 5.0L GT40 EFI, T-5
    '17 Ford Focus ST
    '14 Ford Fusion SE Manual

  11. #11

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    As luck would have it the 1983 wiring diagram has a black page for the page which is supposed to have the wiper pinout. I have tried to view the wiring diagram on multiple different computers and on iPad without luck.If anyone knows how to cross reference the pinouts between the 1983 and 1986 Mustang I would be most grateful.
    Last edited by foot2floor; 05-08-2017 at 03:43 PM.

  12. #12

    Default

    The only difference between '83 and '86 is where the interval module is grounded, which brings up a question-
    Is your interval module securely mounted to the dash frame using the two screws? Reason being, in '83 one
    of those screws IS the ground point for the module. ('86 ran an additional connection to the main dash ground
    between the radio and glovebox.)

    If your interval module is currently floating in mid-air, or just tied up under the dash, that probably won't work
    too well on an '83. Likewise, if your interval module does not have the ground pigtail tied to a brass eyelet in
    one of the screw holes, you will need to provide the ground connection.

    Here's the '83 Interval Wipers diagram -

    Name:  83IntervalWipers.jpg
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Size:  136.1 KB
    Last edited by JACook; 05-09-2017 at 09:21 AM.
    Cheers,
    Jeff Cook

    '85 GT Hatch, 5-speed T-Top, Eibachs, Konis, & ARE 5-Spokes ... '85 GT Vert, CFI/AOD, all factory...
    '79 Fairmont StaWag, 5.0, 62K original miles ... '04 Azure Blue 40th Anny Mach 1, 37K original miles...
    2012 F150 S-Crew 4x4 5.0 "Blue Coyote"... 65 coupe, 289 auto, Pony interior ... '67 coupe 6-cyl 4-speed ...
    '68 Vert, Mexican block 307 4-speed... '71 Datsun 510 ...
    And a 1-of-328 Deep Blue Pearl 2003 Marauder 4.6 DOHC, J-Mod, 4.10s and Lidio tune

  13. #13

    Default

    Quote Originally Posted by JACook View Post
    The only difference between '83 and '86 is where the interval module is grounded, which brings up a question-
    Is your interval module securely mounted to the dash frame using the two screws? Reason being, in '83 one
    of those screws IS the ground point for the module. ('86 ran an additional connection to the main dash ground
    between the radio and glovebox.)

    If your interval module is currently floating in mid-air, or just tied up under the dash, that probably won't work
    too well on an '83. Likewise, if your interval module does not have the ground pigtail tied to a brass eyelet in
    one of the screw holes, you will need to provide the ground connection.

    Here's the '83 Interval Wipers diagram -
    Thank you so much. The 86 wiper interval module that I have does not have any ground connectors outside its case. I also noticed that it uses a center plug in its terminal however the 83 does not. Is it possible that my issue is that I do not have any ground through the harness or outside case?

  14. #14

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    This first picture is the part number of the module I got from the 86 mustang
    Name:  20170508_161533-816x459.jpg
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    Next is a shot of the plug for the module and the matching intermittent switch
    Name:  20170508_161517-816x459.jpg
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    This is a shot of the factory 2 speed switch (without a center pin) and the input side of the module
    Name:  20170508_161525-816x459.jpg
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    Here's the back of the main car harness,notice without a center plug
    Name:  20170508_161551-459x816.jpg
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    And the front of the main harness plug
    Name:  20170508_161558-816x459.jpg
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    Last edited by foot2floor; 05-09-2017 at 09:13 PM.

  15. #15

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    JA is right the wiper regulators should all be wired the same and is the same regulator used on 92-96 F-150's. However on my 86 "86 sold late in 85" that some wire colors changed from early 86 to late 86 causing confusion. Just check where each pin is supposed to connect and you should be fine.

  16. #16

    Default

    It looks like the main issue is a lack of center pin in the 83 harness. It makes me wonervous if the ground eyelet spoken about for 83 became that center pin as a ground in the 86 cars?
    Last edited by foot2floor; 05-12-2017 at 07:57 AM.

  17. #17

    Default

    Quote Originally Posted by foot2floor View Post
    It looks like the main issue is a lack of center pin in the 83 harness. It makes me wonervous if the ground eyelet spoken about for 83 became that center pin as a ground in the 86 cars?
    The '83 would not have had any ground wire in the under-dash harness. I ran into this same issue back when
    I upgraded my '79 StaWag to interval wipers, though I noticed it before trying to operate them.

    It's an easy fix, just remove the pin from the governor module connector, and ground it. I used a spare 1-pin
    connector shell I had, and made a ground jumper so it sorta looks OE, but there's no functional reason why
    you couldn't just put a ring lug on the end of that wire and ground it to the mounting screw.
    Cheers,
    Jeff Cook

    '85 GT Hatch, 5-speed T-Top, Eibachs, Konis, & ARE 5-Spokes ... '85 GT Vert, CFI/AOD, all factory...
    '79 Fairmont StaWag, 5.0, 62K original miles ... '04 Azure Blue 40th Anny Mach 1, 37K original miles...
    2012 F150 S-Crew 4x4 5.0 "Blue Coyote"... 65 coupe, 289 auto, Pony interior ... '67 coupe 6-cyl 4-speed ...
    '68 Vert, Mexican block 307 4-speed... '71 Datsun 510 ...
    And a 1-of-328 Deep Blue Pearl 2003 Marauder 4.6 DOHC, J-Mod, 4.10s and Lidio tune

  18. #18

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    Good news, quick fix. I only needed to add that center ground pin with no other changes and I was cooking with gas. Wipers are working! Case close, thanks to all who contributed

  19. #19

    Default

    Glad to hear it!
    Brad

    '79 Mercury Zephyr ES 5.0L GT40 EFI, T-5
    '17 Ford Focus ST
    '14 Ford Fusion SE Manual

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