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Old     (dcooper)      Join Date: Mar 2005       06-08-2005, 9:19 AM Reply   
Okay... so I am ready to wire three Simer pumps. I bought some switches that have three posts on back for on/off/on and a post for the lights, total of four posts. Will these work and how do I wire them? If not what swithes do I need? Also, I need to get a plate or panel to mount them in... any suggestions?
Old     (flsurflover)      Join Date: Aug 2003       06-08-2005, 11:12 AM Reply   
You can use DPDT, 6-pin switches. You can wire them up straight from battery to fuse to switch to pump, but if your wire runs are more than a few feet and you want to run all three pumps at the same time, you may want to use relays to keep the runs from your batteries to the pump as short as possible. And/or use very large wire. The Simers draw a lot of current, especially when they spike at turn-on. Turn them on one at a time.

Here's way too much info on wiring the switches, along with a relay schematic that most people use. It's a little confusing on the first read through:

I drilled mounting spaces into the fiberglass next to my throttle arm, but you could also mount them in your dash or make a small box to mount under the dash, or at the drivers feet, etc.

Good luck. You will be very happy when you have it all working right.
Old     (dschock)      Join Date: Jun 2005       06-08-2005, 11:15 AM Reply   
Sorry, those aren't going to work if you want to wire them reversibly. On/off/on means it's the same polarity being sent out for both directions of the switch. You need a reversible 6 or 7 pin switch for each pump. I did a quick search and came up with this thread to detail the wiring.

Hope that helps.
Old     (dschock)      Join Date: Jun 2005       06-08-2005, 11:17 AM Reply   
Oops, surflover beat me to it.
Old     (mikeski)      Join Date: Aug 2003       06-08-2005, 12:45 PM Reply   
Need to use DPDT (double pole double throw) switches or relays, I prefer the DPDTs for simplicity. You can get them in rockers or toggles from various sources. You don't want the momentary variety.

DPDT on-off-on
not DPDT (on)-off-(on)
Old     (dcooper)      Join Date: Mar 2005       06-09-2005, 12:52 PM Reply   
Thanks for the help. I am going to try it this weekend.


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