wiper switches compatability

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shesaidsmom

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anyone know if you can switch out a 2 speed wiper switch PN2770378 from a 69 dart and use a 2 speed switchPN2820525 from a 67 dart? they have the electric washer pump.
 
Wipers are "complicated." My standard answer is to start with Passion......

Welcome to Passion4Mopars - Because Mopars Are My Passion Too

...........which has a lot of information at that site. Then go to MyMopar.......

MyMopar - Mopar Forums & Information - MyMopar Tools/Reference

........and download "several years" of factory service manuals for free.

Then consult not only the various years wiring diagrams, but read the wipers section in the electrical section (8) which has charts, partial diagrams, and troubleshooting procedures.
 
I don't know if the physical differences really matter but worthy of mention...
The 2 flats that orient the switch in the panel were rotated 90 degrees from 67 model to 68 up. About the same time they moved the thermal overload protection from inside the switch to outside the switch. Its possible that these physical differences are the only differences and either switch will plug in and function the same. Like stated above, wire count, color, orientation in that harness connector is the key.
 
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