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perko dual battery switch

Old 02-03-2003, 02:02 PM
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Default perko dual battery switch

Can anyone help me. Both batteries check out ok, the connections to batteries are clean, but I only get power on battery one or when switch to all. No power on battery two. Cables are connected as before when everything work fine. Is it likely that the cable connection at the switch is bad or the switch itself is bad
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Old 02-03-2003, 02:47 PM
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Default perko dual battery switch

Do you still get power on ALL when you disconnect the positive lead to battery 1? If so then you are getting power from Battery 2, if not, and you're sure that Battery 2 has a charge (test it at the nut on the back of the switch), then you must have a bad switch.

Should be easy to figure it out.
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Old 02-03-2003, 03:09 PM
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Default perko dual battery switch

Sometimes it is still possible to run juice from battery 2 through ALL and not through 2. The most common cause of this malfunction is when cables are attached to the switch in a way that binds up the switch body and pulls the cable post away from the contact plate inside. Take the cables off and the switch may test fine. Before you explore that though, double check all connections including grounds, you want them clean anyway don't you? and turn the switch back and forth real quick 6-7 times, sometimes that cleans up carbon on the contacts.
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Old 02-03-2003, 03:09 PM
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Default perko dual battery switch

Baldy thanks, I was trying to get as much info before I removed the switch. It is mounted in the bilge and a little tough to get to with a screw driver. I realize this may have allowed water to splash on the switch and affected it.
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Old 02-03-2003, 03:11 PM
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Default perko dual battery switch

I know this may sound like a stupid question, but do you have a jumper between the negative sides of both of the batterys?

Thom

"For every complex question, there's a simple answer. And it's wrong."
(--H. L. Mencken)
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Old 02-03-2003, 03:41 PM
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Default perko dual battery switch

Thom there is a jumper connecting the negative terminals.
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Old 02-03-2003, 04:03 PM
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Default perko dual battery switch

Frank,
I see... the dreaded bilge access issue.

If you have to take it off make sure to paint the nuts & connections with liq. elect. tape before you put it back on... if you haven't already done that.
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Old 02-04-2003, 08:39 AM
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Default perko dual battery switch

gaffmaster's suggestion has some merit. The body of the switch is basically plastic and not too strong. If the switch is not mounted on a perfectly flat surface, the 4 mounting screws could be distorting the plastic base and causing the slider assembly to lift off the battery contacts. Try loosening each screw slightly while testing for Bat contact.
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