wiring for washer pump switch, am I doing this right? |
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wiring for washer pump switch, am I doing this right? |
914 RZ-1 |
Apr 29 2017, 04:45 PM
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#1
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Porsche Padawan Group: Members Posts: 682 Joined: 17-December 14 From: Santa Clarita, CA Member No.: 18,230 Region Association: Southern California |
I'm adding washer fluid pump to my '72. I got a pump and switch. I want to make sure I'm wiring it correctly:
1. Negative on pump goes to ground somewhere on bare metal on car. 2. Positive on pump goes to "LOAD" tab on switch. 3. "EARTH" on switch goes to ground somewhere on bare metal on car. 4. "LOAD" on switch goes to + on pump. 5. "SUPPLY" on switch goes to fuse (#8 or #10, I think), which supplies the power. Is this correct? I got the switch at Radio Shack. It's a "push-to-work" and a light on the switch goes on. It needs to be pushed again to shut it off. I got the pump at Pelican. Thanks! |
Valy |
Apr 29 2017, 05:18 PM
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#2
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Senior Member Group: Members Posts: 1,671 Joined: 6-April 10 From: Sunnyvale, CA Member No.: 11,573 Region Association: Northern California |
It's right but why don't you use a Porsche wiper switch with electric pump activation?
It's been discussed here a lot. Just search my posts on this topic. I'm adding washer fluid pump to my '72. I got a pump and switch. I want to make sure I'm wiring it correctly: 1. Negative on pump goes to ground somewhere on bare metal on car. 2. Positive on pump goes to "LOAD" tab on switch. 3. "EARTH" on switch goes to ground somewhere on bare metal on car. 4. "LOAD" on switch goes to + on pump. 5. "SUPPLY" on switch goes to fuse (#8 or #10, I think), which supplies the power. Is this correct? I got the switch at Radio Shack. It's a "push-to-work" and a light on the switch goes on. It needs to be pushed again to shut it off. I got the pump at Pelican. Thanks! |
914 RZ-1 |
Apr 29 2017, 06:15 PM
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#3
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Porsche Padawan Group: Members Posts: 682 Joined: 17-December 14 From: Santa Clarita, CA Member No.: 18,230 Region Association: Southern California |
[quote name='Valy' date='Apr 29 2017, 04:18 PM' post='2480953']
It's right but why don't you use a Porsche wiper switch with electric pump activation? It's been discussed here a lot. Just search my posts on this topic. I saw all those. This is easier. |
BillC |
Apr 29 2017, 06:33 PM
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#4
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Senior Member Group: Members Posts: 535 Joined: 24-April 15 From: Silver Spring, MD Member No.: 18,667 Region Association: MidAtlantic Region |
If you're going to use a separate switch for the pump, look for a momentary-on switch. That way, it only pumps while you hold the button/toggle and stops when you let go.
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914werke |
Apr 29 2017, 07:45 PM
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#5
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"I got blisters on me fingers" Group: Members Posts: 9,998 Joined: 22-March 03 From: USofA Member No.: 453 Region Association: Pacific Northwest |
or this
Attached image(s) |
SirAndy |
Apr 29 2017, 07:55 PM
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#6
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Resident German Group: Admin Posts: 41,606 Joined: 21-January 03 From: Oakland, Kalifornia Member No.: 179 Region Association: Northern California |
If you're going to use a separate switch for the pump, look for a momentary-on switch. That way, it only pumps while you hold the button/toggle and stops when you let go. (IMG:style_emoticons/default/agree.gif) http://www.914world.com/specs/tech_el_washer.php (IMG:style_emoticons/default/smile.gif) |
Spoke |
Apr 29 2017, 10:20 PM
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#7
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Jerry Group: Members Posts: 6,972 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
I'm adding washer fluid pump to my '72. I got a pump and switch. I want to make sure I'm wiring it correctly: 1. Negative on pump goes to ground somewhere on bare metal on car. 2. Positive on pump goes to "LOAD" tab on switch. 3. "EARTH" on switch goes to ground somewhere on bare metal on car. 4. "LOAD" on switch goes to + on pump. 5. "SUPPLY" on switch goes to fuse (#8 or #10, I think), which supplies the power. Is this correct? I got the switch at Radio Shack. It's a "push-to-work" and a light on the switch goes on. It needs to be pushed again to shut it off. I got the pump at Pelican. Thanks! On your schematic, swap ground and +12V. +12V should be wired to the pump through a fuse. The negative side of the pump should go through the switch to ground. This way if any of the switch wires accidentally are shorted to ground, you won't blow a fuse. Also as SirAndy mentioned, the switch should be momentary ON switch, not latching as described. |
jcd914 |
Apr 30 2017, 01:35 AM
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#8
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Advanced Member Group: Members Posts: 2,081 Joined: 7-February 08 From: Sacramento, CA Member No.: 8,684 Region Association: Northern California |
I'm adding washer fluid pump to my '72. I got a pump and switch. I want to make sure I'm wiring it correctly: 1. Negative on pump goes to ground somewhere on bare metal on car. 2. Positive on pump goes to "LOAD" tab on switch. 3. "EARTH" on switch goes to ground somewhere on bare metal on car. 4. "LOAD" on switch goes to + on pump. 5. "SUPPLY" on switch goes to fuse (#8 or #10, I think), which supplies the power. Is this correct? I got the switch at Radio Shack. It's a "push-to-work" and a light on the switch goes on. It needs to be pushed again to shut it off. I got the pump at Pelican. Thanks! On your schematic, swap ground and +12V. +12V should be wired to the pump through a fuse. The negative side of the pump should go through the switch to ground. This way if any of the switch wires accidentally are shorted to ground, you won't blow a fuse. Also as SirAndy mentioned, the switch should be momentary ON switch, not latching as described. I am going to disagree with Spoke on switching your wires around. It is always best practice to make your "normally hot" leg of a circuit as short as possible. That way under normal conditions there is a shorter stretch of wire that can be shorted. In this case that is the wire from the fused power supply to the switch. The fuses are under that dash the switch connections will be under that dash, not much wire there. the pump on the other hand probably will be mounted near washer bottle, significantly farther from the fuse panel. But he is correct you should be using a momentary contact switch. Jim |
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