Apologies in advance - I really hate to be "that" new user who's first post is of technical persuasion. After hours of troubleshooting and three calls to Thor tech support, I'm done (but not beyond asking for help). Our Gemini 23TB is almost two years old. A little history:
- Purchased in April 2017. Coach OEM dual batteries were stickered 12/14.
- Coach batteries never held a charge to support house operations (less than four hours run time to depletion). Batteries were stone dead. Motorhome functionality was as designed up until November when it was parked.
- Installed two new batteries a month ago (January).
- Use/Store (battery disconnect) switch does not transfer to/from batteries, ie: no solenoid audible "click." Herein, the fun (brain damage) began...
- Validated 50 amp fuse was not tripped (located on metal underside panel of coach to the left of and parallel to the upper entry step and dual battery box). Also tested and found 12volts to both sides of 50amp fuse housing. Cables tight.
- Validated 5amp inline fuse from Trombetta wasn't blown (replaced anyway)
- Validated main 25 amp house fuse in inverter fuse panel was not blown.
- 12 volts to six pin "use/store" battery disconnect wires on both upper and lower pins. Removed switch, used meter to check open/close. Switch works correctly. Replaced six pin "momentary rocker" (use/store) switch. Both old and new switches test identical on ohm meter. Problem not resolved.
- Suspecting Trombetta was the issue, a new solenoid was installed. Both new and old Trombetta metered the same when disconnected. Before and after, there was/is 12v to both battery lug posts when connected. Solenoid is located on outer left side of battery box/step, under coach. Problem not resolved.
- IRD (isolator relay delay) seems to be working. ie: 13.6 volts to batteries when engine is running. Located on outer left side of battery box/step under coach.
- IRD Black wire to ground, Red wire to solenoid small post (non grounded)and Blue wire connected to harness where two yellow (one w black stripe) wires exit and route up onto chassis frame and towards back of coach.
- With engine running, 13.6 volts to both coach batteries
- Plugged into shore power, house functions normally
- Unplugged from shore power, no house functions operate. No audible solenoid click resulting from activating "use/store" switch. Olin will not start. Cannot obtain reading on battery, propane, holding tanks indicators.
Geeze, is there a super-secret fuse hidden somewhere that I'm missing? It sure feels like it. Any help would be most appreciated. Thank-you in advance.
Thor Forums
