Replacing Battery Interconnect Solinoid

subtroll wrote:
My 2004 National Tropi-cal electric systems appear to be working property except both Chassis and Coach batteries remain isolated from each other. AC sources(shore and generator) charge coach batteries fine but do not charge chassis batteries. Engine alternator charges my new chassis batteries fine.

Have located the Battery Interconnect Solenoid (out of the way behind a circuit board) and measure chassis battery voltage on one side and coach battery voltage on opposite side (~1 VDC difference). Measured 12 VDC on one control terminal indicating solenoid is energized but not connecting batteries. (I assume solenoid is normally open and closed when energized.) Believe that also confirms that whatever relay actuates the relay is OK.

Looks like replacement will require both sets of batteries and AC power to be disconnected and I don't know what solenoid to order. Looks to be similar to Battery disconnect relay in another compartment. Think I'll wait until my road trips are complete this year before replacing it.

Any suggestions?

You might first test it further by actuating your dash switch. If nothing happens, have someone hold it in, while you check for voltage on the coil terminals.
Also there should be voltage on the coil terminals, when one of the battery banks reach full charge.