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Pix wanted of wiper motor with harness plugged in
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I have run into a baffling situation with the wipers. I have noted in my 1972 factory shop manual that the power wire going to the motor is in different positions by application. Note below that the A, F, and G bodies go to an end terminal, while the B's are in the center position.
https://forums.maxperformanceinc.com...1&d=1751630820 This would be no big deal except some vendors sell motors with the same part number* for both variants and the plugs will easily fit either way - with possible smoke-filled consequences... But the issue here is A bodies seemed to be wired both ways in the wild. Here a video shows a 1971 GTO undergoing wiper repair with the power feed in the center (1:40 minute mark). https://forums.maxperformanceinc.com...1&d=1751631687 https://www.youtube.com/watch?v=HbqjCRax16w My American Autowire install guide shows 1968-72 at the end as per shop manual. https://forums.maxperformanceinc.com...1&d=1751631392 Page 3 https://api.americanautowire.com/sho...543_IN_4.1.pdf Granted, these cars are all over 50 years old, so may have been modded a bit or a lot. I ask you to post pix of what you have, especially if it is very stock. Perhaps we can see where this goes. * Cardone for 1971 GTO via Rockauto BUICK CENTURY 1973 BUICK ELECTRA 1968-1973 BUICK ESTATE WAGON 1970-1973 BUICK LESABRE 1968-1973 BUICK REGAL 1973 BUICK RIVIERA 1968-1973 BUICK SKYLARK 1968-1972 BUICK SPECIAL 1968-1969 CADILLAC CALAIS 1968-1973 CADILLAC COMMERCIAL CHASSIS 1968-1973 CADILLAC DEVILLE 1968-1973 CADILLAC ELDORADO 1968-1973 CADILLAC FLEETWOOD 1966-1973 CHEVROLET BEL AIR 1972-1973 CHEVROLET BISCAYNE 1972 CHEVROLET CAMARO 1968-1973 CHEVROLET CAPRICE 1972-1973 CHEVROLET CHEVELLE 1969-1973 CHEVROLET CORVETTE 1973 CHEVROLET EL CAMINO 1969-1973 CHEVROLET IMPALA 1972-1973 CHEVROLET MALIBU 1973 CHEVROLET MONTE CARLO 1970-1973 GMC SPRINT 1971-1973 OLDSMOBILE 98 1968-1973 OLDSMOBILE CUSTOM CRUISER 1971-1973 OLDSMOBILE CUTLASS 1968-1973 OLDSMOBILE CUTLASS SUPREME 1971-1973 OLDSMOBILE DELTA 88 1968-1973 OLDSMOBILE F85 1968-1972 OLDSMOBILE TORONADO 1968-1973 PONTIAC BONNEVILLE 1968-1973 PONTIAC CATALINA 1968-1973 PONTIAC FIREBIRD 1968-1973 PONTIAC GRAND AM 1973 PONTIAC GRAND PRIX 1968-1973 PONTIAC GTO 1968-1973 PONTIAC LEMANS 1968-1973 PONTIAC T EMPEST 1968-1970 PONTIAC VENTURA 1971-1972 |
Anybody?
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i sent you a text with pics
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This is from my 68 GTO. Its wired like the 72 B body.
https://forums.maxperformanceinc.com...1&d=1751764028 And here what I think is why. The service manual schematics are drawn primarily for a no option car. For the A body, this means the rectangular (or non hidden wiper) motor. The power lead, Blk /Yel, is on the #2 terminal which is on the end. For the round (or hidden wiper) motor the Blk / Yel is in the middle. Since the Round motor is standard on the B body, thats what's shown on the B body schematic. The 71/72 service manuals no longer show how to overhaul the wiper motor. But in the 68 manual it shows a wiring diagram of the 'Optional' motor. https://forums.maxperformanceinc.com...2&d=1751764044 I think by 71/72 the rectangular motor was replaced by the round motor. But the 71/72 schematics don't reflect this. Or is the non hidden round motor wired the same as the older rectangular motor? Someone with more knowledge of the 71/72 wiper motors can answer that. Delco placed barbs on the motor terminals and open areas on the plugs to fit over the barbs. This prevents mis-wiring. The plug(s) can only go on one way Photos show my original motor with an M&H replacement harness. https://forums.maxperformanceinc.com...9&d=1751763997 https://forums.maxperformanceinc.com...0&d=1751764012 |
As a followup I searched for under hood photos of 72 Tempests and noticed they did have rectangular wiper motors. That would explain the different wiring.
To sum it all up, The Yellow/Blk wire is on the end for rectangular motors and in the center for round motors. Schematics will show the base model car which will be with a rectangular motor. The next question for my education would be; Why does the Grand Prix schematic show a rectangular motor electrical connection? I'm assuming of course that all G bodies came with hidden wipers. |
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Further examination shows this 1968 GTO base motor:
https://forums.maxperformanceinc.com...1&d=1751791605 Note how the 3 terminals are split 2-1 versus the round motor 3 in a row. I was puzzled why a 3 terminal round motor would have 2 connectors for 3 terminals... Indymanjoe sent this to me, not sure if the connector is one or two piece... so maybe earlier round motors have 2-1 connectors while later are 3. https://forums.maxperformanceinc.com...1&d=1751791774 The 2 speed square wiper soldiered on till 1987, last seen in Chevettes and T1000's according to RA parts interchange. |
the top wire is by itself the bottom 2 are one connection.
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Indymanjoe has confirmed the connector is indeed a 2 piece unit. My guess is GM wanted one less permutation on the wiring harness, even though the motor and switch are different. Not sure why this did not carry thru on later (70-72?) model years which seem to have the 3 prong connector.
https://forums.maxperformanceinc.com...1&d=1751810919 |
Update
I contacted American Autowire. They responded quickly. I noted to them the issues. I was told their tech department would look at it,
In summary, OG68 is correct: the wiring shown is for the square motor and AAW has the wrong routing on their round motor wiring. |
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