GM Intermittent Wiper Module

  • Upgrades classic GM vehicles to include three intermittent wiper delays in addition to the stock slow and fast speed options.
  • Utilizes the stock two speed wiper switch and motor for a totally stock appearance.
  • Designed to work with GM two-speed, non-hiding wipers.  Will not work with hiding (recessed park) wiper motors.
  • Add intermittent wipers to your Chevelle, Nova, Caprice, El Camino, Corvair, Camaro, Firebird,  trucks, etc.  New software now works with C2 Corvettes (make sure you tell us so you get the latest software if you need this for a '63-'67 Corvette.)
  • Yes, it works great with the '67-'72 Chevy Trucks!  (Installation photos here)
  • One year warranty

$71.99  PN 13009 (GM cars and trucks from the 60's and early 70's with factory two-speed, non-hiding wipers)

13009 Installation.PDF          Buy Now

GM Switch Styles

Is there anyone who does not appreciate the intermittent wiper function?  Being able to set the wipers to swipe once every so-many seconds - that is convenience.  Whether it be a light rainfall or just some early morning mist, the intermittent function is nice to have.  Really nice.

This module allows you to upgrade your 60's or early 70's GM car or truck to include this feature.  AND it does so while allowing you to keep your stock switch so the interior continues to look original.  Works with the stock washer mechanism as well.

Works with GM vehicles with the factory two-speed wiper switch and motor; and must be the non-hiding style.  This module installs between the switch and harness.  Three intermittent settings as well as the stock-slow and stock-fast settings become available.

No need to change your stock switch or stock motor.  Just wire in this module behind the dash, between the switch and harness.

"How are you able to use the stock switch and motor?" you ask?  Obviously, we can't use the switch in the typical manner with each position being a unique delay setting or speed.  Our module contains a microprocessor running software which uses the switch's three positions to sequence through a series of modes.  We like to describe these modes as "rungs of a ladder".  Each rung is a delay setting or a wiper speed.  The lowest rung of the latter is the longest delay (about once every 8 seconds).  The next rung up is the next shorter delay (about once every 5 seconds).  The third rung up is the shortest delay (about once every three seconds) with the fourth rung being a continuous (stock slow) speed.  The highest rung is the stock fast setting.  The stock switch has three positions.  Leaving the switch in the middle position (normally the stock slow speed setting) tells the software to stay at your current rung of the ladder.  Moving the switch briefly to the fast setting and back to the middle position tells the software to move up one rung.  Moving the switch briefly to the off setting and back to the middle tells the software to move down one rung.  Need a shorter delay? Just move the switch to the fast postion and back to the middle position to move up one rung of the ladder.  You can instantly move up to the top of the ladder by leaving the switch in the fast setting and you can instantly move to the bottom of the ladder by leaving the swich in the off position.  

Another analogy for the way this works is to think about how some of the modern automatic transmissions use a slap-shift position on the console.  Move the selector into this position and you slap the handle up to shift up one gear or slap it down to shift down one gear.  Need to go down two gears? Slap the handle down twice.  Moving up or down the "rungs of the ladder" works the same way.

$71.99  PN 13009 (GM cars and trucks from the 60's and early 70's with factory two-speed, non-hiding wipers)

13009 Installation.PDF


Listen to one of our customers:

"...it really was a simple install.  Instructions were precise and easy--works as described.  Very pleased with the product.  The real beauty of the intermittent wipers module is that you don't have to change anything-not even the knob.  If you have a car that has some parts that are almost impossible to find ( like knobs for a '68 Nova), this is a real treat to find."  Pete, '68 Nova


Concerned you won't be able to figure out how to wire your switch?  Check out our white paper on the various switches and their wiring (see here).  Or, send it to us and we will figure it out for you!  If you send us your switch and tell us what it is from, we will take the measurements and tell you which wire should attach where.  This will allow us to build a database of switches and post them here on our site.  Contact sales for more info.


If you have a vehicle other than a GM with factory two-speed wipers and would like to have a module like this, let us know.  It is very possible this will work with your car with minor wiring changes.

Also, we have considered making a module for the single-speed wiper vehicles.  You would have to upgrade to a two-speed wiper switch.  You would not have to upgrade any of the factory wiring or wiper motor.  If this interests you, let us know; if we get enough interest, we'll offer such a product.


Tech Specs:

2”x1.5”x1” plastic enclosure with mounting tabs.

Three delay periods: one swipe every 8 seconds, once every 6, and once every 3.

Fully potted

12 inch long, 18 gauge wires for connecting to the switch and harness.  24 inch long wires for power and ground.

Microprocessor controlled

Simple installation

Made in USA


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