| Electrical Separation Between Chassis Battery and House Battery [message #160701] |
Fri, 17 February 2012 16:25  |
A Hamilto
Messages: 4508
Registered: April 2011
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My 73 seems to be mostly unmodified. The house battery sits right next to the chassis battery in front of/under the passenger floorboard. When I took them out, I didn't pay any attention to how they were connected because I am smart enough to figure out how to put them back. Or so I thought.
One positive cable goes to the boost relay, and a cable goes from the same terminal back to the starter (through the starter solenoid probably). The other positive cable goes to the other side of the boost solenoid. One ground cable runs back and attaches to the engine. The other ground cable is bolted to the heavy frame that holds the radiator.
It seemed to me that the chassis battery positive should have the most direct route to the starter, so I connected it to the one that has the direct connection back to the starter solenoid. And the ground should be as direct a connection to the block as I can get.
When I hooked it up that way, the light over the sink and the exhaust fan over the stove came on.
I made sure the boost switch was set for "normal" and also tried the "boost" function. When I switched to "boost", the boost relay clicked. So I think it is working correctly. I set it back to "normal" and the relay released (at least it clicked again). When I turned the key, the starter turned the engine. When I connected the battery to the cable to (what I think is) the "house" side of the boost relay, turning the key had no effect.
Is there normally a connection between the house circuits and the chassis battery without setting the boost switch to "boost"?
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