Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

3 Pages V < 1 2 3 >  
 Reply to this topicStart new topic
> Wiper switch differences, trying to add an elec. washer switch
Eric_Shea
post Feb 29 2012, 09:25 AM
Post #21


PMB Performance
***************

Group: Admin
Posts: 19,289
Joined: 3-September 03
From: Salt Lake City, UT
Member No.: 1,110
Region Association: Rocky Mountains
Interesting Mark. So if I pull my stalk and activate the pump, it should run the wipers what; 4 times? But you're saying the load from the pump will affect this?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Valy
post Feb 29 2012, 09:44 AM
Post #22


Senior Member
***

Group: Members
Posts: 1,677
Joined: 6-April 10
From: Sunnyvale, CA
Member No.: 11,573
Region Association: Northern California
QUOTE(Eric_Shea @ Feb 29 2012, 07:25 AM) *

Interesting Mark. So if I pull my stalk and activate the pump, it should run the wipers what; 4 times? But you're saying the load from the pump will affect this?

Eric, you're good. Your switch has separateed contacts for the pump and relay.
There were some out there that tried to use the same (brown/black) wire for both functoins.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Eric_Shea
post Feb 29 2012, 10:01 AM
Post #23


PMB Performance
***************

Group: Admin
Posts: 19,289
Joined: 3-September 03
From: Salt Lake City, UT
Member No.: 1,110
Region Association: Rocky Mountains
Whew...
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Bartlett 914
post Feb 29 2012, 01:54 PM
Post #24


Advanced Member
****

Group: Members
Posts: 2,218
Joined: 30-August 05
From: South Elgin IL
Member No.: 4,707
Region Association: Upper MidWest
QUOTE(Eric_Shea @ Feb 29 2012, 09:25 AM) *

Interesting Mark. So if I pull my stalk and activate the pump, it should run the wipers what; 4 times? But you're saying the load from the pump will affect this?

Hi Eric

The relay for the intermittent wipers will not work properly if you add a washer pump to the circuit. The resistance of the relay coil or the pump motor will render the intermittent inoperative. The circuit I made solves this problem. It is a high impedance relay driver. That is, the power to pull the relay is very low. Somewhere TTL signal level. The relay coil and the motor windings are low resistance. I made a perf board circuit as shown in the other thread. It is small and can be hidden. I may have another one I can send you or you can make your own.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Bartlett 914
post Feb 29 2012, 02:23 PM
Post #25


Advanced Member
****

Group: Members
Posts: 2,218
Joined: 30-August 05
From: South Elgin IL
Member No.: 4,707
Region Association: Upper MidWest
IIRC the brown white wire to the intermittent relay uses 3 signal levels. At ground, the intermittent wiper function is off. Pulse to 12 volts (as in a wiper stalk pull) and the intermittent relay will cause the wipers to give a few wipes. Open, and the intermittent function works. Changing the resistance to some extent (not enough to be useable) will change the delay time. If you put a relay with one grounded to this connection Washer pump coil or relay coil), the signal to the intermittent relay will appear to be grounded and no intermittent function.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Valy
post Feb 29 2012, 02:26 PM
Post #26


Senior Member
***

Group: Members
Posts: 1,677
Joined: 6-April 10
From: Sunnyvale, CA
Member No.: 11,573
Region Association: Northern California
DELETED
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Krieger
post Feb 29 2012, 07:59 PM
Post #27


Advanced Member
****

Group: Members
Posts: 4,769
Joined: 24-May 04
From: Santa Rosa CA
Member No.: 2,104
Region Association: None
Which fuse Burns? -5th one from right, it has the wiper/cig lighter on cover.
What exactly you turn on? When I turn on the wipers the motor starts to move then the fuse cooks
What's connected to the switch? All stock...except hot wire for cig lighter powers vdo fuel gauge, which functions correctly.
Have you done any modification? Pictures help very much. The harness is all stock otherwise. I do not have anything fancy added for the wipers.

Car is 75.
I replaced the 75 plastic steering column housing, with an earlier 73/4 metal unit. This is the assembly that holds the key/lock, wiper washer, turn signal
????
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Valy
post Feb 29 2012, 08:15 PM
Post #28


Senior Member
***

Group: Members
Posts: 1,677
Joined: 6-April 10
From: Sunnyvale, CA
Member No.: 11,573
Region Association: Northern California
Try this:
ignition off. Put the which in high speed position and turn on the switch.
If the wipers work then your short is in the return line from the motor to switch.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Krieger
post Feb 29 2012, 08:55 PM
Post #29


Advanced Member
****

Group: Members
Posts: 4,769
Joined: 24-May 04
From: Santa Rosa CA
Member No.: 2,104
Region Association: None
I put a 16 amp in and put the wiper switch all the way up, key on, zap! it immediately fried.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Valy
post Feb 29 2012, 09:17 PM
Post #30


Senior Member
***

Group: Members
Posts: 1,677
Joined: 6-April 10
From: Sunnyvale, CA
Member No.: 11,573
Region Association: Northern California
QUOTE(Krieger @ Feb 29 2012, 06:55 PM) *

I put a 16 amp in and put the wiper switch all the way up, key on, zap! it immediately fried.


OK. No more destructive tests for now.
I assume that the wipers didn't move at all, correct?
take out the connector from the switch and measure the resistance between the wires and ground.
here is what you should get:
green/white 0 ohm or very low
Red/white infinite.
black purple will read the motor resistance
Black blue should read higher resistance than previous one.

If all is good, next the switch will need to come out. If that's not an isstrue, you can take it out now to test the wires as crawling under it is a PITA.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Krieger
post Feb 29 2012, 09:27 PM
Post #31


Advanced Member
****

Group: Members
Posts: 4,769
Joined: 24-May 04
From: Santa Rosa CA
Member No.: 2,104
Region Association: None
Wipers didn't move. I am going to pull out the steering wheel now.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Krieger
post Feb 29 2012, 09:55 PM
Post #32


Advanced Member
****

Group: Members
Posts: 4,769
Joined: 24-May 04
From: Santa Rosa CA
Member No.: 2,104
Region Association: None
So I am measuring between the ground terminal on the plug (body harness) that goes into the back of the wiper switch and the other wires on that same plug?

here is what you should get:
green/white 0 ohm or very low---dont have a green/white, i have a black/green white
Red/white infinite.---red/gey?...
black purple will read the motor resistance---dont have
Black blue should read higher resistance than previous one.--dont have


My wires don't really match your descriptions...
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Krieger
post Feb 29 2012, 10:14 PM
Post #33


Advanced Member
****

Group: Members
Posts: 4,769
Joined: 24-May 04
From: Santa Rosa CA
Member No.: 2,104
Region Association: None
Plug


Attached thumbnail(s)
Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Valy
post Feb 29 2012, 10:26 PM
Post #34


Senior Member
***

Group: Members
Posts: 1,677
Joined: 6-April 10
From: Sunnyvale, CA
Member No.: 11,573
Region Association: Northern California
That's the signal switch connector. Look at the other one, smaller.
And use the car body for ground please.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Krieger
post Feb 29 2012, 10:34 PM
Post #35


Advanced Member
****

Group: Members
Posts: 4,769
Joined: 24-May 04
From: Santa Rosa CA
Member No.: 2,104
Region Association: None
Doh! I figured that out and this is what I'm getting
green/white infinity!!!!?
black/ blue 0
black/ purple 0
red/black infinity
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Valy
post Feb 29 2012, 10:44 PM
Post #36


Senior Member
***

Group: Members
Posts: 1,677
Joined: 6-April 10
From: Sunnyvale, CA
Member No.: 11,573
Region Association: Northern California
OK.
Green/white shows that your wipers are probably not completely parked. Don't worry about that for now.
The other two black ones show that your wiper motor is probably history or you have a short in the harness.
Can you switch the meter to the lowest ohm scale and repeat the measurement. You should get different readings, black/blue should be higher.
If bothe are still 0 it may be the harness.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Krieger
post Feb 29 2012, 10:53 PM
Post #37


Advanced Member
****

Group: Members
Posts: 4,769
Joined: 24-May 04
From: Santa Rosa CA
Member No.: 2,104
Region Association: None
black/purple 10.7
black/blue 10.2
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Krieger
post Feb 29 2012, 11:03 PM
Post #38


Advanced Member
****

Group: Members
Posts: 4,769
Joined: 24-May 04
From: Santa Rosa CA
Member No.: 2,104
Region Association: None
Just got an old wiper switch of unknown origin. Plugged it in turn on ignition flick switch, wiper works no problems....
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Eric_Shea
post Feb 29 2012, 11:19 PM
Post #39


PMB Performance
***************

Group: Admin
Posts: 19,289
Joined: 3-September 03
From: Salt Lake City, UT
Member No.: 1,110
Region Association: Rocky Mountains
Andy... It's your switch. (IMG:style_emoticons/default/wink.gif)

Happy to help! (IMG:style_emoticons/default/biggrin.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Valy
post Mar 1 2012, 12:36 AM
Post #40


Senior Member
***

Group: Members
Posts: 1,677
Joined: 6-April 10
From: Sunnyvale, CA
Member No.: 11,573
Region Association: Northern California
Eric, I knew you're going to master it! (IMG:style_emoticons/default/wink.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

3 Pages V < 1 2 3 >
Reply to this topicStart new topic
2 User(s) are reading this topic (2 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 28th December 2024 - 11:58 AM
Invision Power Board v9.1.4 © 2024  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...