Wiper Motor Switch Schematic Doesn't Agree w/the Physical Part? 68 Dart

[Douglas Acebal]

Need some help. Yes, I searched other posts for answers. The wiper motor switch PN 2770378 should be original to the car. I am the second owner. Car was intact OEM when purchased.

Where it says there is a red wire, mine is empty. There is a connector there, just no red wire.

Then I have this lone floating blade connector all by itself, not indicated on the schematic, but it DOES have a red wire. Not entirely sure if it is somehow connected internally, inside the housing to the schematic indicated Red?

So, my question is: Does this loan red wire replace the schematic proposed red wire to the motor?

 

[townsend]

There is a 2 spade connector on your switch.
It has a dark green wire in one opening and the other opening is blank.
The red wire goes in the empty opening on the 2 spade connector. Others may want to chime in.

 

[67Dart273]

Do not go by that diagram, it is aftermarket. Go to MyMopar.com and download a 68 or 69 service manual. You may have to settle for Dodge/ vs Plymouth

Also get into the text of chapter 8 (electrical) and read through there's quite a bit on wipers. Frankly I hate Chrysler wipers. The linkage, wiring differences, and documentation are a PITA

 

[Douglas Acebal]

There is a 2 spade connector on your switch.
It has a dark green wire in one opening and the other opening is blank.
The red wire goes in the empty opening on the 2 spade connector. Others may want to chime in.

Thanks! Do you have any idea what the lone spade is for?

I found this hand-scribbled schematic online and they wrote NC next to it. That could mean Normally Closed, but it could also mean Not Connected.

 

[townsend]

2770378 was used on 67-69 A Bodies.
The 67 model used that terminal spade for backup lights.
The 68 and 69 were wired differently and didn't use that terminal.

 

[Devinism]

I have rebuilt hundreds of the MoPar variable speed wiper switches through the years.

@townsend is correct. The 'BU' terminal is hot all the time. It is connected internally to 'B' and is left uncovered. It wouldn't hurt to put tape / heat shrink over it to keep from bumping into it and accidentally shorting it to ground.

 

[4spdragtop]

That switch is used in 67 cuda as well. Here's pic of factory schematic for 67 cuda. For our cuda, it is a white wire that goes in the "empty spot". It is for backup lights

Thanks! Do you have any idea what the lone spade is for?

I found this hand-scribbled schematic online and they wrote NC next to it. That could mean Normally Closed, but it could also mean Not Connected.

View attachment 1716281308

View attachment 1716281309

 

[4spdragtop]

Yes it was, was used on our 67 for backup lights. If I'm reading his drawing correctly.

2770378 was used on different car lines.
The A Bodies did not use that spade terminal.

 

[townsend]

According to the wiring diagrams 4spdragtop is right on the 67 models.
Post #5 has now been corrected.

 

[4spdragtop]

Awfully weird(to me anyway) that they get power for b/u lights in 67 from a wiper switch....

According to the wiring diagrams 4spdragtop is right on the 67 models.
Post #5 has now been corrected.

 

[Douglas Acebal]

I’m with you….. thanks for all the help folks! Learn something everyday.