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Re: Electrical gremlins, charging set up, and questions [message #310282 is a reply to message #310280] Sat, 12 November 2016 22:50 Go to previous messageGo to previous message
A Hamilto is currently offline  A Hamilto   United States
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Registered: April 2011
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Atom Ant wrote on Sat, 12 November 2016 21:47
Can someone help me understand why there would be a wire from the positive side of the chassis battery to BOTH large terminals on the post solenoid? If one side is chassis, and the other side is house, why would there be wires from the positive battery post to each side? My positive has two terminal wires on POS.
The boost solenoid is wired wrong. There should be one #4 wire from the positive post of the house battery to one large lug of the boost solenoid. There should be one #4 wire from the chassis battery to the other large lug of the boost solenoid. When you need to get more juice on the chassis battery side to start the engine, you engage the boost switch on the dashboard that energizes the solenoid, pulling the plunger into the contacts that connect the positive of the house battery directly to the positive of the chassis battery. Some people wait a bit for the house battery to charge the chassis battery and then hit the starter, others hit the starter immediately.

The boost solenoid acts like a jumper cable between the house battery and the chassis battery when engaged.
 
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