Hello Ambet717

and to the Gulf Stream Owners Forum. We are glad to have you join us here and we look forward to reading of your adventures and experiences. I am sure you will enjoy the website and forums. Good luck, stay safe and keep us posted.
Make sure the battery disconnect it turned on. If so, I would suggest that you trace the 12+ from the battery bank to the over current protection device (fuse or circuit breaker) verifying they are good. Continue on to the battery disconnect solenoid ( line & load side) for the same. If this all checks good, check the 12- to verify that it is properly grounded to the chassis. Make sure, sometimes it looks OK but looks can be deceiving. Let us know what you find.
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Mike, Certified Master RV Technician
Amy, RV Merchandiser; Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser w/ Banks & 2 toads