**********DISCLAIMER********* IíM AT THE RESEARCH PHASE OF THIS MOD AND HAVE NOT PERFORMED/TESTED IT ON MY CAR YET. I WILL UPDATE THIS THREAD WHEN I HAVE COMPLETED THE MOD. I AM NOT RESPONSIBLE FOR YOU MESSING UP YOUR RIDE IF YOU TRY THIS WITHOUT DOING YOUR OWN RESEARCH FIRST!
I'm looking into adding the rain sensing wiper feature from the late 90's Cadillac's. I found this thread on the Cadillac forum and started the research. Added Rain Sense to 98 DeVille
The impala wiper motor appears to be the same as the Cadillac's without the rain sensing feature (CE1 option). The wiper motor needed is GM part number 22137898 (with an 8 pin connector) and the pigtail for that motor. The motors are the same but the cover/modules are different. They are found on these models:
96-97 SEVILLE WITH OPT CE1
96 DEVILLE CONCOURS
97-99 DEVILLE WITH OPT CE1
96-02 ELDORADO WITH OPT CE1
You will also need the rain sensor (located attached to the windshield behind the mirror) with 5 wires NOT the 4 wire sensor. This is GM part number 25657767 or 25713342. GM lists for interchange:
Cadillac Concours 1996, 1997, 1998, 1999
Cadillac Concours 4 DR 1996
Cadillac Concours DEVILLE 4 DR 1997
Cadillac Concours SEVILLE 4 DR 1996, 1997
Cadillac DíElegance 1996, 1997, 1998, 1999
Cadillac D'Elegance CONCOURS 4 DR 1996
Cadillac D'Elegance DEVILLE 4 DR 1997
Cadillac D'Elegance SEVILLE 4 DR 1996, 1997
Cadillac Deville 1996, 1997, 1998, 1999
Cadillac Deville 4 DR 1997
Cadillac Deville CONCOURS 4 DR 1996
Cadillac Deville SEVILLE 4 DR 1996, 1997
Cadillac Deville Touring 1998, 1999
Cadillac Eldorado 1996, 1997, 1998, 1999, 2000, 2001, 2002
Cadillac Eldorado Touring 1996, 1997, 1998, 1999, 2000, 2001, 2002
Cadillac Hearse 1996, 1997, 1998, 1999
Cadillac Hearse CONCOURS 4 DR 1996
Cadillac Hearse DEVILLE 4 DR 1997
Cadillac Hearse SEVILLE 4 DR 1996, 1997
Cadillac High Luxury 1998, 1999
Cadillac Limousine 1996, 1997, 1998, 1999
Cadillac Limousine CONCOURS 4 DR 1996
Cadillac Limousine DEVILLE 4 DR 1997
Cadillac Limousine SEVILLE 4 DR 1996, 1997
Cadillac Seville 1996, 1997, 1998, 1999
Cadillac Seville 4 DR 1996, 1997
Cadillac Seville CONCOURS 4 DR 1996
Cadillac Seville DEVILLE 4 DR 1997
You will need to use AC Delco 25645365 (Windshield Washer Mist Sensor Cleaning Kit ($30 on amazon) to properly attach the sensor to the windshield.
The Impala turn signal stalk appears to work the same as the Cadillac (both CE1 and non-Ce1) and shouldn't need replaced. The first intermittent position appears to work the rain sensing wipers.
Start off with disconnecting your battery, R&R the Impala wiper motor with the Cadi wiper motor, and install the rain sensor behind the mirror. Now that the easy part is done letís get into the spaghetti (wiring).
The only wiring currently in the interior of the impala to change will be the pink wire from the turn signal stalk. You will need to cut that wire and connect the pink wire from the Cadillac sensor to the cut pink wire going to the turn signal stalk. The light blue wire from the Cadillac sensor will be connected to the cut pink wire going to the engine compartment (wiper motor) (changed back to Lt Blue at the Cadillac wiper motor plug-youíll see later).
Inside the engine compartment at the wiper motor there are two original plugs (3 pin-purple, yellow, black and 6 pin-yellow, grey, dark green, red, blue, pink) you will need to cut the existing 6 pin plug for the wiper motor and replace it with the Cadillac 8 pin pigtail from your donor Cadi.
5 of the 8 wires for the new 8 pin plug are the same color as the impala:
1) Dark Green to Dark Green
2) Gray to Gray
3) Red to Red
4) Dark Blue to Dark Blue
5) Yellow to Yellow
The remaining three wires are:
1) Pink (if you remember this was connected to the Lt Blue wire from the rain sensor inside the car) to Lt Blue on the 8 pin pigtail.
2) Purple from the new 8 pin pigtail spliced into the purple wire in the original impala 3 pin wiper motor.
3) Lt Green wire from the interior rain sensor, through the firewall to the Lt Green wire on the new Cadillac 8 pin plug.
Wrap it all up and youíre done! If youíre patient looking for the wiper motor and sensor this mod is reported to be around $100.
BIG THANKS TO RODNOK01 FROM Cadillac Owners and Enthusiasts Forum Homepage - Over 130,000 Members
FOR THE ORIGINAL WRITE-UP!